netty主动发送

// 启动监听和链接
ChannelFuture channelFuture = bootstrap.connect(ip, port).sync();
if (channelFuture.isSuccess()) {
    System.out.println("链接server 成功");
}
channelFuture.channel().closeFuture().sync();

channel.writeAndFlush(request).addListener(new ChannelFutureListener() {
    @Override
    public void operationComplete(ChannelFuture f) throws Exception {
        if (f.isSuccess()) {
            responseFuture.setSendRequestOK(true);
            return;
        } else {
            responseFuture.setSendRequestOK(false);
        }
        responseTable.remove(opaque);
        responseFuture.setCause(f.cause());
        responseFuture.putResponse(null);
        log.warn("send a request command to channel <" + addr + "> failed.");
    }
});

这里是要主动发送对应的数据的