jsonPath 的使用记录

{
  "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 books = JsonPath.read(json, "$.store.book[?(@.category == 'reference')]");              

    //输出book[*]中price>10的book
    List books = JsonPath.read(json, "$.store.book[?(@.price>10)]");

    //输出book[*]中含有isbn元素的book
    List books = JsonPath.read(json, "$.store.book[?(@.isbn)]");

    //输出该json中所有price的值
    List prices = JsonPath.read(json, "$..price");

    //可以提前编辑一个路径，并多次使用它
    JsonPath path = JsonPath.compile("$.store.book[*]");

    List books = path.read(json);

}