java:(二/基于socket的多客户端连接)

其实就是让服务端不断监听客户端连接,一旦有请求则使用多线程单独处理客户端请求,主线程继续监视客户端连接

服务端:

package demo_Socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
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
			ServerSocket serversocket = new ServerSocket(9978);
			// 2,使用accept()方法监听,等待客户端链接
			Socket socket = null;
			long count = 0;
			System.out.println("服务器正在启动,等待客户端连接..");
			while (true) {
				// 用循环不断监听客户端连接
				socket = serversocket.accept();
				// 创建新线程
				ServerThread serverThread = new ServerThread(socket);
				// 启动线程
				serverThread.run();
				count++;
				InetAddress address = socket.getInetAddress();
				System.out.println("该客户端IP地址为:" + address.getHostName());
				System.out.println("客户端连接次数:" + count);

			}

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

服务端的多线程类,用于处理多客户端连接:

package demo_Socket;

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

/*
 * 服务器线程处理类
 */
public class ServerThread extends Thread {
	// 和本线程相关的socket
	Socket socket = null;

	public ServerThread() {

	}

	public ServerThread(Socket socket) {
		this.socket = socket;
	}

	public void run() {
		// 创建输入流,用于接收客户端数据
		InputStream is = null;// 字节输入流
		InputStreamReader isr = null;
		BufferedReader br = null;
		// 创建输出流,用于响应客户端
		OutputStream os = null;
		PrintWriter pw = null;

		try {
			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();
			// 4.获取输出流,响应客户端
			os = socket.getOutputStream();
			pw = new PrintWriter(os);
			pw.write("欢迎使用");
			pw.flush();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {

			// 5,关闭资源
			try {

				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) {
				// TODO: handle exception
			}

		}
	}
}

客户端:

package demo_Socket;

import java.io.BufferedReader;
import java.io.IOException;
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) {
		// 1.创建客户端Socket,指定服务器地址和端口
		try {
			//2.获取输出流,向服务器端发送信息
			
			Socket socket = new Socket("localhost", 9978);
			OutputStream os = socket.getOutputStream();
			PrintWriter pw = new PrintWriter(os);
			pw.write("用户名:tony;密码:789");
			pw.flush();
			socket.shutdownOutput();
			//3.打开输入流,读取服务端的响应信息
			InputStream is=socket.getInputStream();
			//包装成缓冲
			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.关闭各种资源
			br.close();
			is.close();
			pw.close();
			os.close();
			socket.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}