SpringMVC-15-(文档管理系统---文件管理+拦截器）

淩亂°似流年 2022-03-07 01:10 185阅读 0赞

# 6.文件管理 #

## 1.文件管理查询 ##

1.修改Attachment  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70]  
2.修改AttachmentMapper  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 1]  
3.修改AttachmentMapper.xml  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 2]

4.创建AttachmentVo  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 3]  
5.创建AttachmentService  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 4]  
**6.创建AttachmentServiceImpl**

@Service
    public class AttachmentServiceImpl implements AttachmentService{
        
    	
    	@Autowired
    	private AttachmentMapper attachmentMapper;
    	@Override
    	public List<Attachment> queryAllAttachmentForPage(AttachmentVo attachmentVo,
    			PageBean pageBean) {
        
    		Page<Object> page=PageHelper.startPage(pageBean.getCurrentPage(), 
    		pageBean.getPageSize());
    		List<Attachment> list=this.attachmentMapper.queryAllAttachment(attachmentVo);
    		pageBean.setTotalCount(page.getTotal());
    		return list;
    	}
    	@Override
    	public void addAttachment(AttachmentVo attachmentVo) {
        
    		this.attachmentMapper.insertSelective(attachmentVo);
    	}
    	@Override
    	public void updateAttachment(AttachmentVo attachmentVo) {
        
    		this.attachmentMapper.updateByPrimaryKeySelective(attachmentVo);
    		
    	}
    	@Override
    	public void deleteAttachment(Integer fid) {
        
    		this.attachmentMapper.deleteByPrimaryKey(fid);
    	}
    	@Override
    	public Attachment queryAttachmentById(Integer fid) {
        
    		return this.attachmentMapper.selectByPrimaryKey(fid);
    	}
    
    }

7.创建AttachmentController  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 5]  
8.修改WEB-INF/view/index.jsp  
![在这里插入图片描述][20190315213820959.png]  
9.创建WEB-INF/view/attachment/list.jsp  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 6]

## 2.文件管理上传 ##

1.修改WEB-INF/attachment/list.jsp  
![在这里插入图片描述][20190315213833500.png]  
2.创建WEB-INF/attachment/add.jsp  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0MDEzNzkw_size_16_color_FFFFFF_t_70 7]

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
    <%
    	String path = request.getContextPath();
    	String basePath = request.getScheme() + "://"
    			+ request.getServerName() + ":" + request.getServerPort()
    			+ path + "/";
    %>
    <!DOCTYPE html>
    <html lang="zh-cn">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, 
    initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <meta name="renderer" content="webkit">
    <title>文件上传</title>
     <link rel="stylesheet" href="${ctx }/resources/css/pintuer.css">
        <link rel="stylesheet" href="${ctx }/resources/css/admin.css">
        <script src="${ctx }/resources/js/jquery.js"></script>
        <script src="${ctx }/resources/js/pintuer.js"></script>  
    </head>
    <body>
    <div class="panel admin-panel margin-top">
      <div class="panel-head" id="add"><strong><span class="icon-pencil-square-o">
      </span>添加内容</strong></div>
      <div class="body-content">
        <form method="post" class="form-x" action="${ctx }/attachment/addAttachment.action" 
        enctype="multipart/form-data">
          <div class="form-group">
            <div class="label">
              <label>文件标签：</label>
            </div>
            <div class="button-group border-main checkbox">
             <label class="button active">
    						<input name="fmark" value="逗逼" type="checkbox" checked="checked">逗逼
    					</label>
    					<label class="button">
    						<input name="fmark" value="搞笑" type="checkbox">搞笑
    					</label>
    					<label class="button">
    						<input name="fmark" value="严肃" type="checkbox">严肃
    					</label>
    					<label class="button">
    						<input name="fmark" value="工作" type="checkbox">工作
    					</label>
    					<label class="button">
    						<input name="fmark" value="回忆" type="checkbox">回忆
    					</label>
            </div>
          </div>
          <div class="form-group">
            <div class="label">
              <label>所属文件夹：</label>
            </div>
            <div class="field">
              <select name="tid" class="input w80" style="line-height:17px;" 
              onchange="changesearch()">
                  <c:forEach var="sn" items="${folders }">
                  	<option value="${sn.tid }">${
        sn.tname }</option>
                  </c:forEach>
                </select> 
            </div>
          </div> 
          <div class="form-group">
            <div class="label">
              <label>选择文件：</label>
            </div>
            <div class="field">
            	<button class="button bg-main icon-check-square-o" id="addFile" type="button"> 
            	添加一行</button>
            </div>
          </div>
          <div class="form-group">
            <div class="label">
            </div>
            <div class="field" id="myfile">
             	<div><a class="button input-file bg-green" href="javascript:void(0);">+ 浏览文件
             	<input size="100" type="file" name="mf" /></a>
             <a class="button input-file bg-red" href="javascript:void(0);"
              onclick="del(this)"> 删除</a>
             </div>
            </div>
          </div>
          <div class="form-group">
            <div class="label">
              <label></label>
            </div>
            <div class="field">
              <button class="button bg-main icon-check-square-o" type="submit"> 提交</button>
            </div>
          </div>
        </form>
      </div>
    </div>
    <script type="text/javascript">
    
    		$("#addFile").click(function(){
        
    			var html='<div><a class="button input-file bg-green" href="javascript:void(0);">
    			+ 浏览文件<input size="100" type="file" name="mf" /></a>
    			+  <a class="button input-file bg-
    			red" onclick="del(this)"> 删除</a><div>'
    			$("#myfile").append(html);
    		});
    		
    		function del(obj){
        
    			obj.parentElement.remove();
    		}
    </script>
    </body>
    </html>

**3.修改AttachmentController**

/**
    	 * 跳转到添加页面
    	 */
    	@RequestMapping("toAddAttachment")
    	public String toAddAttachment(HttpSession session, Model model) {
        
    		User user = (User) session.getAttribute("user");
    		// 根据用户ID查询文件夹列表
    		List<Folder> folders = folderService.queryAllFolderByUidForList(user
    				.getUid());
    		model.addAttribute("folders", folders);
    		return "attachment/add";
    	}
    
    	/**
    	 * 添加
    	 */
    	@RequestMapping("addAttachment")
    	public String toAddAttachment(MultipartFile[] mf, HttpSession session
    	,AttachmentVo attachmentVo) {
        
    		// 1,得到文件上传的目录
    		String realPath = session.getServletContext().getRealPath("/upload");
    		// 2,得到文件夹的名字
    		String dirName = RandomUtils.createDirNameUserDate();
    		// 3,构造文件夹对象
    		File dirFile = new File(realPath, dirName);
    		// 4,判断文件夹是否存在
    		if (!dirFile.exists()) {
        
    			dirFile.mkdirs();// 创建文件夹
    		}
    		for (int i = 0; i < mf.length; i++) {
        
    			// 5,得到文件名
    			String oldName = mf[i].getOriginalFilename();
    			// 6,生成新的文件名
    			String newName = RandomUtils.createFileNameUseTime(oldName);
    			// 7,构造文件对象
    			File file = new File(dirFile, newName);
    			// 5,上传文件
    			try {
        
    				mf[i].transferTo(file);
    				attachmentVo.setFoldname(oldName);
    				attachmentVo.setFcontenttype(mf[i].getContentType());
    				attachmentVo.setFcreatetime(new Date());
    				attachmentVo.setFsize(Double.valueOf(mf[i].getSize()));
    				// 存放相对路径
    				attachmentVo.setFpath("upload/" + dirName + "/" + newName);
    				// 说明文件上传成功
    				attachmentService.addAttachment(attachmentVo);
    			} catch (Exception e) {
        
    				e.printStackTrace();
    			}
    		}
    		return "redirect:loadAllAttachment.action";
    	}

**3.文件管理下载**  
在AttachmentController中加入下载的方法

/**
    	 * 下载
    	 */
    	@RequestMapping("downloadAttachment")
    	public ResponseEntity downloadAttachment(AttachmentVo attachmentVo)throws Exception{
        
    	
    		Attachment attachment = attachmentService.queryAttachmentByFid(attachmentVo.getFid());
    		String fpath = attachment.getFpath();
    		String oldName = attachment.getFoldname();
    		String realPath = WebUtils.getServletContext().getRealPath("/");
    		String ablPath=realPath+"/"+fpath;
    		File file=new File(ablPath);
    		if(file.exists()){
        
    			byte[] bytes=FileUtils.readFileToByteArray(file);
    			HttpHeaders header=new HttpHeaders();
    			header.setContentType(MediaType.APPLICATION_OCTET_STREAM);
    			
    			String filename = URLEncoder.encode(oldName, "UTF-8");
    			header.setContentDispositionFormData("attachment", filename);
    			ResponseEntity entity = new ResponseEntity(bytes, header,
    					HttpStatus.CREATED);
    			
    			
    			return entity;
    		} else {
        
    			PrintWriter out = WebUtils.getCurrentHttpServletResponse().getWriter();
    			out.write("file not found");
    			out.flush();
    			out.close();
    		}
    		return null;
    	}

最后改变jsp里面地址即可

**4.文件管理删除**  
在AttachmentController中加入删除的方法

/**
    	 * 删除
    	 */
    	@RequestMapping("deleteAttachment")
    	public String deleteAttachment(AttachmentVo attachmentVo) {
        
    		this.attachmentService.deleteAttachment(attachmentVo.getFid());
    		return "redirect:loadAllAttachment.action";
    	}

最后修改jsp里面网页地址

# 二、拦截器 #

servlet里面的过滤器 url-patten /\* 默认拦截所有求  
|–请求servlet  
|–请求 静态资源文件

springmvc里面的拦截器只会拦截 controller  
只能经过前端控制器的请求才有可能进入拦截器

## 创建拦截器 ##

/**
     * 拦截器
     * @author LJH
     *
     */
    public class SessionInteceptor implements HandlerInterceptor{
        
    
    	/**
    	 * 确定是否拦截的回调方法
    	 * 返回值boolean      
    	 * 		|--true  代表放行
    	 * 		|--false 拦截
    	 */
    	@Override
    	public boolean preHandle(HttpServletRequest request,
    			HttpServletResponse response, Object handler) throws Exception {
        
    		
    		System.out.println("preHandle");
    		Object object = request.getSession().getAttribute("user");
    		if(null!=object){
        
    			return true;
    		}
    		//跳转到登陆页面
    		response.sendRedirect("index.jsp");
    		return false;
    	}
    
    	/**
    	 * 当Controller里面的方法执行完成之后回调的方法
    	 * @param request
    	 * @param response
    	 * @param handler 当前请求的Controller的对象
    	 * @param modelAndView   就是Controller里面的方法执行完成之后要
    	 * 交给视图解析器去解析的ModelAndView对象
    	 */
    	@Override
    	public void postHandle(HttpServletRequest request,
    			HttpServletResponse response, Object handler,
    			ModelAndView modelAndView) throws Exception {
        
    		System.out.println("postHandle--"+modelAndView.getViewName());
    	}
    
    	/**
    	 * postHandle方法执行完成之后回调方法
    	 */
    	@Override
    	public void afterCompletion(HttpServletRequest request,
    			HttpServletResponse response, Object handler, Exception ex)
    			throws Exception {
        
    		System.out.println("afterCompletion");
    		
    	}
    }

## 配置拦截器 ##

<mvc:interceptors>
    		
    		<mvc:interceptor>
    			
    			<mvc:mapping path="/**"/>
    			
    			<mvc:exclude-mapping path="/login/toLogin*"/>
    			<mvc:exclude-mapping path="/login/login*"/>
    			
    			<bean class="com.sxt.inteceptor.SessionInteceptor"></bean>
    		</mvc:interceptor>
    	</mvc:interceptors>

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[20190315213820959.png]: /images/20220307/25471e8f8e614e5998fca7262e489369.png
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[20190315213833500.png]: /images/20220307/8cfd05d04a9441c4927a9c66d5ace3e0.png
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