Java发送TCP消息

Server端示例代码

这里建立一个端口号为9999的ServerSocket，等待客户端连接，在收到客户端消息时打印出消息：

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class TestTcpServer {
   
	
	public static void main(String[] args) {
   
		ServerSocket serverSocket = null;
		Socket socket = null;
		InputStream is = null;
		ByteArrayOutputStream baos = null;
		try {
   
			//建立服务器socket
			serverSocket = new ServerSocket(9999);		
			//等待客户端连接
			socket = serverSocket.accept();
			//读取客户端消息
			is = socket.getInputStream();
			//管道流
			baos = new ByteArrayOutputStream();
			byte[] buffer = new byte[<