补充netty权威指南学习自定义协议实现，与springboot集成

鉴于netty权威指南上面的自定义协议实现部分不完整，为此本博主，将自定义协议这块补充了以下，以供大家参考，自定义协议主要采用长度进行粘包处理，编解码自定义实现，具体如下

工程分三个部分

1、common  主要包含实体，枚举，一些公用的编解码常量等

2、service 服务端

3、client   客户端

下面上代码

pom主要添加上相应依赖，这里主要粘贴部分主要依赖

 
            io.netty
            netty-all
            4.1.50.Final
        
        
            org.projectlombok
            lombok
            true
        
        
            cn.hutool
            hutool-all
            5.0.5
        

common

entity

package com.drawnblue.nettycommon.entity;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
import java.util.Map;
@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class Head implements Serializable {
    private Integer crcCode;
    private Integer length;
    private Long sessionId;
    private Byte type;
    private Byte priority;
    private Map attachment;

}


package com.drawnblue.nettycommon.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Body implements Serializable {
    private Object payload;
}


package com.drawnblue.nettycommon.entity;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class Message implements Serializable {

    private Head head;
    private Body body;

}

编解码

package com.drawnblue.nettycommon.codec;

import com.drawnblue.nettycommon.constant.NettyConstant;
import com.drawnblue.nettycommon.entity.Body;
import com.drawnblue.nettycommon.entity.Head;
import com.drawnblue.nettycommon.entity.Message;
import com.drawnblue.nettycommon.util.ByteUtil;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.util.CharsetUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service(value = "decode")
public class MsgDecode extends ByteToMessageDecoder {
    @Override
    protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List