import org.jboss.netty.handler.codec.replay.VoidEnum; //导入依赖的package包/类
@Override
protected Object decode(ChannelHandlerContext ctx, Channel chan,
                        ChannelBuffer buffer, VoidEnum state) throws Exception {
    Message message = serializer.deserialize(new ChannelBufferInputStream(buffer));
    if (message instanceof VersionMessage)
        onVersionMessage(message);
    return message;
}
 

import org.jboss.netty.handler.codec.replay.VoidEnum; //导入依赖的package包/类
protected Object decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer, VoidEnum state)
                                                                                                         throws Exception {
    return buffer.readBytes(buffer.readInt());
}