java netty作为tcpServer,delphi TIdTCPClient作为tcpClient

public class NettyServer {
public static void main(String[] args) throws InterruptedException {
    EventLoopGroup bossGroup = new NioEventLoopGroup();
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    public void initChannel(SocketChannel ch)
                            throws Exception {
                        ch.pipeline().addLast(new TcpServerHandler());
                    }
                });
        ChannelFuture f = b.bind(8080).sync();
        f.channel().closeFuture().sync();
    } finally {
        workerGroup.shutdownGracefully();
        bossGroup.shutdownGracefully();
    }
}


public class TcpServerHandler extends ChannelInboundHandlerAdapter {
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws UnsupportedEncodingException {
    try {
        ByteBuf in = (ByteBuf) msg;
        System.out.println("channelRead:" + in.toString(CharsetUtil.UTF_8));
        byte[] responseByteArray = "hello".getBytes("UTF-8");
        ByteBuf out = ctx.alloc().buffer(responseByteArray.length);
        out.writeBytes(responseByteArray);
        ctx.writeAndFlush(out);
        //ctx.write("hello");
    } finally {
        ReferenceCountUtil.release(msg);
    }
}

@Override
public void channelActive(ChannelHandlerContext ctx) throws  UnsupportedEncodingException{
    System.out.println("channelActive:" + ctx.channel().remoteAddress());
    ChannelGroups.add(ctx.channel());

}

@Override
public void channelInactive(ChannelHandlerContext ctx) {
    System.out.println("channelInactive:" + ctx.channel().remoteAddress());
    ChannelGroups.discard(ctx.channel());
}

@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
    cause.printStackTrace();
    ctx.close();
}

}

  AStream := TStringStream.Create;
  IdTCPClient.IOHandler.ReadStream(AStream);

我还使用

IdTCPClient.IOHandler.ReadLn()

并且仍然无法获取返回数据。