Java Servlet获得HTTP请求消息的内容

最新推荐文章于 2025-08-15 17:42:04 发布

原创最新推荐文章于 2025-08-15 17:42:04 发布 · 1k 阅读

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CC 4.0 BY-SA版权

文章标签：

#servlet #java #socket #input #thread #import

本文介绍了一个简单的Java网络编程实例，包括ServerAccept类监听8091端口接收客户端连接请求，以及ServerEchoRequest类处理请求并将内容记录到本地文件。此外，还提供了一个用于上传文件的JSP页面。

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两个java类一个jsp:

ServerAccept负责监听接口8091,当客户端与端口建立连接时，该类通过一个新线程启动ServerEchoRequest类处理请求内容，并保存在目录下的request.text中。

1.ServerAccept:

/**
*
* @author lucifer
*/
import java.net.*;
import java.io.*;

public class ServerAccept implements Runnable{
     final static int LISTEN_PORT = 8091;
     public void run(){
          ServerSocket server = null;
          try{
               server = new ServerSocket(LISTEN_PORT);
               System.out.println("正在等待连接");
          }
          catch(IOException e){
               System.out.println("不能连接到端口:" +
                       LISTEN_PORT + ":" +
                       e.getMessage());
               System.exit(0);
          }
          while(true){
               try{
                    new Thread(new ServerEchoRequest(server.accept())).start();
                    System.out.println("启用一个连接");
               }
               catch(IOException e){
                    System.out.println("不能接受数据:" + e.getMessage());
               }
          }
     }

     public static void main(String[] args){
          new Thread(new ServerAccept()).start();
     }
}

2.ServerEchoRequest:

/**
*
* @author lucifer
*/
import java.io.*;
import java.net.*;

public class ServerEchoRequest implements Runnable{
     Socket m_socket = null;
     final static int MAX_BUFF = 4000;
     private final static int TIMEOUT = 3000;

     public ServerEchoRequest(Socket socket)throws SocketException{
          m_socket = socket;
     }

     public void run(){
          try{
               getClient(m_socket);
          }
          catch(IOException e){
               System.out.println(e);
               System.exit(0);
          }
          catch(ClassNotFoundException ex){
               System.out.println(ex);
               System.exit(0);
          }
     }

     protected void getClient(Socket socket)throws IOException,ClassNotFoundException{
          DataInputStream in = new DataInputStream(m_socket.getInputStream());
          String s;
          File f =new File("request.text");
          PrintWriter fileout = new PrintWriter(new FileWriter(f));
          while((s = in.readLine())!=null){
               System.out.println(s);
               fileout.println(s);
               fileout.flush();
          }
     }
}

3.JSP页：

<%--
    Document   : index
    Created on : 2009-10-9, 19:13:43
    Author     : lucifer
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
         <form method="post" action="http://localhost:8091" enctype="multipart/form-data">
              <input type="text" name="fileID" size="20"><br>
              <input type="file" name="FileData" size="20"><br>
              <input type="submit" name="submitfile" value="Upload">
         </form>
    </body>
</html>