ChatServer/src/main/java/cn/com/zyjblogs/chat/netty/MyMessageDecoder.java

package cn.com.zyjblogs.chat.netty;


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

import java.util.List;

public class MyMessageDecoder extends ReplayingDecoder<MessageProtocol> {


    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        System.out.println("\nMyMessageDecoder方法被调用 解码");
        //需要将得到的二进制字节码 转成 MessageProtocol
        int length = in.readInt();
        byte[] content = new byte[length];
        in.readBytes(content);
        //封装成MessageProtocol对象，放入out中,传给下一个handler
        MessageProtocol messageProtocol = new MessageProtocol();
        messageProtocol.setLen(length);
        messageProtocol.setContent(content);
        out.add(messageProtocol);
    }
}