자바 개발할 때 json 파싱은 사실 상 헬이다..


Apache Nifi에서 사용하고 있는 JsonPath(https://github.com/json-path/JsonPath)는 성능도 괜찮고, 캐시 기능이 있어서 여러 번 파싱하지 않아도 되고... 조건 검색, REGEX 검색도 가능하고 아주 쓸만하다.



예제는 홈피에 있다. (scala의 json4s보다 훨 나은 느낌이다..)

Path Examples

Given the json

{
    "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 (click link to try)Result
$.store.book[*].authorThe authors of all books
$..authorAll authors
$.store.*All things, both books and bicycles
$.store..priceThe 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 every thing
$..book.length()The number of books


Posted by 김용환 '김용환'