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org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON

本文轉載自   查看原文   2019-03-14 11:52   3545 

記一次踩坑經歷：
Resolved [org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: (was java.lang.NullPointerException); nested exception is com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: com.renqijie.pojo.vo.IndexBean["images"]->java.util.ArrayList[0]->com.renqijie.pojo.Image["id"])]

原因：
JavaBean類Image中有一個屬性類型剛開始設置成int類型，生成getter/setter方法后，又將其改成了Integer類型，結果就出現了上述情況


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猜您在找 【spring boot】接口響應報錯無法轉化為JSON返回 org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type SpringMVC分頁查詢無法直接將對象轉換成json的解決辦法（報org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type:錯） org.springframework.http.converter.json.MappingJacksonHttpMessageConverter HttpMessageNotWritableException: Could not write JSON: No serializer found for class **** 報錯：org.springframework.http.converter.json.MappingJacksonHttpMessageConverter nested exception is java.lang.NoClassDefFoundError: Could not initialize class org.springframework.http.converter.json.MappingJackson2HttpMessageConverter org.springframework.http.converter.HttpMessageConversionException: T 異常：org.springframework.http.converter.HttpMessageNotReadableException org.springframework.http.converter.HttpMessageNotReadableException Springmvc 中org.springframework.http.converter.json.MappingJackson2HttpMessageConverter依賴jackson包
 
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