java中的Socket编程简单例子

注释: Socket-->亦称作"套接字",是java网络编程基础,用来描叙IP地址和端口。

        Socket:建立网络连接时使用.

        ServerSocket:用于服务器端.

 

   [一个简单的单线程的"Client-Server"例子]

    Server(服务器端):使用ServerSocket监听指定的端口,等待客户连接请求,客户连接后,会话产生.

    Client(客户端):使用Socket对服务器的端口发出连接请求,一旦连接成功,打开会话.

 

***********************Server********************

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

 

public class Server{

       public static void main(String []args){

                try{

                       ServerSocket ss = new ServerSocket(8099);

                       System.out.println("服务器已启动,等到客户端的连接...");

                       Socket socket = ss.accept();// -->服务器收到客户端的数据后,创建与此客户端对话的Socket  

                       DataInputStream in=new DataInputStream(socket.getInputStream());

                     // -->用于接收客户端 发来的数据的输入流

                      System.out.println("服务器接受到客户端的连接请求:"+in.readUTF());

                      DataOutputStream out = new DataOutputStream(socket.getOutputStream());

                      out.writeUTF("接受连接请求,连接成功");

                      socket.close();

                      ss.close();

                  }catch(Exception e){

                           e.printStackTrace(); }

              }

        }

 

*************************Client******************************

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.Socket;

public class Client{

             public static void main(String []args){

                    try{

                         Socket socket = new Socket("localhost",8099);

                         DataOutputStream out = new DataOutputStream(socket.getOutputStream());

                         out.writeUTF("客户端请求服务器的连接...");

                         DataInputStream in = new DataInputStream(socket.getInputStream());  

                         System.out.println(in.readUTF()); socket.close();

                    }catch(Exception e){

                           e.printStackTrace();

                 }

         }

     } //注释:8099-->自定义端口,最好大于1024均可