传智黑马Java学成在线项目第3天讲义-CMS页面管理开发二

﹏ヽ暗。殇╰゛Y 2022-12-27 09:28 57阅读 0赞

**4 ****删除页面**  
用户操作流程：  
1、用户进入用户列表，点击“删除”  
2、执行删除操作，提示“删除成功”或“删除失败”  
**4.1 ****删除页面接口定义**

**4.2 ****删除页面服务端开发**  
**4.2.1Dao**  
使用 Spring Data提供的deleteById方法完成删除操作 。  
**4.2.2 Service**

**4.2.3Controller**

**4.3 ****删除页面前端开发**  
**4.3.1 Api****方法**

**4.3.2****编写页面**  
1、在page\_list.vue页面添加删除按钮

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    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>el</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>table</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>column</code> 
      <code>label</code> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>操作</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>width</code> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>120</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>template slot</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>scope</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>page</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>el</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>button</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>size</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>small</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>type</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>text</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@click</code> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>edit(page.row.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>pageId)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>编辑</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>/</code> 
      <code>el</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>button</code> 
      <code>&gt;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>el</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>button</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>size</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>small</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>type</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>text</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@click</code> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>del(page.row.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>pageId)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>删除</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>/</code> 
      <code>el</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>button</code> 
      <code>&gt;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>/</code> 
      <code>template</code> 
      <code>&gt;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&lt;</code> 
      <code>/</code> 
      <code>el</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>table</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>column</code> 
      <code>&gt;</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

2、删除事件

<table style="width:700px;"> 
 <tbody> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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     <span style="color:#afafaf;">40</span> 
    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
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    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">51</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">52</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">53</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>删除</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>del</code> 
      <code>:</code> 
      <code>function </code> 
      <code>(</code> 
      <code>pageId</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$confirm</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>确认删除此页面吗?</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>提示</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
      <code>{ </code> 
      <code>}</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
      <code>then</code> 
      <code>(</code> 
      <code>(</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>cmsApi.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>page_del</code> 
      <code>(</code> 
      <code>pageId</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
      <code>then</code> 
      <code>(</code> 
      <code>(</code> 
      <code>res</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>if</code> 
      <code>(</code> 
      <code>res.success</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$</code> 
      <code>message</code> 
      <code>(</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>type</code> 
      <code>:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>success</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>message</code> 
      <code>:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>删除成功!</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>查询页面</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>query</code> 
      <code>(</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>else</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$</code> 
      <code>message</code> 
      <code>(</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>type</code> 
      <code>:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>error</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>message</code> 
      <code>:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>删除失败!</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

**5 ****异常处理**  
**5.1 ****异常处理的问题分析**  
从添加页面的service方法中找问题：

<table> 
 <tbody> 
  <tr> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">01</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">02</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">03</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">04</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">05</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">06</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">07</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">08</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">09</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">10</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">11</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">12</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">13</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">14</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">15</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">16</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">17</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">18</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">19</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">20</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">21</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>添加页面</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public CmsPageResult </code> 
      <code>add</code> 
      <code>(</code> 
      <code>CmsPage cmsPage</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>校验页面是否存在，根据页面名称、站点Id、页面webpath查询</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>CmsPage cmsPage</code> 
      <code>1</code> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>cmsPageRepository</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.findByPageNameAndSiteIdAndPageWebPath</code> 
      <code>(</code> 
      <code>cmsPage.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getPageName</code> 
      <code>(</code> 
      <code>)</code> 
      <code>,</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>cmsPage.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getSiteId</code> 
      <code>(</code> 
      <code>)</code> 
      <code>,</code> 
      <code>cmsPage.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getPageWebPath</code> 
      <code>(</code> 
      <code>)</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>if</code> 
      <code>(</code> 
      <code>cmsPage</code> 
      <code>1</code> 
      <code>=</code> 
      <code>=</code> 
      <code>null</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>cmsPage.setPageId</code> 
      <code>(</code> 
      <code>null</code> 
      <code>)</code> 
      <code>;</code> 
      <code>/</code> 
      <code>/</code> 
      <code>添加页面主键由spring </code> 
      <code>data</code> 
      <code>自动生成</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>cmsPageRepository</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
      <code>save</code> 
      <code>(</code> 
      <code>cmsPage</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>返回结果</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>CmsPageResult cmsPageResult</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>new</code> 
      <code>CmsPageResult</code> 
      <code>(</code> 
      <code>CommonCode.SUCCESS</code> 
      <code>,</code> 
      <code>cmsPage</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>return</code> 
      <code>cmsPageResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>return</code> 
      <code>new</code> 
      <code>CmsPageResult</code> 
      <code>(</code> 
      <code>CommonCode.FAIL</code> 
      <code>,</code> 
      <code>null</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

问题：  
1 、上边的代码只要操作不成功仅向用户返回 “ 错误代码： 11111 ，失败信息：操作失败 ” ，无法区别具体的错误信 息。  
2 、 service 方法在执行过程出现异常在哪捕获？在 service 中需要都加 try/catch ，如果在 controller 也需要添加 try/catch ，代码冗余严重且不易维护。  
解决方案：  
1 、在 Service 方法中的编码顺序是先校验判断，有问题则抛出具体的异常信息，最后执行具体的业务操作，返回成 功信息。  
2 、在统 一 异常处理类中去捕获异常，无需 controller 捕获异常，向用户返回统 一 规范的响应信息。  
代码模板如下：

**5.2 ****异常处理流程**  
系统对异常的处理使用统一的异常处理流程：  
1、自定义异常类型。  
2、自定义错误代码及错误信息。  
3、对于可预知的异常由程序员在代码中主动抛出，由SpringMVC统一捕获。  
可预知异常是程序员在代码中手动抛出本系统定义的特定异常类型，由于是程序员抛出的异常，通常异常信息比较齐全，程序员在抛出时会指定错误代码及错误信息，获取异常信息也比较方便。  
4、对于不可预知的异常（运行时异常）由SpringMVC统一捕获Exception类型的异常。不可预知异常通常是由于系统出现bug、或一些不要抗拒的错误（比如网络中断、服务器宕机等），异常类型为RuntimeException类型（运行时异常）。  
5、可预知的异常及不可预知的运行时异常最终会采用统一的信息格式（错误代码\+错误信息）来表示，最终也会随请求响应给客户端。  
异常抛出及处理流程  
  
![5c920e9006540527ae21b24f8f2c49ea.png][]  
1、在controller、service、dao中程序员抛出自定义异常；springMVC框架抛出框架异常类型  
2、统一由异常捕获类捕获异常，并进行处理  
3、捕获到自定义异常则直接取出错误代码及错误信息，响应给用户。  
  
4、捕获到非自定义异常类型首先从Map中找该异常类型是否对应具体的错误代码，如果有则取出错误代码和错误信息并响应给用户，如果从Map中找不到异常类型所对应的错误代码则统一为99999错误代码并响应给用户。  
5、将错误代码及错误信息以Json格式响应给用户。

**5.3 ****可预知异常处理**  
**5.3.1 ****自定义异常类**  
在common工程定义异常类型。

<table> 
 <tbody> 
  <tr> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">01</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">02</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">03</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">04</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">05</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">06</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">07</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">08</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">09</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">10</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">11</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">12</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">13</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">14</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">15</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">16</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">17</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">18</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">19</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">20</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">21</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">22</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">23</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">24</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>package com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.exception;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.model.response.ResultCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public </code> 
      <code>class</code> 
      <code>CustomException extends RuntimeException </code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>private ResultCode resultCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public CustomException</code> 
      <code>(</code> 
      <code>ResultCode resultCode</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>异常信息为错误代码</code> 
      <code>+</code> 
      <code>异常信息</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>super</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>错误代码：</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>+</code> 
      <code>resultCode.code</code> 
      <code>(</code> 
      <code>)</code> 
      <code>+</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>错误信息：</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>+</code> 
      <code>resultCode.</code> 
      <code>message</code> 
      <code>(</code> 
      <code>)</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.resultCode</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>resultCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public ResultCode getResultCode</code> 
      <code>(</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>return</code> 
      <code>this.resultCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

**5.3.2 ** **异常抛出类**

**5.3.3 ** **异常捕获类**  
使用  @ControllerAdvice 和 @ExceptionHandler 注解来捕获指定类型的异常

<table style="width:700px;"> 
 <tbody> 
  <tr> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">01</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">02</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">03</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">04</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">05</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">06</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">07</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">08</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">09</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">10</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">11</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">12</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">13</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">14</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">15</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">16</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">17</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">18</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">19</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">20</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">21</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">22</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">23</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">24</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">25</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">26</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">27</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">28</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">29</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">30</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">31</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">32</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">33</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">34</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">35</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">36</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">37</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">38</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">39</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">40</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">41</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">42</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>package com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.exception;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.model.response.ResponseResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.model.response.ResultCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.slf</code> 
      <code>4</code> 
      <code>j</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.Logger;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.slf</code> 
      <code>4</code> 
      <code>j</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.LoggerFactory;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.web.bind.annotation.ControllerAdvice;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.web.bind.annotation.ExceptionHandler;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.web.bind.annotation.ResponseBody;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ControllerAdvice</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public </code> 
      <code>class</code> 
      <code>ExceptionCatch </code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>private static final Logger LOGGER </code> 
      <code>=</code> 
      <code>LoggerFactory</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getLogger</code> 
      <code>(</code> 
      <code>ExceptionCatch.</code> 
      <code>class</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>捕获 CustomException异常</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ExceptionHandler</code> 
      <code>(</code> 
      <code>CustomException.</code> 
      <code>class</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ResponseBody</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public ResponseResult customException</code> 
      <code>(</code> 
      <code>CustomException e</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>LOGGER.</code> 
      <code>error</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>catch exception : {}\r\nexception:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
      <code>e.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getMessage</code> 
      <code>(</code> 
      <code>)</code> 
      <code>,</code> 
      <code>e</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>ResultCode resultCode</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>e.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getResultCode</code> 
      <code>(</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>ResponseResult responseResult</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>new</code> 
      <code>ResponseResult</code> 
      <code>(</code> 
      <code>resultCode</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>return</code> 
      <code>responseResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

**5.3.4** **异常处理测试**  
**5.3.4.1** **定义错误代码**  
每个业务操作的异常使用异常代码去标识。

**5.3.4.2 ** **异常处理测试**  
1 、抛出异常  
在 controller 、 service 、  dao 中都可以抛出异常。  
修改 PageService 的 add 方法，添加抛出异常的代码

2 、启动工程，扫描到异常捕获的类 ExceptionCatch

<table> 
 <tbody> 
  <tr> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">1</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">2</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">3</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">4</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">5</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">6</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">7</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">8</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>在springBoot的启动类中添加</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ComponentScan</code> 
      <code>(</code> 
      <code>basePackages</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>)</code> 
      <code>/</code> 
      <code>/</code> 
      <code>扫描common工程下的类</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

3 、前端展示异常信息  
服务端响应信息如下：  
![1a2f4b1d2dc7660003cb9a8ed862179d.png][]  
页面提取异常处理

<table style="width:700px;"> 
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   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">01</span> 
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     <span style="color:#afafaf;">02</span> 
    </div> 
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     <span style="color:#afafaf;">03</span> 
    </div> 
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     <span style="color:#afafaf;">04</span> 
    </div> 
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     <span style="color:#afafaf;">05</span> 
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     <span style="color:#afafaf;">11</span> 
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     <span style="color:#afafaf;">12</span> 
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    </div> 
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     <span style="color:#afafaf;">14</span> 
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     <span style="color:#afafaf;">26</span> 
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     <span style="color:#afafaf;">27</span> 
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     <span style="color:#afafaf;">28</span> 
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     <span style="color:#afafaf;">29</span> 
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     <span style="color:#afafaf;">30</span> 
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     <span style="color:#afafaf;">39</span> 
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     <span style="color:#afafaf;">40</span> 
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     <span style="color:#afafaf;">41</span> 
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     <span style="color:#afafaf;">42</span> 
    </div> 
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     <span style="color:#afafaf;">43</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">44</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">45</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">46</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">47</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">48</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">49</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">50</span> 
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     <span style="color:#afafaf;">51</span> 
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     <span style="color:#afafaf;">52</span> 
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     <span style="color:#afafaf;">53</span> 
    </div> 
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     <span style="color:#afafaf;">54</span> 
    </div> 
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     <span style="color:#afafaf;">55</span> 
    </div> 
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     <span style="color:#afafaf;">56</span> 
    </div> 
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     <span style="color:#afafaf;">57</span> 
    </div> 
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     <span style="color:#afafaf;">58</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">59</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">60</span> 
    </div> 
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     <span style="color:#afafaf;">61</span> 
    </div> 
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     <span style="color:#afafaf;">62</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">63</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>addSubmit</code> 
      <code>(</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$refs.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>pageForm.validate</code> 
      <code>(</code> 
      <code>(</code> 
      <code>valid</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>if</code> 
      <code>(</code> 
      <code>valid</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$confirm</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>确认提交吗？</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>提示</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
      <code>{ </code> 
      <code>}</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
      <code>then</code> 
      <code>(</code> 
      <code>(</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>cmsApi.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>page_add</code> 
      <code>(</code> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>pageForm</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
      <code>then</code> 
      <code>(</code> 
      <code>(</code> 
      <code>res</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>&gt;</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>console.</code> 
      <code>log</code> 
      <code>(</code> 
      <code>res</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>if</code> 
      <code>(</code> 
      <code>res.success</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$</code> 
      <code>message</code> 
      <code>(</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>message</code> 
      <code>:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>提交成功</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>type</code> 
      <code>:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>success</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$refs[</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>pageForm</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>]</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.resetFields</code> 
      <code>(</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>else if</code> 
      <code>(</code> 
      <code>res.</code> 
      <code>message</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$</code> 
      <code>message</code> 
      <code>.</code> 
      <code>error</code> 
      <code>(</code> 
      <code>res.</code> 
      <code>message</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>else</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>this.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>$</code> 
      <code>message</code> 
      <code>.</code> 
      <code>error</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>提交失败</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>'</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

**5.4 ****不可预知异常处理**  
**5.4.1 ****定义异常捕获方法**  
**5.4.1.1 ****异常抛出测试**  
使用postman测试添加页面，不输入cmsPost信息，提交，报错信息如下：

具体的响应的信息为：

上边的响应信息在客户端是无法解析的。  
在异常捕获类中添加对 Exception 异常的捕获：

**5.4.1.2 ** **异常捕获方法**  
针对上边的问题其解决方案是：  
1 、我们在 map 中配置 HttpMessageNotReadableException 和错误代码。  
2 、在异常捕获类中对 Exception 异常进行捕获，并从 map 中获取异常类型对应的错误代码，如果存在错误代码则返 回此错误，否则统 一 返回 99999 错误。  
具体的开发实现如下：  
1 、在通用错误代码类 CommCode 中配置非法参数异常

2 、在异常捕获类中配置  HttpMessageNotReadableException  为非法参数异常。  
异常捕获类代码如下：

<table style="width:700px;"> 
 <tbody> 
  <tr> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">001</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">002</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">003</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">004</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">005</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">006</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">007</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">008</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">009</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">010</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">011</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">012</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">013</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">014</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">015</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">016</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">017</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">018</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">019</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">020</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">021</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">022</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">023</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">024</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">025</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">026</span> 
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    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">027</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">028</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">029</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">030</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">031</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">032</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">033</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">034</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">035</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">036</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">037</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">038</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">039</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">040</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">041</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">042</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">043</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">044</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">045</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">046</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">047</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">048</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">049</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">050</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">051</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">052</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">053</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">054</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">055</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">056</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">057</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">058</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">059</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">060</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">061</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">062</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">063</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">064</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">065</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">066</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">067</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">068</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">069</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">070</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">071</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">072</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">073</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">074</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">075</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">076</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">077</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">078</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">079</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">080</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">081</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">082</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">083</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">084</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">085</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">086</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">087</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">088</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">089</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">090</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">091</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">092</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">093</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">094</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">095</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">096</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">097</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">098</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">099</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">100</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">101</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">102</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">103</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">104</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">105</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">106</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">107</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">108</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">109</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">110</span> 
    </div> 
    <div style="margin-left:0px;"> 
     <span style="color:#afafaf;">111</span> 
    </div> </td> 
   <td style="text-align:left;vertical-align:baseline;"> 
    <div style="margin-left:0px;"> 
     <div style="margin-left:0px;"> 
      <code>package com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.exception;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>google.common.collect.ImmutableMap</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.model.response.CommonCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.model.response.ResponseResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import com.xuecheng</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.framework.model.response.ResultCode;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.slf</code> 
      <code>4</code> 
      <code>j</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.Logger;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.slf</code> 
      <code>4</code> 
      <code>j</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.LoggerFactory;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.http</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.converter.HttpMessageNotReadableException;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.web.bind.annotation.ControllerAdvice;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.web.bind.annotation.ExceptionHandler;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>import org</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.springframework.web.bind.annotation.ResponseBody;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>*</code> 
      <code>*</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>*</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@author Administrator</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>*</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@</code> 
      <code>version</code> 
      <code>1.0</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>*</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@create </code> 
      <code>2018</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>06</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>‐</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>11</code> 
      <code>17</code> 
      <code>:</code> 
      <code>16</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>*</code> 
      <code>*</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ControllerAdvice</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public </code> 
      <code>class</code> 
      <code>ExceptionCatch </code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>private static final Logger LOGGER </code> 
      <code>=</code> 
      <code>LoggerFactory</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getLogger</code> 
      <code>(</code> 
      <code>ExceptionCatch.</code> 
      <code>class</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>使用EXCEPTIONS存放异常类型和错误代码的映射，ImmutableMap的特点的</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>一</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>旦创建不可改变，并且线程安全</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>private static ImmutableMap</code> 
      <code>&lt;</code> 
      <code>Class</code> 
      <code>&lt;</code> 
      <code>? extends Throwable</code> 
      <code>&gt;</code> 
      <code>,</code> 
      <code>ResultCode</code> 
      <code>&gt;</code> 
      <code>EXCEPTIONS;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>使用builder来构建</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>一</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>个异常类型和错误代码的异常</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>protected static ImmutableMap</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.Builder</code> 
      <code>&lt;</code> 
      <code>Class</code> 
      <code>&lt;</code> 
      <code>? extends Throwable</code> 
      <code>&gt;</code> 
      <code>,</code> 
      <code>ResultCode</code> 
      <code>&gt;</code> 
      <code>builder </code> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>ImmutableMap</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>.builder</code> 
      <code>(</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>捕获Exception异常</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ResponseBody</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ExceptionHandler</code> 
      <code>(</code> 
      <code>Exception.</code> 
      <code>class</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public ResponseResult exception</code> 
      <code>(</code> 
      <code>Exception e</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>LOGGER.</code> 
      <code>error</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>catch exception : {}\r\nexception:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
      <code>e.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getMessage</code> 
      <code>(</code> 
      <code>)</code> 
      <code>,</code> 
      <code>e</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>if</code> 
      <code>(</code> 
      <code>EXCEPTIONS</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>=</code> 
      <code>null</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>EXCEPTIONS</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>builder.build</code> 
      <code>(</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>final ResultCode resultCode</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>EXCEPTIONS.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>get</code> 
      <code>(</code> 
      <code>e.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getClass</code> 
      <code>(</code> 
      <code>)</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>final ResponseResult responseResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>if</code> 
      <code>(</code> 
      <code>resultCode !</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>null</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>responseResult</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>new</code> 
      <code>ResponseResult</code> 
      <code>(</code> 
      <code>resultCode</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
      <code>else</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>responseResult</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>new</code> 
      <code>ResponseResult</code> 
      <code>(</code> 
      <code>CommonCode.SERVER_ERROR</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>return</code> 
      <code>responseResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>捕获 CustomException异常</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ExceptionHandler</code> 
      <code>(</code> 
      <code>CustomException.</code> 
      <code>class</code> 
      <code>)</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>@ResponseBody</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>public ResponseResult customException</code> 
      <code>(</code> 
      <code>CustomException e</code> 
      <code>)</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>LOGGER.</code> 
      <code>error</code> 
      <code>(</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>catch exception : {}\r\nexception:</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>"</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>,</code> 
      <code>e.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getMessage</code> 
      <code>(</code> 
      <code>)</code> 
      <code>,</code> 
      <code>e</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>ResultCode resultCode</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>e.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>getResultCode</code> 
      <code>(</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>ResponseResult responseResult</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>=</code> 
      <code>new</code> 
      <code>ResponseResult</code> 
      <code>(</code> 
      <code>resultCode</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>return</code> 
      <code>responseResult;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>static</code> 
      <code>{ </code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>/</code> 
      <code>/</code> 
      <code>在这里加入</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>一</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>些基础的异常类型判断</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>builder.</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>put</code> 
      <code>(</code> 
      <code>HttpMessageNotReadableException.</code> 
      <code>class</code> 
      <code>,</code> 
      <code>CommonCode.INVALIDPARAM</code> 
      <code>)</code> 
      <code>;</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
     <div style="margin-left:0px;"> 
      <code>}</code> 
     </div> 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

**5.4.3 ****异常处理测试**  
仍然模拟  
“  
问题测试  
”  
中的测试步骤，异常结果为  
“  
非法参数  
”  
。  
**6 ****实战**  
此部分为自学内容，根据今天所学知识完成下边的任务。  
**6.1 ****查询条件完善**  
页面查询条件增加：页面名称、页面类型。  
页面名称对应CmsPage模型类中的pageName属性。  
页面类型对应CmsPage模型类中的pageType属性。  
查询要求：  
页面名称：模糊查询  
页面类型：精确匹配，页面类型包括：静态和动态，在数据库中静态用“0”表示，动态用“1”表示。  
**6.2 ****页面属性增加****DataUrl**  
在CmsPage.  
java模型类型中有一个dataUrl属性，此属性在页面静态化时需要填写。  
本需求要求：  
1、在新增页面增加dataUrl输入框，并支持添加。  
2、在修改页面增加dataUrl输入框，并支持修改。

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[5c920e9006540527ae21b24f8f2c49ea.png]: /images/20221120/e8186e49558444ceb71c3ac6ff0d900f.png
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[20_1-10]: http://yun.itheima.com/course/295.html?stt%C2%A0