1.配置web.xml

     
       
            
          
       
        index.jsp
         
          
        
            
       
        mvc62
             
       
        org.springframework.web.servlet.DispatcherServlet
             
                 
        
         contextConfigLocation
                  
        
         classpath:mvc62.xml
              
             
             
       
        1
         
        
            
       
        mvc62
             
       
        /
         
          
        
            
       
        encoding62
             
       
        org.springframework.web.filter.CharacterEncodingFilter
             
             
                 
        
         encoding
                  
        
         utf-8
              
         
        
            
       
        encoding62
             
       
        /*
         
      
     

2.配置SpringMVC.xml

     
     
         
          
          
          
              
                   
                        
                             
           
            
           
            application/json
            
                          
                     
                
           
          
          
              
               
           
          
           
                
           
                
           
           
               
                    
                     
                     
                     
                     
                     
                     
                     
                 
                
                    
                     
                     
                     
                 
            
           
           
               
                
            
           
            
              
                   
                          
                         
         
          no
                           
         
          105,179,90
                           
         
          20
                         
         
          black
                           
         
          200
                           
         
          50
                           
         
          40
                           
         
          code61
                           
         
          4
                           
         
          Arial,Courier
                        
                     
                  
           
      
     

3.配置控制器

package com.c61.controller;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.net.URLEncoder;import java.util.Map;import java.util.UUID;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.apache.commons.io.FilenameUtils;import org.apache.commons.io.IOUtils;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.multipart.MultipartFile;@Controller@RequestMapping("/down")public class DownLoadController {    //通过MultipartFile接收文件    @RequestMapping("/test")    public String testDown(String name,HttpSession s,HttpServletResponse res) throws FileNotFoundException, IOException{        String path=s.getServletContext().getRealPath("/up61");        String filePath=path+File.separator+name;        //如果文件名中有中文：        String name2=URLEncoder.encode(name, "utf-8");        System.out.println(name2);        //设置响应头，实现附件形式下载文件        res.setHeader("content-disposition", "attachment;filename="+name2);        //输入流读取所有字节，输出流将所有读取到的字节写出        IOUtils.copy(new FileInputStream(filePath),res.getOutputStream());        return null;//如上语句，已经响应了请求，则必须return null;    }}

4.配置视图

View ： download.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>                  
         
         
             
         
         
                 免费下载  

 

下载 

1 定制超链接

<a href="${pageContext.request.contextPath}/down/test?name=html教程全.ppt">免费下载</a>

2 定制下载的Controller

public String testDown(String name,HttpSession s,HttpServletResponse res) throws FileNotFoundException, IOException{    String path=s.getServletContext().getRealPath("/up61");    String filePath=path+File.separator+name;    //如果文件名中有中文：    String name2=URLEncoder.encode(name, "utf-8");    //设置响应头，实现附件形式下载文件(告知浏览器，需要以附件形式接收)    res.setHeader("content-disposition", "attachment;filename="+name2);    //输入流读取所有字节，输出流将所有读取到的字节写出    IOUtils.copy(new FileInputStream(filePath),res.getOutputStream());    return null;//如上语句，已经响应了请求，则必须return null;}