服务端:package cn.tedu.nio.channel;import java.net.InetSocketAddress;import java.nio.ByteBuffer;import java.nio.channels.ServerSocketChannel;import java.nio.channels.SocketChannel;public class ServerSocketChannelDemo01 {    public static void main(String[] args) throws Exception {        //1.创建ServerSockentChannel对象        ServerSocketChannel ssc = ServerSocketChannel.open();        //2.绑定指定端口        ssc.bind(new InetSocketAddress(44444));        //3.设置非阻塞模式        ssc.configureBlocking(false);        //4.接收客户端连接        SocketChannel sc = null;        while(sc == null){            sc = ssc.accept();        }        sc.configureBlocking(false);        //5.读取数据        ByteBuffer buf = ByteBuffer.allocate(5);        while(buf.hasRemaining()){            sc.read(buf);        }        //6.获取数据打印        byte[] arr = buf.array();        String str = new String(arr);        System.out.println(str);                //5.关闭通道        sc.close();        ssc.close();    }}客户端:    package cn.tedu.nio.channel;        import java.net.InetSocketAddress;    import java.nio.ByteBuffer;    import java.nio.channels.SocketChannel;        public class SocketChannelDemo01 {        public static void main(String[] args) throws Exception {            //1.创建客户端SocketChannel            SocketChannel sc = SocketChannel.open();            //2.配置启用非阻塞模式            sc.configureBlocking(false);            //3.连接服务器            boolean isConn = sc.connect(new InetSocketAddress("127.0.0.1", 44444));            if(!isConn){                while(!sc.finishConnect()){                }            }                        //4.发送数据到服务器            ByteBuffer buf = ByteBuffer.wrap("abcde".getBytes());            while(buf.hasRemaining()){                sc.write(buf);            }                        //5.关闭通道            sc.close();        }    }