Netty接收信息出错：An exceptionCaught() event was fired, and it reached at the tail of the pipeline.

Netty接收信息出错：io.netty.channel.DefaultChannelPipeline : An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
com.alibaba.fastjson.JSONException: syntax error, pos 2, line 1, column 3[object Object]

一般是处理信息出错，特别是序列化问题。
前端传值的时候应该使用：