Java 内蒂：发送消息有问题

所以我最近和netty（5.0.0.Alpha2）合作了一点，我非常喜欢它！但不幸的是，我无法让发送/接收消息工作。奇怪的是，连接和断开就像一种魅力。服务器接收客户机已连接/断开连接且通道已添加/删除的消息。只是消息不能正常工作

我确实尝试过很多其他的方法（例如没有编码器），但它从来都不起作用。。也许这里有人知道？我真的很感激

提前谢谢！您可以在下面找到所有使用的源代码：

CoreClient.java

package me.creepsterlgc.coreclient;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.Delimiters;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class CoreClient extends Thread {

    private String host;
    private int port;

    private Channel channel;

    public CoreClient(String host, int port) {
        this.host = host;
        this.port = port;
    }

    public void run() {
        EventLoopGroup group = new NioEventLoopGroup();

        try {
            Bootstrap bootstrap = new Bootstrap()
            .group(group)
            .channel(NioSocketChannel.class)
            .handler(new ChannelInitializer<SocketChannel>() {

                    @Override
                    protected void initChannel(SocketChannel channel) throws Exception {

                        ChannelPipeline pipeline = channel.pipeline();
                        pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
                        pipeline.addLast("encoder", new StringEncoder());
                        pipeline.addLast("decoder", new StringDecoder());
                        pipeline.addLast("handler", new CoreClientHandler());

                    }

            });

            ChannelFuture f = bootstrap.connect(host, port);
            channel = f.sync().channel();
            ChannelFuture cf = null;
            try {
                cf = channel.writeAndFlush("Testing..").sync();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            if (!cf.isSuccess()) {
                System.out.println("Send failed: " + cf.cause());
            }

        }
        catch (InterruptedException e) {
            e.printStackTrace();    
        }
        finally {

        }

    }

    public void send(String message) {
        ChannelFuture cf = null;
        try {
            cf = channel.writeAndFlush(message).sync();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        channel.flush();
        if (!cf.isSuccess()) {
            System.out.println("Send failed: " + cf.cause());
        }
    }

    public void shutdown() {

    }

}

CoreServer.java

package me.creepsterlgc.coreserver;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.Delimiters;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class CoreServer extends Thread {

    private int port;

    public CoreServer(int port) {
        this.port = port;
    }

    public void run() {

        EventLoopGroup boss = new NioEventLoopGroup();
        EventLoopGroup worker = new NioEventLoopGroup();

        try {
            ServerBootstrap bootstrap = new ServerBootstrap()
            .group(boss, worker)
            .channel(NioServerSocketChannel.class)
            .childHandler(new ChannelInitializer<SocketChannel>() {

                    @Override
                    protected void initChannel(SocketChannel channel) throws Exception {

                        ChannelPipeline pipeline = channel.pipeline();
                        pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
                        pipeline.addLast("encoder", new StringEncoder());
                        pipeline.addLast("decoder", new StringDecoder());
                        pipeline.addLast("handler", new CoreServerHandler());

                    }

            });

            ChannelFuture f = bootstrap.bind(port).sync();
            f.channel().closeFuture().sync();

        }
        catch (InterruptedException e) {
            e.printStackTrace();
        }
        finally {
            boss.shutdownGracefully();
            worker.shutdownGracefully();
        }

    }

}

你应该替换

 try {
    cf = channel.write("Testing..").sync();
 } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
 }
 channel.flush();

与：

你应该替换

 try {
    cf = channel.write("Testing..").sync();
 } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
 }
 channel.flush();

与：

---

你正在使用的netty版本是什么？嗨，Sudheera，我正在使用以下版本：5.0.0。Alpha2你正在使用的netty版本是什么？嗨，Sudheera，我正在使用以下版本：5.0.0。Alpha2Hi Norman，谢谢你的回复！我替换了channel.flush（）；使用直接的.writeAndFlush（）；但似乎仍然没有消息发送。在两次访问客户后，我收到以下日志：嗨，诺曼，谢谢你的回复！我替换了channel.flush（）；使用直接的.writeAndFlush（）；但似乎仍然没有消息发送。在对客户端执行两次扫描后，我收到以下日志：

 try {
    cf = channel.write("Testing..").sync();
 } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
 }
 channel.flush();

 try {
    cf = channel.writeAndFlush("Testing..").sync();
 } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
 }