建立Controller：
1 package com.yas.controller; 2 3 import org.apache.commons.io.IOUtils; 4 import org.springframework.stereotype.Controller; 5 import org.springframework.web.bind.annotation.RequestMapping; 6 import org.springframework.web.bind.annotation.RequestParam; 7 8 import javax.servlet.http.HttpServletResponse; 9 import javax.servlet.http.HttpSession; 10 import java.io.FileInputStream; 11 import java.io.IOException; 12 13 @Controller 14 @RequestMapping("/download") 15 public class DownloadController { 16 17 @RequestMapping("/test1") 18 public void test1(@RequestParam("name") String name, HttpSession session, HttpServletResponse response) throws IOException { 19 String realPath = session.getServletContext().getRealPath("/upload"); 20 String filePath = realPath + "\\" + name; 21 response.setHeader("content-disposition", "attachment;filename=" + name); 22 IOUtils.copy(new FileInputStream(filePath), response.getOutputStream()); 23 } 24 }
IOUtils，所在的包是org.apache.commons.io.IOUtils，在上一篇文章中，已经在pom文件中添加了此依赖。
建立测试jsp页面：
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <a href="${pageContext.request.contextPath}/download/test1?name=readme.txt">下载</a> </body> </html>