FastJson解析处理内部类问题

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1.com.alibaba.fastjson.JSONException: create instance error

2.报错default constructor not found. class.............

一开始是这样定义的

class TempData {@JsonProperty("Count")private String Count;@JsonProperty("Time")private String Time;public TempData() {}public String getCount() {return Count;}public void setCount(String count) {Count = count;}public String getTime() {return Time;}public void setTime(String time) {Time = time;}}

但是在转换的时候抛出异常信息

com.fasterxml.jackson.databind.JsonMappingException: No suitable constructor found for type [simple type, class com.yolipai.wifi.server.statisticsV2.impl.PassengerFlowServiceImpl$TempData]: can not instantiate from JSON object (need to add/enable type information?) at [Source: java.io.StringReader@66689699; line: 1, column: 3]at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:164)at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1078)at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:268)at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:124)at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:227)at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:204)at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:23)at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2986)at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2105)at com.yolipai.wifi.utils.JsonUtil.jsonToObject(JsonUtil.java:94)

解决方案：1.给内部类创建一个空的构造函数。如：

publicTempData(){}

2.在class 前加上static，把它变为静态内部类即可解决问题

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