我正在尝试从服务器发送和接收消息。服务器已建立在远程环境中。服务器有一些特定的信号代码,例如:这些代码作为字节发送。在这一点上,问题开始了。当客户端与服务器连接时,服务器立即发送 100000050 并在几毫秒后发送 10000051。我应该在收到 10000051 后发送 10000060 但我不知道如何发送。客户端.JAVApublic static void main(String[] args) throws Exception { EventLoopGroup group = new NioEventLoopGroup(); try { Bootstrap clientBootstrap = new Bootstrap(); clientBootstrap.group(group); clientBootstrap.channel(NioSocketChannel.class); clientBootstrap.remoteAddress(new InetSocketAddress("10.80.15.70", 55102)); clientBootstrap.handler(new ChannelInitializer<SocketChannel>() { protected void initChannel(SocketChannel socketChannel) throws Exception { socketChannel.pipeline().addLast(new ClientHandler()); } }); ChannelFuture channelFuture = clientBootstrap.connect().sync(); channelFuture.channel().closeFuture().sync(); } finally { group.shutdownGracefully().sync(); } }客户端处理程序.JAVApublic class ClientHandler extends SimpleChannelInboundHandler<ByteBuf> { private static final Logger LOGGER = Logger.getLogger( ClientHandler.class.getName() ); @Override public void channelActive(ChannelHandlerContext channelHandlerContext){ //System.out.println("\nhelloo"); //channelHandlerContext.writeAndFlush(Unpooled.copiedBuffer("Netty Rocks!", CharsetUtil.UTF_8)); byte [] test = new byte[9]; test[0] = 0; test[1] = 6; test[2] = 0; test[3] = 0; test[4] = 0; test[5] = 0; test[6] = 0; test[7] = 0; test[8] = 1; //byte [] message = "100000060".getBytes(); channelHandlerContext.writeAndFlush(test); } @Override public void channelRead0(ChannelHandlerContext channelHandlerContext, ByteBuf in) { System.out.println("Client received: " + in.toString(CharsetUtil.UTF_8)); }
1 回答
BIG阳
TA贡献1859条经验 获得超6个赞
您可以通过更新您的channelRead0方法来检查收到的消息,然后在收到您正在寻找的消息时回复。
@Override
public void channelRead0(ChannelHandlerContext channelHandlerContext, ByteBuf in) {
String message = in.toString(CharsetUtil.UTF_8);
if (message.equals("10000051")) { //Now do what you were doing in channel active
byte [] test = new byte[9];
test[0] = 0;
test[1] = 6;
test[2] = 0;
test[3] = 0;
test[4] = 0;
test[5] = 0;
test[6] = 0;
test[7] = 0;
test[8] = 1;
//byte [] message = "100000060".getBytes();
channelHandlerContext.writeAndFlush(test);
}
}
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