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

本文转载自  查看原文  2019-03-14 11:52  3545 

记一次踩坑经历：
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类Image中有一个属性类型刚开始设置成int类型，生成getter/setter方法后，又将其改成了Integer类型，结果就出现了上述情况


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猜您在找 SpringMVC分页查询无法直接将对象转换成json的解决办法（报org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type:错） org.springframework.http.converter.json.MappingJacksonHttpMessageConverter 报错：org.springframework.http.converter.json.MappingJacksonHttpMessageConverter org.springframework.http.converter.HttpMessageConversionException: T 异常：org.springframework.http.converter.HttpMessageNotReadableException Springmvc 中org.springframework.http.converter.json.MappingJackson2HttpMessageConverter依赖jackson包 Failed to read HTTP message: org.springframework.http.converter.HttpMessageN org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing 请求返回 org.springframework.http.converter.HttpMessageNotReadableException Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public xxxxxxxx.
 
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