1.伺服器端

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

/**
 * 類功能描述：先啟動伺服器端，再啟動客戶端
 *
 * @author：***
 * @createTime：2018/11/5 16:02
 */
public class Server {

    public static void main(String[] args) {
        try {
            //1.建立伺服器socket  指定監聽埠
            ServerSocket serverSocket = new ServerSocket(18080);
            //2.呼叫accept()開始監聽，等待客戶的連線
            System.out.println("---------伺服器即將啟動，等待客戶端連線---------");
            int count = 1;
            //3.迴圈監聽等待客戶端的連線
            while (true) {
                Socket socket = serverSocket.accept();
                ServerThread serverThread = new ServerThread(socket);
                serverThread.start();
                System.out.println("客戶端連線數：" + count++);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
 

2.執行緒類

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

/**
 * 類功能描述：伺服器執行緒處理類
 *
 * @author：***
 * @createTime：2018/11/7 9:15
 */
public class ServerThread extends Thread {
    private Socket socket;


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

    @Override
    public void run() {
        BufferedReader br = null;
        PrintWriter pw = null;
        try {
            //3.讀取客戶端傳送資訊
            br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            System.out.println("接收到客戶端傳送的訊息為：" + br.readLine());
            socket.shutdownInput();
            //4.推送客戶端請求
            pw = new PrintWriter(socket.getOutputStream());
            pw.write("response");
            pw.flush();
            socket.shutdownOutput();
            //5.關閉連線
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (br != null) {
                    br.close();
                }
                if (pw != null) {
                    pw.close();
                }
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }
}
 

3.客戶端類

import java.io.*;
import java.net.Socket;

/**
 * 類功能描述：客戶端，啟動多個客戶端
 *
 * @author：***
 * @createTime：2018/11/5 16:03
 */
public class Client {

    public static void main(String[] args) {
        try {
            //1.建立客戶端socket，指定伺服器地址和埠
            Socket socket = new Socket("127.0.0.1", 18080);
            //2.向伺服器傳送資訊
            PrintWriter pw = new PrintWriter(socket.getOutputStream());
            pw.write("request");
            pw.flush();
            socket.shutdownOutput();
            //3.讀取伺服器推送資訊
            BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            System.out.println("接收到伺服器推送的訊息為：" + br.readLine());
            socket.shutdownInput();
            //4.關閉連線
            br.close();
            pw.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}