Java的Socket通信----通过 Socket 实现 TCP 编程之多线程demo(2)

JAVA Socket简介

所谓socket 通常也称作”套接字“，用于描述IP地址和端口，是一个通信链的句柄。应用程序通常通过”套接字”向网络发出请求或者应答网络请求。

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;

public class Client {
public static void main(String[] args) {
	try {
		Socket socket = new Socket("localhost", 8080);//1.创建客户端Socket，指定服务器地址和端口
		//2.获取输出流，向服务器端发送信息
		OutputStream os = socket.getOutputStream();//字节输出流
		PrintWriter pw = new PrintWriter(os);//将输出流包装为打印流
		pw.write("用户名：whf;密码：789");
		pw.flush();
		socket.shutdownOutput();//关闭输出流
		//3.获取输入流，并读取服务器端的响应信息
		InputStream is = socket.getInputStream();
		BufferedReader br = new BufferedReader(new InputStreamReader(is));
		String info = null;
		while ((info = br.readLine()) != null) {
			System.out.println("我是客户端，服务器说：" + info);
		}
		//4.关闭资源
		br.close();
		is.close();
		pw.close();
		os.close();
		socket.close();
	} catch (Exception e) {
		// TODO: handle exception
	}
}
}

　　

import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
public static void main(String[] args) {
	try {
		//1.创建一个服务器端Socket，即ServerSocket，指定绑定的端口，并监听此端口
		ServerSocket serverSocket = new ServerSocket(8080);
		Socket socket = null;
		int count = 0;//记录客户端的数量
		System.out.println("***服务器即将启动，等待客户端的连接***");
		while (true) {
			socket = serverSocket.accept();//调用accept()方法开始监听，等待客户端的连接
			//创建一个新的线程
			ServerThread serverThread = new ServerThread(socket);
			serverThread.start();//启动线程
			count++;
			System.out.println("客户端的数量：" + count);
			InetAddress address = socket.getInetAddress();
			System.out.println("当前客户端的IP：" + address.getHostAddress());
		}
	} catch (Exception e) {
		e.printStackTrace();
	}
}
}

　　

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;

/**
 *
 * @ClassName: ServerThread
 * @Description:  服务器线程处理类
 * @author: xfzhong
 * @date:
 */
public class ServerThread extends Thread{
	Socket socket=null;// 和本线程相关的Socket
	public ServerThread(Socket socket) {
		this.socket=socket;
	}
	//线程执行的操作，响应客户端的请求
public void run() {
	InputStream is=null;
	InputStreamReader isr=null;
	BufferedReader br=null;
	OutputStream os=null;
	PrintWriter pw=null;
	try {
		//获取输入流，并读取客户端信息
		is = socket.getInputStream();
		isr = new InputStreamReader(is);
		br = new BufferedReader(isr);
		String info = null;
		while ((info = br.readLine()) != null) {
			System.out.println("我是服务器，客户端说：" + info);
		}
		socket.shutdownInput();//关闭输入流
		//获取输出流，响应客户端的请求
		os = socket.getOutputStream();
		pw = new PrintWriter(os);
		pw.write("欢迎您！");
		pw.flush();//调用flush()方法将缓冲输出
	} catch (Exception e) {
		e.printStackTrace();
	}finally{
		try {
			//关闭资源
			if (pw != null)
				pw.close();
			if (os != null)
				os.close();
			if (br != null)
				br.close();
			if (isr != null)
				isr.close();
			if (is != null)
				is.close();
			if (socket != null)
				socket.close();
		} catch (Exception e2) {
			e2.printStackTrace();
		}
	}

}
}