JSP流的方式下载文件

 

<%@ page import="java.io.*" %>
<% 
// example: 
// <a href="download.JSP?path=img/&name=test.gif">download image</a> 

String root = getServletContext().getRealPath("/"); 
String path = request.getParameter("path"); 
String name = request.getParameter("name"); 
System.out.println(root + path + name);

response.setContentType("unknown"); 
response.addHeader("Content-Disposition", "attachment;filename=\"" + name + "\""); 

try 
%>