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Help Center/ Data Lake Factory/ User Guide/ References/ EL/ JSONUtil Embedded Objects

JSONUtil Embedded Objects

Updated on 2022-02-22 GMT+08:00

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A JSONUtil embedded object provides JSON object methods.

Methods

**Table 1** Method description
Method	Description
Object parse(String jsonStr)	Converts a JSON character string into an object.
String toString(Object jsonObject)	Converts an object to a JSON character string.
Object path(String jsonStr,String jsonPath)	Returns the field value in a path specified by the JSON character string. This method is similar to XPath and can be used to retrieve or set JSON by path. You can use . or [] in the path to access members and values. For example, tables[0].table_name.

Example

The content of variable str is as follows:

{
            "cities": [{
                        "name": "Shenzhen",
                        "areaCode": "0755"
            },
            {
                        "name": "city2",
                        "areaCode": "010"
            },
            {
                        "name": "Shanghai",
                        "areaCode": "021"
            }]
}

The expression for obtaining the area code of Shenzhen is as follows:

#{JSONUtil.path(str,"cities[0].areaCode")}

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