TCP网络编程

###客户端

import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;

public class Client {
    public static void main(String[] args) throws IOException {
        //1.创建套接字对象
        Socket socket = new Socket("127.0.0.1", 11111);
        //2.获取套接字输出流对象
        OutputStream os = socket.getOutputStream();
        //3.写数据
        os.write("hello ! are you ready?".getBytes());
        //4.释放资源
        socket.close();
    }
}

###服务器端

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) throws IOException {
        //1.创建服务器端套接字对象
        ServerSocket serverSocket = new ServerSocket(11111);
        //2.接受连接获取socket套接字对象  accept侦听到有连接就会创建一个socket对象（可多个）
        Socket socket = serverSocket.accept();
        //3.获取套接字输入流对象
        InputStream is = socket.getInputStream();
        //4.循环读取数据
        int len;
        byte[] bys = new byte[1024];
        while ((len = is.read(bys)) != -1) {
            System.out.println(new String(bys,0,len));
        }
    }
}