JSONPath

1. What's it?
JSONPath is a tool for quickly filtering from JSON data.
Filter JSON data
Operator
Operator
Description
$
The root element to query. This starts all path expressions.
@
The current node is being processed by a filter predicate.
*
Wildcard. Available anywhere a name or numeric are required.
..
Deep scan. Available anywhere a name is required.
.<name>
Dot-notated child
['<name>' (, '<name>')]
Bracket-notated child or children
[<number> (, <number>)]
Array index or indexes
[start:end]
Array slice operator
[?(<expression>)]
Filter expression. The expression must evaluate to a boolean value.
Filter Operators
Filters are logical expressions used to filter arrays. A typical filter would be [?(@.age > 18)] where @ represents the current item being processed.
Operator
Description
==
left is equal to the right (note that 1 is not equal to '1')
!=
left is not equal to the right
<
left is less than right
<=
left is less or equal to the right
>
left is greater than right
>=
left is greater than or equal to the right
=~
left matches regular expression [?(@.name =~ /foo.*?/i)]
in
left exists in right [?(@.size in ['S', 'M'])]
nin
left does not exists in right
subsetof
left is a subset of right [?(@.sizes subsetof ['S', 'M', 'L'])]
anyof
left has an intersection with right [?(@.sizes anyof ['M', 'L'])]
noneof
left has no intersection with right [?(@.sizes noneof ['M', 'L'])]
size
size of left (array or string) should match right
empty
left (array or string) should be empty
Path Examples
Given the JSON Data.
{
    "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
        }
    },
    "expensive": 10
}
JsonPath
Result
$.store.book[*].author
The authors of all books
$..author
All authors
$.store.*
All things, both books and bicycles
$.store..price
The price of everything
$..book[2]
The third book
$..book[-2]
The second to last book
$..book[0,1]
The first two books
$..book[:2]
All books from index 0 (inclusive) until index 2 (exclusive)
$..book[1:2]
All books from index 1 (inclusive) until index 2 (exclusive)
$..book[-2:]
Last two books
$..book[2:]
Book number two from tail
$..book[?(@.isbn)]
All books with an ISBN number
$.store.book[?(@.price < 10)]
All books in store cheaper than 10
$..book[?(@.price <= $['expensive'])]
All books in store that are not "expensive"
$..book[?(@.author =~ /.*REES/i)]
All books matching regex (ignore case)
$..*
Give me everything
$..book.length()
The number of books
Reference
​https://github.com/json-path/JsonPath​

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Operator	Description
`$`	The root element to query. This starts all path expressions.
`@`	The current node is being processed by a filter predicate.
`*`	Wildcard. Available anywhere a name or numeric are required.
`..`	Deep scan. Available anywhere a name is required.
`.<name>`	Dot-notated child
`['<name>' (, '<name>')]`	Bracket-notated child or children
`[<number> (, <number>)]`	Array index or indexes
`[start:end]`	Array slice operator
`[?(<expression>)]`	Filter expression. The expression must evaluate to a boolean value.

Operator	Description
==	left is equal to the right (note that 1 is not equal to '1')
!=	left is not equal to the right
<	left is less than right
<=	left is less or equal to the right
>	left is greater than right
>=	left is greater than or equal to the right
=~	left matches regular expression [?(@.name =~ /foo.*?/i)]
in	left exists in right [?(@.size in ['S', 'M'])]
nin	left does not exists in right
subsetof	left is a subset of right [?(@.sizes subsetof ['S', 'M', 'L'])]
anyof	left has an intersection with right [?(@.sizes anyof ['M', 'L'])]
noneof	left has no intersection with right [?(@.sizes noneof ['M', 'L'])]
size	size of left (array or string) should match right
empty	left (array or string) should be empty

JsonPath	Result
$.store.book[*].author	The authors of all books
$..author	All authors
$.store.*	All things, both books and bicycles
$.store..price	The price of everything
$..book[2]	The third book
$..book[-2]	The second to last book
$..book[0,1]	The first two books
$..book[:2]	All books from index 0 (inclusive) until index 2 (exclusive)
$..book[1:2]	All books from index 1 (inclusive) until index 2 (exclusive)
$..book[-2:]	Last two books
$..book[2:]	Book number two from tail
$..book[?(@.isbn)]	All books with an ISBN number
$.store.book[?(@.price < 10)]	All books in store cheaper than 10
$..book[?(@.price <= $['expensive'])]	All books in store that are not "expensive"
$..book[?(@.author =~ /.*REES/i)]	All books matching regex (ignore case)
$..*	Give me everything
$..book.length()	The number of books