com.alibaba.fastjson.JSONException: default constructor not found. class ……

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com.alibaba.fastjson.JSONException: default constructor not found. class ……

1.json工具类 package com.hyzn.fw.util; import java.util.List; import java.util.Map; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.TypeReference; import com.alibaba.fastjson.serializer.SerializerFeature; /** * @ClassName: JsonUtil * @Desc…

JSON parse error: default constructor not found. class java.time.YearMonth; nested exception is com.alibaba.fastjson.JSONException: default constructor not found. class java.time.YearMonth

java8新出的YearMonth可以方便的用来表示某个月.我的项目中使用springmvc来接收YearMonth类型的数据时发现 x-www-from-urlencoded 格式的数据可以使用"2018-12"的类型接收,但是在post请求中接收application/json的数据时出现以下错误 2020-02-18 11:18:25.284 WARN 16212 --- [nio-8090-exec-2] .w.s.m.s.DefaultHandlerExceptionRes…

redis通过json方案存取对象com.alibaba.fastjson.JSONException: syntax error, expect

问题描述: redis基于json方案存取对象时报错:com.alibaba.fastjson.JSONException: syntax error, expect com.alibaba.fastjson.JSONException: syntax error, expect {, actual [, pos 0 记一次FastJSON和Jackson解析json时遇到的中括号问题突然发现自己取值的时候写法不对: User jsonGetUser = JSON.parseObject(st…

做文件上传下载时报这个错com.alibaba.fastjson.JSONException: illegal identifier : \

::-exec-] DEBUG c.i.e.m.I.insertDataEmebeding - <== Updates: ::-exec-] ERROR c.i.e.c.CaseArchiveController - -----------导出数据失败------------ com.alibaba.fastjson.JSONException: illegal identifier : \ at com.alibaba.fastjson.parser.JSONLexerBase.scanSym…

com.alibaba.fastjson.JSONException: For input string: "8200-12-31"

https://www.cnblogs.com/mengjinluohua/p/5544987.html https://samebug.io/exceptions/458113/com.alibaba.fastjson.JSONException/for-input-string-3000-09-09…

com.alibaba.fastjson.JSONException: exepct '[', but error, pos 1, json : %255B%257B%2522list%2522%253A%255B%257B%2522itemId%2522%253A1369331%252C%2522num%2522%253A2%257D%255D%257D%255

com.alibaba.fastjson.JSONException: exepct '[', but error, pos 1, json : %255B%257B%2522list%2522%253A%255B%257B%2522itemId%2522%253A1369331%252C%2522num%2522%253A2%257D%255D%257D%255D at com.alibaba.fastjson.parser.DefaultJSONParser.parseArray(Defau…