Question

假设我有此数据示例：-

{
"store": {
    "book": [
        {
            "category": "reference",
            "author": "Nigel Rees",
            "title": "Sayings of the Century",
            "price": 8.95
        },
        {
            "category": "fiction",
            "author": "Evelyn Waugh",
            "color": "red", 
            "title": "Sword of Honour",
            "price": 12.99
        },
        {
            "category": "fiction",
            "author": "Herman Melville",
            "color": "blue", 
            "title": "Moby Dick",
            "isbn": "0-553-21311-3",
            "price": 8.99
        },
        {
            "category": "fiction",
            "author": "J. R. R. Tolkien",
            "title": "The Lord of the Rings",
            "isbn": "0-395-19395-8",
            "price": 22.99
        }
    ],
    "bicycle": {
        "color": "red",
        "price": 19.95
    }
},
"expensive": 10

}

如果我查找JsonPath $ .store..isbn 我回来了：-

[
  "0-553-21311-3",
  "0-395-19395-8"
]

我想要的是：-

[
  null,
  null,
  "0-553-21311-3",
  "0-395-19395-8"
]

有人可以说出在JsonPath中是否可行吗？如果没有，还有其他选择吗？

Answer 1

您可以尝试比较结果长度和数据长度，然后将所需的null量压入数组的开头。

Answer 2

使用Configuration即可实现。

需要在配置中设置Files: export选项，如果节点不在其中，它将返回null

完整示例为：

Protect File

输出：

Option.DEFAULT_PATH_LEAF_TO_NULL

希望打印“ null”

2 个答案: