JavaWeb---设置content-disposition响应头，让浏览器下载文件

package com.zyz;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Created by Administrator on 16-9-29.
 */
public class DownImgServlet extends HelloServlet {
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) {
        response.setHeader("Content-disposition","attachment;filename=photo.jpg");
        InputStream in=this.getServletContext().getResourceAsStream("/images/i.jpeg");
        byte buffer[]=new byte[1024];//设置缓冲区
        int len=0;
        try {
            OutputStream out=response.getOutputStream();
            while((len=in.read(buffer))>0){
            out.write(buffer,0,len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}