NIO通信example code

    package nio;
    
    import constant.Constant;
    
    import java.io.IOException;
    import java.util.Scanner;
    
    public class NioClient {
    
    private static NioClientHandle nioClientHandle;
    
    public static void start() {
        nioClientHandle = new NioClientHandle(Constant.DEFAULT_SERVER_IP, Constant.DEFAULT_PORT);
        
        new Thread(nioClientHandle, "Client").start();
    }
    
    // 向服务器发送消息
    publi