Netty(十) Netty5.x 自定义编码解码器

Netty(十) Netty5.x 自定义编码解码器

netty学习目录
一、Netty(一) NIO例子
二、Netty(二) netty服务端
三、Netty(三) Netty客户端+服务端
四、Netty(四) 简化版Netty源码
五、Netty(五)Netty5.x服务端
六、Netty(六) Netty Http 服务器例子
七、Netty(七) Netty服务端+客户端代码
八、Netty(八) Netty多客户端连接例子
九、Netty(九) Netty会话清除
十、Netty(十) Netty自定义编码器解码器
十一、Netty(十一) Netty对象传输

基于Netty5.x自定义编解码器

自定义消息实体

package com.zqw.netty5x.customproto;

import java.io.Serializable;

public class Header implements Serializable {
    private int tag;
    private int commandCode;
    private int version;
    private int length;

    public int getTag() {
        return tag;
    }

    public void setTag(int tag) {
        this.tag = tag;
    }

    public int getCommandCode() {
        return commandCode;
    }

    public void setCommandCode(int commandCode) {
        this.commandCode = commandCode;
    }

    public int getVersion() {
        return version;
    }

    public void setVersion(int version) {
        this.version = version;
    }

    public int getLength() {
        return length;
    }

    public void setLength(int length) {
        this.length = length;
    }

    @Override
    public String toString() {
        return "Header{" +
                "tag=" + tag +
                ", commandCode=" + commandCode +
                ", version=" + version +
                ", length=" + length +
                '}';
    }
}

package com.zqw.netty5x.customproto;

import java.io.Serializable;

public class Message implements Serializable {
    private Header header;
    private Object data;

    public Header getHeader() {
        return header;
    }

    public void setHeader(Header header) {
        this.header = header;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    @Override
    public String toString() {
        return "Message{" +
                "header=" + header +
                ", data=" + data +
                '}';
    }
}

解码器

package com.zqw.netty5x.customproto;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

public class MyDecoder extends ByteToMessageDecoder {
    private int MIN_LENGTH = 4 + 4 + 4 + 4;
    private int TAG = 1;
    private int MAX = 2048;
    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List