JSONUtil Embedded Objects¶
A JSONUtil embedded object provides JSON object methods.
Methods¶
Method | Description | Example |
|---|---|---|
Object parse(String jsonStr) | Converts a JSON character string into an object. | Assume that variable a is a JSON string. Use the following EL expression to convert the JSON string into an object: #{JSONUtil.parse(a)} |
String toString(Object jsonObject) | Converts an object to a JSON character string. | Assume that variable b is an object. Use the following EL expression to convert the object into a JSON string: #{JSONUtil.toString(b)} |
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. | The content of variable str is as follows: {
"cities": [{
"name": "city1",
"areaCode": "1000"
},
{
"name": "city2",
"areaCode": "2000"
},
{
"name": "city3",
"areaCode": "3000"
}]
}
The expression for obtaining the area code of city1 is as follows: #{JSONUtil.path(str,"cities[0].areaCode")}
|
Example¶
The content of variable str is as follows:
{
"cities": [{
"name": "city1",
"areaCode": "1000"
},
{
"name": "city2",
"areaCode": "2000"
},
{
"name": "city3",
"areaCode": "3000"
}]
}
The expression for obtaining the area code of city1 is as follows:
#{JSONUtil.path(str,"cities[0].areaCode")}