java--超鏈接下載

package com.test;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Demo_1 extends HttpServlet {

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String filename =request.getParameter("filename");
String path = getServletContext().getRealPath("download/filename");
InputStream is=new FileInputStream(path);
OutputStream os=response.getOutputStream();
int len =0;
byte[] buffer=new byte[1024];
while((len =is.read(buffer)) != -1) {
os.write(buffer,0,len);
}
}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

doGet(request, response);
}

}