Java Netty解码器-编码器错误

我有以下问题。每次我使用相同的en-and解码器从客户端向服务器发送数据包时，我的服务器控制台中都会出现以下错误：

    io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(72) + length(8) exceeds writerIndex(77): UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeNoCleanerDirectByteBuf(ridx: 72, widx: 77, cap: 1024)
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:461)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:335)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
        at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131)
        at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(72) + length(8) exceeds writerIndex(77): UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeNoCleanerDirectByteBuf(ridx: 72, widx: 77, cap: 1024)
        at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1168)
        at io.netty.buffer.AbstractByteBuf.readLong(AbstractByteBuf.java:651)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:27)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at net.rinet.rnclo.network.encoding.PacketDecoder.decode(PacketDecoder.java:39)
        at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:491)
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:430)
        ... 16 more

我的消息来源如下：

package net.rinet.rnclo.network.encoding;

import net.rinet.rnclo.network.Packet;
import net.rinet.rnclo.network.PacketRegistry;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;

import java.util.List;

/**
 * JavaDoc this file!
 *
 * @author Pascal
 * @version 29.10.2017
 */
@AllArgsConstructor
@NoArgsConstructor
public class PacketDecoder extends ByteToMessageDecoder {
    private PacketRegistry packetRegistry;

    @Override
    public void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> outputList) throws Exception {
        if(byteBuf.isReadable(2)) {
            long id = byteBuf.readLong();

            if(packetRegistry.checkPacketId(id)) {
                Class<? extends Packet> packetClass = packetRegistry.getPacketClassById(id);
                Packet receivedPacket = packetClass.newInstance();
                try {
                    receivedPacket.read(byteBuf);
                } catch (Throwable t) {
                    t.printStackTrace();
                }
                outputList.add(receivedPacket);
            } else {
                decode(channelHandlerContext, byteBuf, outputList);
            }
        }
    }
}

编码器：

import net.rinet.rnclo.network.Packet;
import net.rinet.rnclo.network.PacketRegistry;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;

/**
 * JavaDoc this file!
 *
 * @author Pascal
 * @version 29.10.2017
 */
@AllArgsConstructor
@NoArgsConstructor
public class PacketEncoder extends MessageToByteEncoder<Packet> {
    private PacketRegistry packetRegistry;

    @Override
    protected void encode(ChannelHandlerContext ctx, Packet packet, ByteBuf output) throws Exception {
        long id = this.packetRegistry.getPacketIdByClass(packet.getClass());
        output.writeLong(id);
        packet.write(output);
    }
}

导入net.rinet.rnclo.network.Packet；
导入net.rinet.rnclo.network.PacketRegistry；
导入io.netty.buffer.ByteBuf；
导入io.netty.channel.ChannelHandlerContext；
导入io.netty.handler.codec.MessageToByteEncoder；
导入lombok.allargsconstuctor；
导入lombok.noargsconstuctor；
/**
*JavaDoc这个文件！
*
*@作者帕斯卡
*@version 29.10.2017
*/
@AllArgsConstructor
@诺尔格构装师
公共类PacketEncoder扩展MessageToByteEncoder{
私人包裹登记处包裹登记处；
@凌驾
受保护的无效编码（ChannelHandlerContext ctx、数据包、ByteBuf输出）引发异常{
long id=this.packetRegistry.getPacketIdByClass（packet.getClass（））；
输出写长（id）；
数据包写入（输出）；
}
}

我的解码器是这样的：

package net.rinet.rnclo.network.encoding;

import net.rinet.rnclo.network.Packet;
import net.rinet.rnclo.network.PacketRegistry;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import lombok.AllArgsConstructor;
import lombok.NoArgsConstructor;

import java.util.List;

/**
 * JavaDoc this file!
 *
 * @author Pascal
 * @version 29.10.2017
 */
@AllArgsConstructor
@NoArgsConstructor
public class PacketDecoder extends ByteToMessageDecoder {
    private PacketRegistry packetRegistry;

    @Override
    public void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> outputList) throws Exception {
        if(byteBuf.isReadable(2)) {
            long id = byteBuf.readLong();

            if(packetRegistry.checkPacketId(id)) {
                Class<? extends Packet> packetClass = packetRegistry.getPacketClassById(id);
                Packet receivedPacket = packetClass.newInstance();
                try {
                    receivedPacket.read(byteBuf);
                } catch (Throwable t) {
                    t.printStackTrace();
                }
                outputList.add(receivedPacket);
            } else {
                decode(channelHandlerContext, byteBuf, outputList);
            }
        }
    }
}

package net.rinet.rnclo.network.encoding；
导入net.rinet.rnclo.network.Packet；
导入net.rinet.rnclo.network.PacketRegistry；
导入io.netty.buffer.ByteBuf；
导入io.netty.channel.ChannelHandlerContext；
导入io.netty.handler.codec.ByteToMessageDecoder；
导入lombok.allargsconstuctor；
导入lombok.noargsconstuctor；
导入java.util.List；
/**
*JavaDoc这个文件！
*
*@作者帕斯卡
*@version 29.10.2017
*/
@AllArgsConstructor
@诺尔格构装师
公共类PacketDecoder扩展为tetomessagedecoder{
私人包裹登记处包裹登记处；
@凌驾
公共无效解码（ChannelHandlerContext ChannelHandlerContext、ByteBuf ByteBuf、List outputList）引发异常{
如果（byteBuf.isReadable（2））{
long id=byteBuf.readLong（）；
if（packetRegistry.checkPacketId（id））{
类您正在检查是否可以读取2个字节，然后读取8个字节

改变这个

        if(byteBuf.isReadable(2)) {
            long id = byteBuf.readLong();

到

您正在检查是否可以读取2个字节，然后读取8个字节

改变这个

        if(byteBuf.isReadable(2)) {
            long id = byteBuf.readLong();

到

给我看看你的ByteBuutils代码给我看看你的ByteBuutils代码多么愚蠢的错误…非常感谢你的帮助；）所以如果我取int，我需要将8位替换为4位，对吗？我是说字节sry:d什么愚蠢的错误…非常感谢你的帮助；）所以如果我取int，我需要将8位替换为4位，对吗？我是说bytes sry:d