JSONPath对于list的处理，当取值为null的时候，是否可以增加一个选项设置把null value设置到list里面，而不是直接忽略

[liverliu]

对如下数据使用：JSONPath.eval(json, "$.data.dataRows[*].dataFields[*].value")，返回了6个元素的list，是否可以增加一种配置可以返回7个元素的list，其中首元素是null；当前默认的忽略处理，业务代码里面无法正确的映射元素的顺序，导致错误。

也就是希望有种方式，能让我取出的list是下面这种形式：
[null,"C3736",1621126800000,"**","29***6",1605456000000,"240397"]

而不是现在这样：
["C3736",1621126800000,"**","29***6",1605456000000,"240397"]

jayway的jsonpath是有这种能力的
Configuration conf = Configuration.defaultConfiguration().addOptions(Option.DEFAULT_PATH_LEAF_TO_NULL);
return JsonPath.using(conf).parse(json).read(path);

{
"data": {
"dataRows": [
{
"dataFields": [
{
"id": 1332,
"name": "gmtRegular",
"status": "success",
"valueType": "DATE"
},
{
"id": 302,
"name": "deptNo",
"status": "success",
"value": "C3736",
"valueType": "STRING"
},
{
"id": 143,
"name": "gmtOrigRegular",
"status": "success",
"value": 1621126800000,
"valueType": "DATE"
},
{
"id": 135,
"name": "name",
"status": "success",
"value": "",
"valueType": "STRING"
},
{
"id": 133,
"name": "workNo",
"status": "success",
"value": "29*6",
"valueType": "STRING"
},
{
"id": 140,
"name": "gmtEntry",
"status": "success",
"value": 1605456000000,
"valueType": "DATE"
},
{
"id": 199,
"name": "superWorkNo",
"status": "success",
"value": "240397",
"valueType": "STRING"
}
]
}
]
},
"status": "success",
"success": true
}

[github-ganyu]

I think this is a good proposal and I try to submit a PR.

[github-ganyu]

我写了一个重载方法，第二个参数传false代表不忽略空值：
JSONPath.eval(json, "$.data.dataRows[].dataFields[].value", false);
15ac107