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();
	}

}

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

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

//主类
//Function        : 	EchoServer_demo
public class EchoServer_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
		BufferedReader buf = null;					//声明BufferedReader对象，接受信息
		server = new ServerSocket(8888);	//表示服务器在8888端口上等待客户端的访问
		boolean f = true;
		while(f){
			System.out.println("服务器运行，等待客户端连接：");
			client = server.accept();				//接收客户端连接
			//得到客户端的输入信息
			buf = new BufferedReader(new InputStreamReader(client.getInputStream()));
			//实例化客户端的输出流
			out = new PrintStream(client.getOutputStream());
			boolean flag = true;
			while(flag){
				String str = buf.readLine();				//在此处不断地接收信息
				if(str == null || "".equals(str)){
					flag = false;
				}else{
					if("bye".equals(str)){
						flag = false;
					}else{
						out.print("ECHO"+str);
					}
				}
			}
			out.close();
			client.close();
		}
		server.close();
	}

}

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

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

//主类
//Function        : 	EchoClient_demo
public class EchoClient_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
		PrintStream out = null;							//输出流，向服务器端发送信息
		BufferedReader input = null;				//声明BufferedReader对象
		//从键盘接收数据
		input = new BufferedReader(new InputStreamReader(System.in));
		//向服务器端输出信息
		out = new PrintStream(client.getOutputStream());
		//接收服务器端输入信息
		buf = new BufferedReader(new InputStreamReader(client.getInputStream()));
		boolean flag = true;

		while(flag){
			System.out.print("输入信息：");
			String str = input.readLine();				//从键盘接收数据
			out.println(str);

			if("bye".equals(str)){
				flag = false;
			}else{
				String echo = buf.readLine();
				System.out.println(echo);
			}
		}
		client.close();
		buf.close();
	}

}

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

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

// 类名：ActionHandle
// 属性：
// 方法：
class EchoThreadServer implements Runnable{
	private Socket client = null;

	public EchoThreadServer(Socket client){
		this.client = client;
	}

	@Override
	public void run() {
		// TODO 自动生成的方法存根
		PrintStream out = null;					//声明打印流对象，以向客户端输出
		BufferedReader buf = null;					//声明BufferedReader对象，接受信息

		try{
			//得到客户端的输入信息
			buf = new BufferedReader(new InputStreamReader(client.getInputStream()));
			//实例化客户端的输出流
			out = new PrintStream(client.getOutputStream());
			boolean flag = true;

			while(flag){
				String str = buf.readLine();				//在此处不断地接收信息
				if(str == null || "".equals(str)){
					flag = false;
				}else{
					if("bye".equals(str)){
						flag = false;
					}else{
						out.print("ECHO"+str);
					}
				}

		}
		out.close();
		client.close();
	}catch(Exception e){
		}
	}

}

//主类
//Function        : 	EchoClient_demo
public class EchoThreadServer_demo {

	public static void main(String[] args) throws Exception{
		// TODO 自动生成的方法存根
		ServerSocket server = null;
		Socket client = null;
		server = new ServerSocket(8888);
		boolean f = true;
		while(f){
			System.out.println("服务器运行，等待客户端连接：");
			client = server.accept();
			new Thread(new EchoThreadServer(client)).start();
		}
		server.close();
	}

}