一、socket

　　服務端

public class A01server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8888);
        Socket socket = serverSocket.accept();

        InputStream inputStream = socket.getInputStream();
        byte[] bytes = new byte
 
[1024];
        int len = inputStream.read(bytes);
        System.out.println(new String(bytes, 0, len));


        OutputStream outputStream = socket.getOutputStream();
        outputStream.write("收到謝謝".getBytes());

        socket.close();
        serverSocket.close();
    }
}

　　客戶端

public class A01client {
    
 
public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 8888);

        OutputStream outputStream = socket.getOutputStream();
        outputStream.write("你好伺服器".getBytes());

        InputStream inputStream = socket.getInputStream();
        byte[] bytes = new
 
 byte[1024];
        int len = inputStream.read(bytes);
        System.out.println(new String(bytes, 0, len));

        socket.close();
    }
}