netty: ByteToMessageCodec的用法

一、创建ByteToMessageCodec的子类并重写encode和decode方法

package cn.edu.tju;

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

import java.nio.charset.Charset;
import java.util.List;

public class MyByteToMessageCodec extends ByteToMessageCodec {
    @Override
    protected void encode(ChannelHandlerContext channelHandlerContext, String s, ByteBuf byteBuf) throws Exception {
        System.out.println("encode was called......");
        String finalString = "server response: " + s;
        byteBuf.writeBytes(finalString.getBytes());
    }

    @Override
    protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List