为什么用java netty client 发送byte数组 到 golang tcp server 接收不到呢？

**我的java netty client写法如下** <code> ``` NioEventLoopGroup worker = new NioEventLoopGroup(); bootstrap.group(worker); bootstrap.channel(NioSocketChannel.class); bootstrap.handler(new ChannelInitializer<Channel>() { @Override protected void initChannel(Channel channel) throws Exception { //大端发送顺序 channel.pipeline().addLast(new LengthFieldBasedFrameDecoder(ByteOrder.BIG_ENDIAN,1024*1024,2,2,-4,0,true)); channel.pipeline().addLast(new ClientHandler()); } }); ChannelFuture f = bootstrap.connect("127.0.0.1", 30000); //发送消息 byte[] msg = "I am java netty client msg".getBytes(); //如果msg为单纯的字符串，go可以接受到，如果改成byte数组，go就一阻塞到 conn.Read(buffer) f.channel().writeAndFlush(msg) ``` </code> **我的golang tcp server 写法如下** <code> ``` func main() { listen, err := net.Listen("tcp", "127.0.0.1:30000") if err != nil { fmt.Println("listen failed, err:", err) return } defer listen.Close() for { conn, err := listen.Accept() if err != nil { fmt.Println("accept failed, err:", err) continue } go func() { defer conn.Close() var num int32 buffer := make([]byte, 6) _, err := conn.Read(buffer) //如果java netty 发的byte[] 字节数组的话，则一直阻塞在这一行 if err != nil { return } buf := bytes.NewReader(buffer) err = binary.Read(buf, binary.BigEndian, &num) fmt.Println(buf) }() } } ``` </code> 如果java netty 发的byte[] 字节数组的话 ，就一直阻塞 _, err := conn.Read(buffer) **请问是怎么回事，大小端问题？**