SpringMVC File Upload 多文件上传

web.xml

	

	
    contextConfigLocation
    /WEB-INF/classes/spring-MVC.xml
  
	
		org.springframework.web.context.ContextLoaderListener
	
	
	  
     springMvc
     org.springframework.web.servlet.DispatcherServlet
     
        contextConfigLocation
        /WEB-INF/classes/spring-MVC.xml
     
     1
  
  
  
     springMvc
     /
  
  
	
		index.jsp
	

spring-MVC.xml

 

	 
     
    
     
         
         
     
    
     
     
         
         
     
     
     
     
     
         
             
                 
                error_fileupload 
             
         
     
    
	
	
	
    

FileUploadController.java

package com.geloin.spring.controller;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;

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.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import com.geloin.spring.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
 * @author 宏宇
 * @create May 12, 2012 1:26:21 AM
 */ 
@Controller 
@RequestMapping("/user") 
public class FileUploadController { 
    private final static Map users = new HashMap(); 
     
    //模拟数据源,构造初始数据 
    public FileUploadController(){ 
        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, MultipartHttpServletRequest request, HttpServletResponse response) 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 
    	Iterator itr =  request.getFileNames();
    	MultipartFile myfile = null;
    	 
        //2. get each file
        while(itr.hasNext()){

            //2.1 get next MultipartFile
        	myfile = request.getFile(itr.next()); 
            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"; 
    } 
    
} 

User.java

package com.geloin.spring.model;
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; 
    }
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getNickname() {
		return nickname;
	}
	public void setNickname(String nickname) {
		this.nickname = nickname;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	} 
    
    
} 

upload.jsp

<%@ page language="java" pageEncoding="UTF-8"%>