TCP网络编程 双向单次通讯

客户机端

package tcp;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class TcpClient {

    public static void main(String[] args) throws UnknownHostException, IOException {
        //建立TCP服务
        Socket s = new Socket(InetAddress.getLocalHost(), 9000);
        //获取Socket的输出流
        OutputStream outputStream = s.getOutputStream();
        //利用输出流对象把数据写出
        outputStream.write("服务器，你好".getBytes());
        //获取到输入流对象，读取服务器回送的数据
        InputStream inputStream = s.getInputStream();
        byte buf [] = new byte[1024];
        int length = inputStream.read(buf);
        System.out.println(new String(buf, 0, length));
        s.close();
        
    }

}

服务器端

package tcp;

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

/**
 * 
 * @author xiaotao
 *客户端发送一个字符串，并接受服务器端回传的消息
 */
public class TcpServer {

    public static void main(String[] args) throws IOException {
        //建立TCP服务器，并监听一个端口
        ServerSocket serverSocket = new ServerSocket(9000);
        //接受客户端的连接
        Socket socket = serverSocket.accept();
        //获取输入流对象，读取客户端发送的内容
        InputStream inputStream = socket.getInputStream();
        byte buf [] = new byte[1024];
        int length = 0;
        length = inputStream.read(buf);
        System.out.println(new String(buf, 0, length));
        //获取socket输出流对象，向客户端发送数据
        OutputStream outputStream = socket.getOutputStream();
        outputStream.write("收到你发的消息，客户端你好".getBytes());
        serverSocket.close();
        
    }

}