我需要使用不确定路径从 json 路径获取原始数据类型

Question

鉴于此文档：

{
    "slide": [{
        "title": {
            "fontName": "Open Sans",
            "top": 188,
            "left": -22,
            "width": 597,
            "fontSize": 45,
            "valign": "bottom",
            "presetType": "Parallelogram",
            "fill": "#6bcad5",
            "halign": "left",
            "fontColor": "#f4dde6",
            "height": 192
        }
    }, {
        "picture": {
            "top": 25,
            "left": 54,
            "width": 1,
            "colorMode": "GRAYSCALE",
            "presetType": "Snip_Same_Side_Rect",
            "height": 1
        }
    }]
}

以下代码returns[54]:

JSONArray obj = ctx.read("$.slide[?(@.picture)].picture.left");

但我需要一个原始类型，仍然保持无限路径。

Answer 1

根据the docs：

Please note, that the return value of jsonPath is an array, which is also a valid JSON structure. So you might want to apply jsonPath to the resulting structure again or use one of your favorite array methods as sort with it.

注意：如果您正在使用 Java 实现，那么已经为此提出了 issue 并且对该问题的回应重申了上述观点。

因此，只要您使用过滤器，就需要两次调用，例如：

String json = "...";

DocumentContext ctx = JsonPath.parse(json);

// capture the JSONArray
JSONArray obj = ctx.read("$.slide[?(@.picture)].picture.left");

// read the first value from the JSONArray
// prints "54"
System.out.println(obj.get(0)); 

// alternatively, push the JSON representation of the JSONArray back through JsonPath
Integer value = JsonPath.read(obj.toJSONString(), "$[0]");
// prints 54
System.out.println(value);

我需要使用不确定路径从 json 路径获取原始数据类型

I need to get the primitive data type from json path using in-definite path

json

jsonpath

jpath