文件的下载

 1 import java.io.FileInputStream;
 2 import java.io.IOException;
 3 import java.io.InputStream;
 4 import java.io.OutputStream;
 5 import java.net.URLEncoder;
 6 
 7 import javax.servlet.ServletException;
 8 import javax.servlet.http.HttpServlet;
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 
12 /**
13  * Servlet implementation class DownloadServlet
14  */
15 public class DownloadServlet extends HttpServlet {
16     private static final long serialVersionUID = 1L;
17 
18     /**
19      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
20      */
21     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
22         response.setContentType("application/x-msdownload"); 
23         
24         String fileName = "文件下载.pptx";
25         response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
26         
27         OutputStream out = response.getOutputStream();
28         String pptFileName = "C:\\Users\\Think Pad\\Desktop\\__正在上课__\\JavaWEB_监听器.pptx";
29         
30         InputStream in = new FileInputStream(pptFileName);
31         
32         byte [] buffer = new byte[1024];
33         int len = 0;
34         
35         while((len = in.read(buffer)) != -1){
36             out.write(buffer, 0, len);
37         }
38         
39         in.close();
40     }
41 
42 }