【服务器端】

import java.io.IOException;

import java.io.InputStream;

import java.net.ServerSocket;

import java.net.Socket;

public class TestServer {

public static void main(String[] args) {

try {

System.out.println("启动服务端");

ServerSocket sv = new ServerSocket(2233);

//等待用户链接

Socket socket = sv.accept();

System.out.println("有用户链接！");

while (true) {

//1

InputStream is = socket.getInputStream();

//2

byte[] data = new byte[128];

is.read(data,0,data.length);

//3 按照格式转成字符串输出

String msg = new String(data, "UTF-8");

//收到的内容

System.out.println("收到的内容："+ msg);

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

【客户机端】

import java.io.IOException;

import java.io.OutputStream;

import java.net.Socket;

import java.net.UnknownHostException;

import java.util.Scanner;

public class TestClient {

public static void main(String[] args) {

try {

Socket socket = new Socket("192.169.191.4", 2244);

//Socket socket = new Socket("localhost", 2233);

System.out.println("链接服务器成功！");

while (true) {

System.out.println("请输入内容：");

//1

Scanner input = new Scanner(System.in);

String msg = input.next();

//2

OutputStream os = socket.getOutputStream();

//3

byte[] data = msg.getBytes("UTF-8");

os.write(data);

os.flush();

}

} catch (UnknownHostException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

原文：http://blog.csdn.net/weijj6608/article/details/43409001