Java网络编程

package com.fgy.demo;

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

/**
 * 服务器端
 */
public class TCPServer {
    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(8888);
        Socket socket = server.accept();

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

        OutputStream os = socket.getOutputStream();
        os.write("收到，谢谢！".getBytes());

        socket.close();
        server.close();
    }
}

package com.fgy.demo;

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

/**
 * 客户端
 */
public class TCPClient {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 8888);
        OutputStream os = socket.getOutputStream();
        os.write("你好，服务器！".getBytes());

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

        socket.close();
    }
}