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
1 <!-- 定义文件上传解析器 --> 2 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 3 <property name="maxUploadSize" value="-1"/><!-- -1代表不限制文件大小，单位是B --> 4 <property name="defaultEncoding" value="utf-8"/><!-- 设置字符集编码 --> 5 <property name="maxInMemorySize" value="1024"/><!-- 内存中最大内存空间，单位是B NO KB --> 6 </bean>
控制器：
1 package com.cy.springannotation.controller; 2 3 import java.io.File; 4 5 import javax.servlet.http.HttpServletRequest; 6 7 import org.apache.log4j.Logger; 8 import org.springframework.stereotype.Controller; 9 import org.springframework.web.bind.annotation.RequestMapping; 10 import org.springframework.web.bind.annotation.RequestMethod; 11 import org.springframework.web.bind.annotation.RequestParam; 12 import org.springframework.web.multipart.commons.CommonsMultipartFile; 13 14 @Controller 15 public class FileUploadController { 16 private Logger log = Logger.getLogger(this.getClass()); 17 18 19 /** 20 * CommonsMultipartFile file 21 * @param file 22 * @return 23 */ 24 @RequestMapping(value="/upload.do",method=RequestMethod.POST) 25 public String upload(@RequestParam("fileName") CommonsMultipartFile file,HttpServletRequest req){ 26 //获取原始文件名 27 String fileName = file.getOriginalFilename(); 28 log.info(fileName); 29 String path = req.getSession().getServletContext().getRealPath("upload"); 30 try { 31 file.getFileItem().write(new File(path + File.separator + fileName)); 32 } catch (Exception e) { 33 34 log.error(e); 35 } 36 return "success"; 37 } 38 39 }
上传文件页面：
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>文件上传</title> 13 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19 <!-- 20 <link rel="stylesheet" type="text/css" href="styles.css"> 21 --> 22 23 </head> 24 25 <body> 26 <form action="upload.do" method="post" enctype="multipart/form-data"> 27 <table> 28 <tr> 29 <td><input type="file" name="fileName"/></td> 30 </tr> 31 <tr> 32 <td><input type="submit" value="提交"/></td> 33 </tr> 34 </table> 35 </form> 36 37 </body> 38 </html>
上传文件就可以了！