json格式字符串含有null值，用JSONArray.fromObject转换为json数组时报错

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问题出现

一天突然发现平时正常运行的平台出错了。测试时发现报错

Could not write JSON: null object; nested exception is com.fasterxml.jackson.databind.JsonMappingException: null object (through reference chain: java.util.HashMap["data"]->java.util.HashMap["list"]->net.sf.json.JSONArray[0]->net.sf.json.JSONObject["id"])

问题出在这个第三方api的返回内容

{"page": {"total": 3,"page": 0,"size": 10},"data": [{"id": null,"deviceSerial": "C95252223",...},{"id": null,"deviceSerial": "D43652769",...},...],"code": "200","msg": "操作成功!"
}

多了“id”字段且它的值为null（之前用这个api是没有这个字段的，所以一直没出错）。
解析不了，于是转换过程中就出错了。

 //sr为上面的返回内容JSONObject json = JSONObject.fromObject(sr);if(Integer.parseInt(json.get("code").toString()) == 200 ){responseMap.put("list", JSONArray.fromObject(json.get("data")));//这里出错responseMap.put("page", JSONObject.fromObject(json.get("page")));return ResponseData.success(responseMap);}

问题解决

使用fastjson中的JSON.parseArray()

import com.alibaba.fastjson.JSON;//sr为返回内容
JSONObject json = JSONObject.fromObject(sr);if(Integer.parseInt(json.get("code").toString()) == 200 ){responseMap.put("list", JSON.parseArray(json.get("data").toString()));responseMap.put("page", JSONObject.fromObject(json.get("page")));return ResponseData.success(responseMap);
}

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Unable to evaluate the expression Method threw ‘net.sf.json.JSONException‘ exception.

json格式字符串含有null值，用JSONArray.fromObject转换为json数组时报错

问题出现

问题解决

Unable to evaluate the expression Method threw ‘net.sf.json.JSONException‘ exception.相关推荐

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