SpringMVC中的文件上传
分类: SpringMVC 2012-05-17 12:55 26426人阅读 评论(13) 收藏 举报
这是用的是SpringMVC-3.1.1、commons-fileupload-1.2.2和io-2.0.1
首先是web.xml
[html] view plaincopyprint?
- <?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"?> <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>
接下来是SpringMVC的配置文件upload-servlet.xml
[html] view plaincopyprint?
- <?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="/WEB-INF/jsp/"/>
- <property name="suffix" value=".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="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="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>
<?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="/WEB-INF/jsp/"/> <property name="suffix" value=".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="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="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>
下面是用于上传的表单页面//WEB-INF//jsp//user//add.jsp
[html] view plaincopyprint?
- <%@ 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="添加新用户"/>
- </form>
<%@ 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="添加新用户"/> </form>
下面是上传成功后打印用户信息的页面//WEB-INF//jsp//user//list.jsp
[html] view plaincopyprint?
- <%@ 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="<%=request.getContextPath()%>/user/${user.value.username}">查看</a>
- <a href="<%=request.getContextPath()%>/user/${user.value.username}/update">编辑</a>
- <a href="<%=request.getContextPath()%>/user/${user.value.username}/delete">删除</a>
- <br/>
- </c:forEach>
- <br/>
- <a href="<%=request.getContextPath()%>/user/add">继续添加用户</a>
<%@ page language="java" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <c:forEach items="${users}" var="user"> ${user.value.username}----${user.value.nickname}----${user.value.password}----${user.value.email} <a href="<%=request.getContextPath()%>/user/${user.value.username}">查看</a> <a href="<%=request.getContextPath()%>/user/${user.value.username}/update">编辑</a> <a href="<%=request.getContextPath()%>/user/${user.value.username}/delete">删除</a> <br/> </c:forEach> <br/> <a href="<%=request.getContextPath()%>/user/add">继续添加用户</a>
下面是上传文件内容过大时的提示页面//WEB-INF//jsp//error_fileupload.jsp
[html] view plaincopyprint?
- <%@ page language="java" pageEncoding="UTF-8"%>
- <h1>文件过大,请重新选择</h1>
<%@ page language="java" pageEncoding="UTF-8"%> <h1>文件过大,请重新选择</h1>
接下来是用到的实体类User.java
[java] view plaincopyprint?
- 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.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; } }
最后是核心的UserController.java
[java] view plaincopyprint?
- 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", "[email protected]"));
- users.put("李寻欢", new User("李寻欢", "李探花", "08866659", "[email protected]"));
- users.put("拓拔野", new User("拓拔野", "搜神记", "05577759", "[email protected]"));
- users.put("孙悟空", new User("孙悟空", "美猴王", "03311159", "[email protected]"));
- }
- @RequestMapping("/list")
- public String list(Model model){
- model.addAttribute("users", users);
- return "user/list";
- }
- @RequestMapping(value="/add", method=RequestMethod.GET)
- public String addUser(){
- return "user/add";
- }
- @RequestMapping(value="/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";
- }
- }
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", "[email protected]")); users.put("李寻欢", new User("李寻欢", "李探花", "08866659", "[email protected]")); users.put("拓拔野", new User("拓拔野", "搜神记", "05577759", "[email protected]")); users.put("孙悟空", new User("孙悟空", "美猴王", "03311159", "[email protected]")); } @RequestMapping("/list") public String list(Model model){ model.addAttribute("users", users); return "user/list"; } @RequestMapping(value="/add", method=RequestMethod.GET) public String addUser(){ return "user/add"; } @RequestMapping(value="/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"; } }
补充:记得建立这个目录,用于存放上传的文件,即//WEB-INF//upload//
时间: 2024-10-11 16:01:44