jsonpath使用方法

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

private static void jsonPathTest() {
    JSONObject json = jsonTest();//调用自定义的jsonTest()方法获得json对象，生成上面的json
     
    //输出book[0]的author值
    String author = JsonPath.read(json, "$.store.book[0].author");
     
    //输出全部author的值，使用Iterator迭代
    List authors = JsonPath.read(json, "$.store.book[*].author");
     
    //输出book[*]中category == 'reference'的book
    List