作者(zhang854429783) eclipse通过tomcat热部署web项目

淩亂°似流年 2022-07-17 01:43 209阅读 0赞

# [eclipse通过tomcat热部署web项目][eclipse_tomcat_web] #

标签： [eclipse][][hot-deploy][][tomcat][]

2015-11-28 20:29  246人阅读  [评论][Link 1](1)  收藏  [举报][Link 2]

![category_icon.jpg][]  分类：

java（12） ![arrow_triangle_20_down.jpg][]  eclipse（5） ![arrow_triangle_20_down.jpg][]  tomcat

目录[(?)][Link 3][\[-\]][Link 3]

1.  [怎么配置eclipse热部署][eclipse 1]
    
    1.  [热部署例子][Link 4]
        
        1.  [1 源代码][1]
        2.  [2 修改代码添加一些日志][2]
    2.  [在eclipse里面配置热部署][eclipse 2]
        
        1.  [1 单击Overview选项卡][1 _Overview]
            
            1.  [11 展开Server Options勾选Serve modules without publishing选项][11 _Server Options_Serve modules without publishing]
            2.  [12 展开publishing勾选Automatically publish when resources change选项这个配置是用来热部署资源如JSPXML和properties文件等][12 _publishing_Automatically publish when resources change_JSPXML_properties]
        2.  [2 单击Modules选项卡确保Auto Reload是被禁用的][2 _Modules_Auto Reload]
        3.  [4 以DEBUG模式启动tomcat热部署在DEBUG模式下才可用][4 _DEBUG_tomcat_DEBUG]
    3.  [限制][Link 5]

# 怎么配置eclipse热部署 #

本文章将会演示怎么配置eclipse调试器在不重启服务器的情况下支持热部署，热插拔或者热码替换。   
环境：

*  Eclipse 4.4（老版本也一样支持）
 *  Eclipse Tomcat 插件

--------------------

## 1. 热部署例子 ##

通过这个简单的热部署例子，可以在不用重启tomcat的情况下是代码修改生效。假设一个简单的Spring MVC Web项目已经通过eclipse部署到tomcat里。

### 1.1 源代码 ###

<code class="language-java hljs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">@Controller
 public class TaskController {
 
 @RequestMapping(value = "/task", method = RequestMethod.GET)
 public ModelAndView index() {
 
 logger.debug("index()");
 
 ModelAndView model = new ModelAndView();
 model.setViewName("index");
 return model;
 
 }
 
 ......</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li></ul>

访问 : [http://localhost:8080/project/task][http_localhost_8080_project_task]

> //output   
> DEBUG c.m.o.web.controller.TaskController - index()

### 1.2 修改代码，添加一些日志 ###

<code class="language-java hljs has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">@Controllerpublic class TaskController {
 
 @RequestMapping(value = "/task", method = RequestMethod.GET)
 public ModelAndView index() {
 
 logger.debug("index() - NEW - NO RESTART");
 
 ModelAndView model = new ModelAndView();
 model.setViewName("index");
 return model;
 
 }
 ......</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li></ul>

再次访问：[http://localhost:8080/project/task][http_localhost_8080_project_task]

> //output   
> DEBUG c.m.o.web.controller.TaskController - index() - NEW - NO RESTART

## 2. 在eclipse里面配置热部署 ##

双击tomcat，打开tomcat的配置界面，按如下几个步骤配置eclipse热部署：   
![这里写图片描述][20160729202227123]

### 2.1 单击“Overview”选项卡 ###

#### 2.1.1 展开“Server Options”，勾选“Serve modules without publishing”选项 ####

![这里写图片描述][20160729201951322]

#### 2.1.2 展开”publishing“，勾选”Automatically publish when resources change“选项。这个配置是用来热部署资源，如：JSP，XML和properties文件等。 ####

![双击tomcat][tomcat 1]   
![勾选自动发布当资源改变时][20151128195152519]

### 2.2 单击”Modules“选项卡，确保”Auto Reload“是被禁用的 ###

![设置][20151128201200213]

### 2.4 以DEBUG模式启动tomcat，热部署在DEBUG模式下才可用 ###

## 3. 限制 ##

热部署只支持方法内代码的修改，如果添加了新的类或方法依然需要重启才能生效。   
为了模拟这种情况，尝试添加了一个新方法，弹出了提示框，JVM不能热切换这个修改的代码。   
![替换失败][20151128202639137]

顶

踩

[eclipse_tomcat_web]: http://blog.csdn.net/zhang854429783/article/details/50086923
[eclipse]: http://www.csdn.net/tag/eclipse
[hot-deploy]: http://www.csdn.net/tag/hot-deploy
[tomcat]: http://www.csdn.net/tag/tomcat
[Link 1]: http://blog.csdn.net/zhang854429783/article/details/50086923#comments
[Link 2]: http://blog.csdn.net/zhang854429783/article/details/50086923#report
[category_icon.jpg]: /images/20220717/ba493825aa77468286d317846dc45037.png
[arrow_triangle_20_down.jpg]: /images/20220717/472094e4050c48d280b03b426e337cef.png
[Link 3]: http://blog.csdn.net/zhang854429783/article/details/50086923#
[eclipse 1]: http://blog.csdn.net/zhang854429783/article/details/50086923#t0
[Link 4]: http://blog.csdn.net/zhang854429783/article/details/50086923#t1
[1]: http://blog.csdn.net/zhang854429783/article/details/50086923#t2
[2]: http://blog.csdn.net/zhang854429783/article/details/50086923#t3
[eclipse 2]: http://blog.csdn.net/zhang854429783/article/details/50086923#t4
[1 _Overview]: http://blog.csdn.net/zhang854429783/article/details/50086923#t5
[11 _Server Options_Serve modules without publishing]: http://blog.csdn.net/zhang854429783/article/details/50086923#t6
[12 _publishing_Automatically publish when resources change_JSPXML_properties]: http://blog.csdn.net/zhang854429783/article/details/50086923#t7
[2 _Modules_Auto Reload]: http://blog.csdn.net/zhang854429783/article/details/50086923#t8
[4 _DEBUG_tomcat_DEBUG]: http://blog.csdn.net/zhang854429783/article/details/50086923#t9
[Link 5]: http://blog.csdn.net/zhang854429783/article/details/50086923#t10
[http_localhost_8080_project_task]: http://localhost:8080/project/task
[20160729202227123]: /images/20220717/a77c6494719b460e95fde4f3cc064d7f.png
[20160729201951322]: /images/20220717/944f612c91754a44a41646e7a01610c9.png
[tomcat 1]: /images/20220717/7ebf07ff9ddb4db6abf854497e515c8e.png
[20151128195152519]: /images/20220717/bfc84773f1834faba92983445735142b.png
[20151128201200213]: /images/20220717/abec01aac3be4353ac6f90796e26aa4d.png
[20151128202639137]: /images/20220717/8955bd89e1eb42e5981166ab6570a0da.png