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, "$.store.book[0].author"); //输出全部author的值,使用Iterator迭代 List<String> authors = JsonPath.read(json, "$.store.book[*].author"); //输出book[*]中category == 'reference'的book List<Object> books = JsonPath.read(json, "$.store.book[?(@.category == 'reference')]"); //输出book[*]中price>10的book List<Object> books = JsonPath.read(json, "$.store.book[?(@.price>10)]"); //输出book[*]中含有isbn元素的book List<Object> books = JsonPath.read(json, "$.store.book[?(@.isbn)]"); //输出该json中所有price的值 List<Double> prices = JsonPath.read(json, "$..price"); //可以提前编辑一个路径,并多次使用它 JsonPath path = JsonPath.compile("$.store.book[*]"); List<Object> books = path.read(json); }
语法:
JsonPath |
描述 |
$ |
根节点 |
@ |
当前节点 |
.or[] |
子节点 |
.. |
选择所有符合条件的节点 |
* |
所有节点 |
[] |
迭代器标示,如数组下标 |
[,] |
支持迭代器中做多选 |
[start:end:step] |
数组切片运算符 |
?() |
支持过滤操作 |
() |
支持表达式计算
|
原文地址:http://www.cnblogs.com/weilunhui/p/3857366.html