jsp遠程調用資源圖片，以附件形式下載__js

<%@page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<%@page import="java.net.HttpURLConnection,java.net.URL"%>
<%@page import="java.io.*" %>
<%
 response.reset();
 //設定response header
 response.addHeader("Content-Disposition","attachment;filename=hello.jpg");
 response.setContentType("application/octet-stream");
 //response.setContentType("application/application/x-download");
 URL url = new URL("http://img.cdeledu.com/FAQ/2015/0611/1434007544046-0.jpg");
 HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 InputStream fis = conn.getInputStream();
 OutputStream outp = response.getOutputStream();
 byte[] b = new byte[1024];
 int i = 0;
 while ((i = fis.read(b)) > 0) {
  outp.write(b, 0, i);
 }
 outp.flush();
 out.clear();
 out = pageContext.pushBody();
 fis.close();
%>