Go语言视频零基础入门到精通

吴会

package com;

import javax.Servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class DownloadServlet extends HttpServlet {
  public void doGet(HttpServletRequest request,HttpServletResponse response)
         throws ServletException, IOException {
    ServletOutputStream out; //输出响应正文的输出流
    InputStream in;  //读取本地文件的输入流
    //获得filename哀求参数
    String filename=request.getParameter("filename");   
    if(filename==null){
      out=response.getOutputStream();
      out.write(&quotlease input filename.".getBytes());
      out.close();
      return;
    }
   
    //创建读取本地文件的输入流
    in= getClass().getResourceAsStream("/store/"+filename);
   
    int length=in.available();
    //设置响应正文的MIME类型
    response.setContentType("application/force-download");
    response.setHeader("Content-Length",String.valueOf(length));
    response.setHeader("Content-Disposition", "attachment;filename=\""+filename +"\" ");
   
    /** 把本地文件中的数据发送给客户 */
    out=response.getOutputStream();
    int bytesRead = 0;
    byte[] buffer = new byte[512];
    while ((bytesRead = in.read(buffer)) != -1){
      out.write(buffer, 0, bytesRead);
    }
      
    in.close();
    out.close();
  }
}

javalearner

谢谢楼主分享。