語(yǔ)法：

JsonPath	描述
$	根節(jié)點(diǎn)
@	當(dāng)前節(jié)點(diǎn)
.or[]	子節(jié)點(diǎn)
..	選擇所有符合條件的節(jié)點(diǎn)
*	所有節(jié)點(diǎn)
[]	迭代器標(biāo)示，如數(shù)組下標(biāo)
[,]	支持迭代器中做多選
[start:end:step]	數(shù)組切片運(yùn)算符
?()	支持過(guò)濾操作
()	支持表達(dá)式計(jì)算

?

需要的jar包：

commons-lang-2.6.jar json-path-0.8.1.jar json-smart-1.1.1.jar

對(duì)于如下的json，通過(guò)實(shí)例介紹JsonPath的使用

{ "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,"isbn": "0-553-21311-3"}],"bicycle": {"color": "red","price": 19.95}} }

代碼：

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privatestatic voidjsonPathTest() {????JSONObject json = jsonTest();//調(diào)用自定義的jsonTest()方法獲得json對(duì)象，生成上面的json?????????//輸出book[0]的author值????String author = JsonPath.read(json,"$.store.book[0].author");?????????//輸出全部author的值，使用Iterator迭代????List<String> authors = JsonPath.read(json,"$.store.book[*].author");?????????//輸出book[*]中category == 'reference'的book????List<Object> books = JsonPath.read(json,"$.store.book[?(@.category == 'reference')]");???????????????????????//輸出book[*]中price>10的book????List<Object> books = JsonPath.read(json,"$.store.book[?(@.price>10)]");?????????//輸出book[*]中含有isbn元素的book????List<Object> books = JsonPath.read(json,"$.store.book[?(@.isbn)]");?????????//輸出該json中所有price的值????List<Double> prices = JsonPath.read(json,"$..price");?????????//可以提前編輯一個(gè)路徑，并多次使用它????JsonPath path = JsonPath.compile("$.store.book[*]");????List<Object> books = path.read(json);}

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