jsonpath的使用

JsonPath	描述
$	根節點
@	當前節點
.or[]	子節點
..	選擇所有符合條件的節點
*	所有節點
[]	迭代器標示，如數組下標
[,]	支持迭代器中做多選
[start:end:step]	數組切片運算符
?()	支持過濾操作
()	支持表達式計算

{ "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
    }
  }
}

private static void jsonPathTest() {
    JSONObject json = jsonTest();//調用自定義的jsonTest()方法獲得json對象，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");
      
    //可以提前編輯一個路徑，並多次使用它
    JsonPath path = JsonPath.compile("$.store.book[*]");
    List<Object> books = path.read(json);
}

原博客：https://www.cnblogs.com/rrl92/p/7879004.html