解决方法: 1.没有绝对的方法,只能不断的测试和排查. 2.检查一下JSON数据和实体的字段结构是不是不一致导致的.比如JSON数据是数组,而实体字段为非数组. 参考: https://stackoverflow.com/questions/21178215/can-not-deserialize-instance-of-task-out-of-start-array-token https://stackoverflow.com/questions/19333106/jsonmappingex…

Json 反序列化异常 Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of com.consumer.pojo.Message out of START_ARRAY token at [Source: java.io.PushbackInput…

代码程序: @PostMapping("selectById") @ResponseBody public Result selectById(@RequestBody int id) { Result result =new Result(); List<User> list = userService.selectById(id); if(list.size()==1){ result.setCode("000"); result.setMsg(&q…

之前使用springmvc搭建了restful风格的接口服务,在使用mockmvc进行集成测试的时候出现了异常:Can not deserialize instance of int out of START_OBJECT token.为什么会出现这个问题?怎么解决这个问题呢?接下来本文详细分析讲解这个问题. 一.问题展现 接口代码 @ResponseBody @RequestMapping(value = "/m1", method = RequestMethod.POST) @Ap…

org.springframework.http.converter.HttpMessageNotReadableException: Could not read JSON: Can not deserialize instance of java.lang.String out of START_OBJECT token at [Source: org.apache.http.conn.EofSensorInputStream@42b0f150; line: 1, column: 112]…

异常信息如下: JSON parse error: Can not deserialize instance of java.lang.String out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token…

报错栈: -- ::, ERROR [http-bio--exec-] cube.CubeManager: : Error during load cube instance, skipping : /cube/energon_dm_admission_record_fact_01.json java.lang.IllegalStateException: Failed to init CubeDescManager from kylin_metadata@hbase at org.apache…

线上问题: { "timestamp": "1544510665", "status": 400, "error": "Bad Request", "exception": "org.springframework.http.converter.HttpMessageNotReadableException", "message": "C…

Jackson对于date的反序列化只支持几种,如果不符合默认格式则会报一下错误 org.codehaus.jackson.map.JsonMappingException: Can not construct instance of java.util.Date from String value '2012-12-12 12:01:01': not a valid representation (error: Can not parse date "2012-12-12 12:01:01&q…

错误场景 用Spring boot写了一个简单的RESTful API,在测试POST请求的时候,request body是一个符合对应实体类要求的json串,post的时候报错. 先贴一段error log: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `com.yucfeng.Entity.EData` (no Creators, like defaul…