这个channel可以直接绑定多个handler，不用写服务端代码和客户端代码。便于用于测试。

package com.xkj.bound;import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.channel.embedded.EmbeddedChannel;
import lombok.extern.slf4j.Slf4j;@Slf4j
public class TestEmbeddedChannel {public static void main(String[] args) {ChannelInboundHandlerAdapter h1 = new ChannelInboundHandlerAdapter(){@Overridepublic void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {log.debug("1");super.channelRead(ctx, msg);}};ChannelInboundHandlerAdapter h2 = new ChannelInboundHandlerAdapter(){@Overridepublic void channelRead(ChannelHa