Java应用与C++服务的通信

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.InetSocketAddress;
    import java.net.Socket;
    
    public class JavaClient {
    
    public static void main(String [] args) throws InterruptedException, IOException
    {
        InetSocketAddress addr = new InetSocketAddress("127.0.0.1", 5678); //创建socket
        Socket sock = new Socket();  
        sock.connect(addr);//连接服务器
    
        BufferedReader is = null;
        PrintWriter os = nul