java - JSONpath 中的 && 运算符 ()

Question

下面是来自 tutorial 的示例 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
            },
            {
                "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
}

我正在尝试检查具有以下条件的对象

$..[?(@.price == 12.99 && @.title == 'Moby Dick')]

应该如下所示找回我。但是，它只显示[]。

{
                "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
            },

是否有任何关于查询中出现错误的指示？

Answer 1

您应该使用 || 而不是 &&，因为您想要具有任一价格的对象(而不是两者，这是不可能的):

$..[?(@.price == 12.99 || @.price == 8.99)]