昨天和今天了解了一下这个网络编程；

服务端

import java.io.*;
import java.net.*;public class TestServer {public static void main(String args[])throws Exception{ServerSocket ss = new ServerSocket(6666);while (true) {Socket s = ss.accept();System.out.println("A Client connect");DataInputStream dis = new DataInputStream(s.getInputStream());System.out.println(dis.readUTF());dis.close();s.close();}}
}

客户端

import java.io.*;
import java.net.Socket;public class TestClient {public static void main(String args[])throws  Exception{Socket s = new  Socket("127.0.0.1",6666);OutputStream os = s.getOutputStream();DataOutputStream dos = new DataOutputStream(os);Thread.sleep(3000);dos.writeUTF("hello server");dos.flush();dos.close();s.close();}
}

运行结果
TestServer:

A Client connect
hello server