03 TCP通信

03 TCP通信

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一、TCP发送数据步骤

1. 创建Socket对象
2. 获取输出流,并写入数据
3. 释放资源

二、TCP接收数据步骤

1. 创建ServerSocket对象
2. 等待客户端连接
3. 获得输入流对象
4. 释放资源

三、TCP的三次握手和四次挥手

四、TCP通信实例

数据发送端：

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

public class ServerDemo {
     
    public static void main(String[] args) throws IOException {
     
        //1.创建Socket对象
        Socket socket = new Socket("127.0.0.1", 10000);
        //2. 获取输出流,并写入数据
        OutputStream out = socket.getOutputStream();
        String str = "hello world !";
        out.write(str.getBytes());
        //3.释放资源
        socket.close();
        out.close();

    }
}

数据接收端：

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

public class ClientDemo {
     
    public static void main(String[] args) throws IOException {
     
        //1. 创建ServerSocket对象
        ServerSocket serverSocket = new ServerSocket(10000);
        //2.等待客户端连接
        Socket accept = serverSocket.accept();
        InputStream inputStream = accept.getInputStream();
        //3.获得输入流对象，并解析数据
        int b=-1;
        while ((b=inputStream.read())!=-1){
     
            System.out.print((char)b);
        }
        //4.释放资源
        inputStream.close();
        accept.close();
        serverSocket.close();


    }
}

      accept.close();
        serverSocket.close();


    }
}