Groovy: Convert String / Map to Jsonobject

You can parse json string to map and then create org.json.simple.JSONObject instance from this map:

//org.json.simple.JSONObject dependency
@Grapes(
    @Grab(group='com.googlecode.json-simple', module='json-simple', version='1.1')
)

import groovy.json.JsonSlurper
import org.json.simple.JSONObject

def stringJson =  '''{"Student": {"Name": "","age": null}}'''

//parse json string to map
Map json = new JsonSlurper().parseText(stringJson)
//build JSONObject instance from map
JSONObject jsonObject = new JSONObject(json)

Here is my answer.

import org.json.simple.JSONObject

import groovy.json.JsonSlurper

def stringJson = '''{"Student": {"Name": "","age":""}}'''

def resultJson =new JsonSlurper().parseText(stringJson)

JSONObject jsonObject = new JSONObject(resultJson)

println jsonObject