使用Servlet实现下载文件的功能

在前台有一个下载链接，比如

<a href="DownLoadServlet">下载</a> <br/>
使用Servlet实现下载：

import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.net.URLEncoder; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class DownLoadServlet extends HttpServlet { public DownLoadServlet() { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //处理请求 //读取要下载的文件 File f = new File("E:/好久不见.mp3"); if(f.exists()){ FileInputStream fis = new FileInputStream(f); String filename=URLEncoder.encode(f.getName(),"utf-8"); //解决中文文件名下载后乱码的问题 byte[] b = new byte[fis.available()]; fis.read(b); response.setCharacterEncoding("utf-8"); response.setHeader("Content-Disposition","attachment; filename="+filename+""); //获取响应报文输出流对象 ServletOutputStream out =response.getOutputStream(); //输出 out.write(b); out.flush(); out.close(); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }

配置文件注意路径。。。