jsonpath

https://jsonpath.com/

功能	JSONPath符号	XPath符号	描述
根节点	`$`	`/`	访问JSON或XML的根节点
子节点	`.`	`/`	访问当前节点的子节点
所有子节点	`*`	`*`	访问当前节点的所有子节点
数组索引	`[n]`	`[n]`	访问数组的第n个元素
所有数组元素	`[*]`	`*`	访问数组中的所有元素
合并操作符	`[,]`		访问若干个元素
切片运算符	`[:]`		访问若干个元素，左闭右开
递归下级	`..`	`//`	访问当前节点及其所有子孙节点
过滤条件	`[?()]`	`[condition]`	根据条件筛选节点

返回的结果均为数组

示例

json
{
  "store": {
    "book": [
      {
        "category": "reference",
        "price": 8.95
      },
      {
        "category": "fiction",
        "price": 18.95
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 9.95
    },
    "candy": [
      2, 10, 7, 9, 8, 5, -1
    ]
  }
}

json
[
  {
    "store": {
      "book": [
        {
          "category": "reference",
          "price": 8.95
        },
        {
          "category": "fiction",
          "price": 18.95
        }
      ],
      "bicycle": {
        "color": "red",
        "price": 9.95
      },
      "candy": [
        2, 10, 7, 9, 8, 5, -1
      ]
    }
  }
]

$.store

json
[
  {
    "book": [
      {
        "category": "reference",
        "price": 8.95
      },
      {
        "category": "fiction",
        "price": 18.95
      }
    ],
    "bicycle": {
      "color": "red",
      "price": 9.95
    },
    "candy": [
      2, 10, 7, 9, 8, 5, -1
    ]
  }
]

$.store.* | $.store[*]

json
[
  [
    {
      "category": "reference",
      "price": 8.95
    },
    {
      "category": "fiction",
      "price": 18.95
    }
  ],
  {
    "color": "red",
    "price": 9.95
  },
  [
    2, 10, 7, 9, 8, 5, -1
  ]
]

$.store.book[1]

json
[
  {
    "category": "fiction",
    "price": 18.95
  }
]

$.store.book[*]

json
[
  {
    "category": "reference",
    "price": 8.95
  },
  {
    "category": "fiction",
    "price": 18.95
  }
]

$.store..category

json
[
  "reference",
  "fiction"
]

$.store[?(@.price < 10)]

json
[
  {
    "color": "red",
    "price": 9.95
  }
]

$.store.[?(@.price < 10)]

json
[
  {
    "color": "red",
    "price": 9.95
  },
  {
    "category": "reference",
    "price": 8.95
  }
]

$..candy.[1,3,2] | $..candy[1,3,2]

json
[
  10,
  9,
  7
]

$..candy.[1:3] | $..candy[1:3]

json
[
  10,
  7
]

jsonpath-ng

https://github.com/h2non/jsonpath-ng

https://pypi.org/project/jsonpath-ng/

pip install jsonpath-ng

pip install jsonpath-ng[ext]（扩展包）

python
import json
from jsonpath_ng.ext import parse


json_string = '{"store": ["xxx"]}'
data = json.loads(json_string)

expression = parse('$.store')
authors = [match.value for match in expression.find(data)]
print(authors) # [['xxx']]

目录

jsonpath

示例

jsonpath-ng