Java——TCP

import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

//=================================================
// File Name       :	HelloServer_demo
//------------------------------------------------------------------------------
// Author          :	Common



//主类
//Function        : 	HelloServer_demo
public class HelloServer_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		ServerSocket server = null; 			//声明ServerSocket对象
		Socket client = null;							//一个Socket对象表示一个客户端
		PrintStream out = null;					//声明打印流对象，以向客户端输出
		server = new ServerSocket(8888);	//表示服务器在8888端口上等待客户端的访问
		System.out.println("服务器运行，等待客户端连接");
		client = server.accept();					//程序阻塞，等待客户端连接
		String str = "HelloWord";					//要向客户端输出信息
		out = new PrintStream(client.getOutputStream());	//实例化打印流对象，输出信息
		out.println(str);
		out.close();
		client.close();
		server.close();
	}

}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Socket;

//=================================================
// File Name       :	HelloClient_demo
//------------------------------------------------------------------------------
// Author          :	Common



//主类
//Function        : 	HelloClient_demo
public class HelloClient_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		Socket client = null;									//声明Socket对象
		client = new Socket("localhost",8888);	//指定连接的主机和端口
		BufferedReader buf = null;					//声明BufferedReader对象，接受信息
		//指定客户端的输入流
		buf = new BufferedReader(new InputStreamReader(client.getInputStream()));
		String str = buf.readLine();
		System.out.println("服务器输出的内容是"+str);
		client.close();
		buf.close();
	}

}