how to parse json using groovy

Have you tried using JsonSlurper?

Example usage:

def slurper = new JsonSlurper()def result = slurper.parseText('{"person":{"name":"Guillaume","age":33,"pets":["dog","cat"]}}')assert result.person.name == "Guillaume"assert result.person.age == 33assert result.person.pets.size() == 2assert result.person.pets[0] == "dog"assert result.person.pets[1] == "cat"

That response is a Map, with a single element with key '212315952136472'. There's no 'data' key in the Map. If you want to loop through all entries, use something like this:

JSONObject userJson = JSON.parse(jsonResponse)userJson.each { id, data -> println data.link }

If you know it's a single-element Map then you can directly access the link:

def data = userJson.values().iterator().next()String link = data.link

And if you knew the id (e.g. if you used it to make the request) then you can access the value more concisely:

String id = '212315952136472'...String link = userJson[id].link

You can convert JSON to the desired type in Groovy using as operator:

import groovy.json.JsonSlurperString json = '''{  "name": "John",    "age": 20}'''def person = new JsonSlurper().parseText(json) as Person with(person) {    assert name == 'John'    assert age == 20}