应用谓词后从 JSONPath 数组结果中获取特定对象

Get specific object from JSONPath array result after predicate is applied

在 JSONPath 0.9.1 中，以下 Json 路径有效：

http://jsonpath.herokuapp.com/?path=$.store.book[?(@.author==\\'Nigel Rees\\')][0]

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{
"category" :"reference",
"author" :"Nigel Rees",
"title" :"Sayings of the Century",
"price" : 8.95
}

我已升级到最新版本 (2.3)，现在查询返回空数组。

这是一个错误还是从结果数组中检索元素的方式发生了变化？

鉴于此文件：

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{
"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
},
{
"category":"fiction",
"author":"Herman Melville",
"title":"Moby Dick",
"isbn":"0-553-21311-3",
"price": 8.99
},
{
"category":"fiction",
"author":"J. R. R. Tolkien",
"title":"The Lord of the Rings",
"isbn":"0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color":"red",
"price": 19.95
}
},
"expensive": 10
}

使用 JsonPath 2.3.0，以下代码返回 JSONArray(而不是 Object[])：

1	JsonPath.parse(JSON).read("$.store.book[?(@.author=="Nigel Rees")]");

所以，下面的代码...

1 2	JSONArray read = JsonPath.parse(JSON).read("$.store.book[?(@.author=="Nigel Rees")]"); System.out.println(read.get(0));

... 将打印：

1	{category=reference, author=Nigel Rees, title=Sayings of the Century, price=8.95}