<?xml version="1.0" encoding="UTF-8"?>      <web-app version="2.5"           xmlns="http://java.sun.com/xml/ns/javaee"           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"           xsi:schemaLocation="http://java.sun.com/xml/ns/javaee           http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">        <servlet>              <servlet-name>upload</servlet-name>              <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>              <load-on-startup>1</load-on-startup>          </servlet>          <servlet-mapping>              <servlet-name>upload</servlet-name>              <url-pattern>/</url-pattern>          </servlet-mapping>                <filter>              <filter-name>SpringCharacterEncodingFilter</filter-name>              <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>              <init-param>                  <param-name>encoding</param-name>                  <param-value>UTF-8</param-value>              </init-param>          </filter>          <filter-mapping>              <filter-name>SpringCharacterEncodingFilter</filter-name>              <url-pattern>/*</url-pattern>          </filter-mapping>                    <welcome-file-list>              <welcome-file>/WEB-INF/jsp/user/add.jsp</welcome-file>          </welcome-file-list>      </web-app>  

    <?xml version="1.0" encoding="UTF-8"?>      <beans xmlns="http://www.springframework.org/schema/beans"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xmlns:mvc="http://www.springframework.org/schema/mvc"          xmlns:context="http://www.springframework.org/schema/context"          xsi:schemaLocation="http://www.springframework.org/schema/beans                               http://www.springframework.org/schema/beans/spring-beans-3.0.xsd                              http://www.springframework.org/schema/mvc                              http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd                              http://www.springframework.org/schema/context                               http://www.springframework.org/schema/context/spring-context-3.0.xsd">          <context:component-scan base-package="com.jadyer"/>                    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">              <property name="prefix" value="http://www.mamicode.com/WEB-INF/jsp/"/>              <property name="suffix" value="http://www.mamicode.com/.jsp"/>          </bean>                    <!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 -->          <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">              <property name="defaultEncoding" value="http://www.mamicode.com/UTF-8"/>              <!-- 指定所上传文件的总大小不能超过200KB。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 -->              <property name="maxUploadSize" value="http://www.mamicode.com/200000"/>          </bean>                    <!-- SpringMVC在超出上传文件限制时，会抛出org.springframework.web.multipart.MaxUploadSizeExceededException -->          <!-- 该异常是SpringMVC在检查上传的文件信息时抛出来的，而且此时还没有进入到Controller方法中 -->          <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">              <property name="exceptionMappings">                  <props>                      <!-- 遇到MaxUploadSizeExceededException异常时，自动跳转到/WEB-INF/jsp/error_fileupload.jsp页面 -->                      <prop key="org.springframework.web.multipart.MaxUploadSizeExceededException">error_fileupload</prop>                  </props>              </property>          </bean>      </beans>  

    <%@ page language="java" pageEncoding="UTF-8"%>      <form action="<%=request.getContextPath()%>/user/add" method="POST" enctype="multipart/form-data">          username: <input type="text" name="username"/><br/>          nickname: <input type="text" name="nickname"/><br/>          password: <input type="password" name="password"/><br/>          yourmail: <input type="text" name="email"/><br/>          yourfile: <input type="file" name="myfiles"/><br/>          yourfile: <input type="file" name="myfiles"/><br/>          yourfile: <input type="file" name="myfiles"/><br/>          <input type="submit" value="http://www.mamicode.com/添加新用户"/>      </form>  

    <%@ page language="java" pageEncoding="UTF-8"%>      <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>      <c:forEach items="${users}" var="user">          ${user.value.username}----${user.value.nickname}----${user.value.password}----${user.value.email}              <a href="http://www.mamicode.com//user/${user.value.username}">查看</a>              <a href="http://www.mamicode.com//user/${user.value.username}/update">编辑</a>              <a href="http://www.mamicode.com//user/${user.value.username}/delete">删除</a>          <br/>      </c:forEach>      <br/>      <a href="http://www.mamicode.com//user/add">继续添加用户</a>  

<%@ page language="java" pageEncoding="UTF-8"%>  <h1>文件过大，请重新选择</h1> 

    package com.jadyer.model;            /**      * User      * @author 宏宇      * @create May 12, 2012 1:24:43 AM      */      public class User {          private String username;          private String nickname;          private String password;          private String email;          /*==四个属性的getter()、setter()略==*/          public User() {}          public User(String username, String nickname, String password, String email) {              this.username = username;              this.nickname = nickname;              this.password = password;              this.email = email;          }      }  

    package com.jadyer.controller;            import java.io.File;      import java.io.IOException;      import java.util.HashMap;      import java.util.Map;            import javax.servlet.http.HttpServletRequest;            import org.apache.commons.io.FileUtils;      import org.springframework.stereotype.Controller;      import org.springframework.ui.Model;      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.MultipartFile;            import com.jadyer.model.User;            /**      * SpringMVC中的文件上传      * @see 第一步：由于SpringMVC使用的是commons-fileupload实现，故将其组件引入项目中      * @see       这里用到的是commons-fileupload-1.2.2.jar和commons-io-2.0.1.jar      * @see 第二步：在####-servlet.xml中配置MultipartResolver处理器。可在此加入对上传文件的属性限制      * @see 第三步：在Controller的方法中添加MultipartFile参数。该参数用于接收表单中file组件的内容      * @see 第四步：编写前台表单。注意enctype="multipart/form-data"以及<input type="file" name="****"/>      * @author 宏宇      * @create May 12, 2012 1:26:21 AM      */      @Controller      @RequestMapping("/user")      public class UserController {          private final static Map<String,User> users = new HashMap<String,User>();                    //模拟数据源,构造初始数据          public UserController(){              users.put("张起灵", new User("张起灵", "闷油瓶", "02200059", "menyouping@yeah.net"));              users.put("李寻欢", new User("李寻欢", "李探花", "08866659", "lixunhuan@gulong.cn"));              users.put("拓拔野", new User("拓拔野", "搜神记", "05577759", "tuobaye@manhuang.cc"));              users.put("孙悟空", new User("孙悟空", "美猴王", "03311159", "sunhouzi@xiyouji.zh"));          }                    @RequestMapping("/list")          public String list(Model model){              model.addAttribute("users", users);              return "user/list";          }                    @RequestMapping(value="http://www.mamicode.com/add", method=RequestMethod.GET)          public String addUser(){              return "user/add";          }          @RequestMapping(value="http://www.mamicode.com/add", method=RequestMethod.POST)          public String addUser(User user, @RequestParam MultipartFile[] myfiles, HttpServletRequest request) throws IOException{              //如果只是上传一个文件，则只需要MultipartFile类型接收文件即可，而且无需显式指定@RequestParam注解              //如果想上传多个文件，那么这里就要用MultipartFile[]类型来接收文件，并且还要指定@RequestParam注解              //并且上传多个文件时，前台表单中的所有<input type="file"/>的name都应该是myfiles，否则参数里的myfiles无法获取到所有上传的文件              for(MultipartFile myfile : myfiles){                  if(myfile.isEmpty()){                      System.out.println("文件未上传");                  }else{                      System.out.println("文件长度: " + myfile.getSize());                      System.out.println("文件类型: " + myfile.getContentType());                      System.out.println("文件名称: " + myfile.getName());                      System.out.println("文件原名: " + myfile.getOriginalFilename());                      System.out.println("========================================");                      //如果用的是Tomcat服务器，则文件会上传到\\%TOMCAT_HOME%\\webapps\\YourWebProject\\WEB-INF\\upload\\文件夹中                      String realPath = request.getSession().getServletContext().getRealPath("/WEB-INF/upload");                      //这里不必处理IO流关闭的问题，因为FileUtils.copyInputStreamToFile()方法内部会自动把用到的IO流关掉，我是看它的源码才知道的                      FileUtils.copyInputStreamToFile(myfile.getInputStream(), new File(realPath, myfile.getOriginalFilename()));                  }              }              users.put(user.getUsername(), user);              return "redirect:/user/list";          }      }