Server：

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
 
public class Server {
 
    /**
     * Socket服務端
     */
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(8888);
            System.out.println(
 
"服務端已啟動，等待客戶端連線..");
 
            while (true) {
                Socket socket = serverSocket.accept();// 偵聽並接受到此套接字的連線,返回一個Socket物件
                SocketThread socketThread = new SocketThread(socket);
                socketThread.start();
            }
            
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
}
 

Client:

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;
import java.net.UnknownHostException;
 
 
public class Client {
 
    /**
     * Socket客戶端
     
 
*/
    public static void main(String[] args) {
        try {
            //建立Socket物件
            Socket socket=new Socket("localhost",8888);
            
            //根據輸入輸出流和服務端連線
            OutputStream outputStream=socket.getOutputStream();//獲取一個輸出流，向服務端傳送資訊
            PrintWriter printWriter=new PrintWriter(outputStream);//將輸出流包裝成列印流
            printWriter.print("服務端你好，我是客戶1");
            printWriter.flush();
            socket.shutdownOutput();//關閉輸出流
            
            InputStream inputStream=socket.getInputStream();//獲取一個輸入流，接收服務端的資訊
            InputStreamReader inputStreamReader=new InputStreamReader(inputStream);//包裝成字元流，提高效率
            BufferedReader bufferedReader=new BufferedReader(inputStreamReader);//緩衝區
            String info="";
            String temp=null;//臨時變數
            while((temp=bufferedReader.readLine())!=null){
                info+=temp;
                System.out.println("客戶端接收服務端傳送資訊："+info);
            }
            
            //關閉相對應的資源
            bufferedReader.close();
            inputStream.close();
            printWriter.close();
            outputStream.close();
            socket.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
 
    }
 
}