JsonPath
JSON (JavaScript Object Notation) 是一种轻量级的数据交换格式，它使得人们很容易的进行阅读和编写。同时也方便了机器进行解析和生成。适用于进行数据交互的场景，比如网站前台与后台之间的数据交互。
json示例数据
"store"
:
{
"book"
:
[
"category"
:
"reference"
,
"author"
:
"Nigel Rees"
,
"title"
:
"Sayings of the Century"
,
"price"
:
8.95
"category"
:
"fiction"
,
"author"
:
"Evelyn Waugh"
,
"title"
:
"Sword of Honour"
,
"price"
:
12.99
"category"
:
"fiction"
,
"author"
:
"Herman Melville"
,
"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
如果有一个多层嵌套的复杂JSON，想要根据key-value 或下标 的方式去批量获取JSON数据里面的内容，是比较麻烦的。JsonPath模块就能很好的解决这个问题。
JsonPath 以一种简单的方法来提取给定的JSON的内容，JsonPath 支持多种编程语言，如JavaScript、Java、Python、和php。
JsonPath 语法规则
官方文档： https://goessner.net/articles/JsonPath/
JsonPath 提供的JSON解析功能非常强大，它提供了类似正则表达式的语法，基本上可以满足所有想要获得的JSON内容。
JsonPath
"category"
:
"reference"
,
"author"
:
"Nigel Rees"
,
"title"
:
"Sayings of the Century"
,
"price"
:
8.95
"category"
:
"fiction"
,
"author"
:
"Evelyn Waugh"
,
"title"
:
"Sword of Honour"
,
"price"
:
12.99
"category"
:
"fiction"
,
"author"
:
"Herman Melville"
,
"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
# 过滤出所有的包含isbn的书信息
data_book
=
jsonpath
(
res
,
'$..book[?(@.isbn)]'
)
print
(
data_book
)
# 获取店内所有书籍的作者
data_author
=
jsonpath
(
res
,
'$.store.book[*].author'
)
print
(
data_author
)
[{'category': 'fiction', 'author': 'Herman Melville', '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}]
['Nigel Rees', 'Evelyn Waugh', 'Herman Melville', 'J. R. R. Tolkien']
