Spring MVC 之文件上传（七）

时间：2021-06-20 20:44:36
SpringMVC同样使用了apache的文件上传组件。所以需要引入以下包：

apache-commons-fileupload.jar

apache-commons-io.jar

在springAnnotation-servlet.xml中配置

 <!-- 定义文件上传解析器 -->

     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

         <property name="maxUploadSize" value="-1"/><!-- -1代表不限制文件大小，单位是B -->

         <property name="defaultEncoding"  value="utf-8"/><!-- 设置字符集编码 -->

         <property name="maxInMemorySize" value="1024"/><!-- 内存中最大内存空间，单位是B NO KB -->

     </bean>

控制器：

 package com.cy.springannotation.controller;

 import java.io.File;

 import javax.servlet.http.HttpServletRequest;

 import org.apache.log4j.Logger;

 import org.springframework.stereotype.Controller;

 import org.springframework.web.bind.annotation.RequestMapping;

 import org.springframework.web.bind.annotation.RequestMethod;

 import org.springframework.web.bind.annotation.RequestParam;

 import org.springframework.web.multipart.commons.CommonsMultipartFile;

 @Controller

 public class FileUploadController {

     private Logger log = Logger.getLogger(this.getClass());

     /**

      * CommonsMultipartFile file

      * @param file

      * @return

      */

     @RequestMapping(value="/upload.do",method=RequestMethod.POST)

     public String upload(@RequestParam("fileName") CommonsMultipartFile file,HttpServletRequest req){

         //获取原始文件名

         String fileName = file.getOriginalFilename();

         log.info(fileName);

         String path = req.getSession().getServletContext().getRealPath("upload");

         try {

             file.getFileItem().write(new File(path + File.separator + fileName));

         } catch (Exception e) {

             log.error(e);

         }

         return "success";

     }

 }

上传文件页面：

 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

 <%

 String path = request.getContextPath();

 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

 <html>

   <head>

     <base href="<%=basePath%>">

     <title>文件上传</title>

     <meta http-equiv="pragma" content="no-cache">

     <meta http-equiv="cache-control" content="no-cache">

     <meta http-equiv="expires" content="0">

     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

     <meta http-equiv="description" content="This is my page">

     <!--

     <link rel="stylesheet" type="text/css" href="styles.css">

     -->

   </head>

   <body>

    <form action="upload.do" method="post" enctype="multipart/form-data">

         <table>

             <tr>

                 <td><input type="file" name="fileName"/></td>

             </tr>

             <tr>

                 <td><input type="submit" value="提交"/></td>

             </tr>

         </table>

     </form>

   </body>

 </html>

上传文件就可以了！

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