Converting JSON Request Data to Form Data

import org.apache.http.HttpResponse
import org.apache.http.client.methods.HttpPost
import org.apache.http.entity.mime.MultipartEntityBuilder
import org.apache.http.entity.ContentType
import org.apache.http.impl.client.HttpClients
import org.apache.http.util.EntityUtils
import org.apache.http.message.BasicHeader
import groovy.json.JsonSlurper

def post = new HttpPost('http://test.com/api/v1/ServiceRequest/NewRequest')
def entityBuilder = MultipartEntityBuilder.create()
def boundary = "----WebKitFormBoundary7MA4YWxkTrZu0gW"
entityBuilder.setBoundary(boundary)

//JSON request is converted to JSON Object
def slurper = new JsonSlurper()
def params = slurper.parseText(requestBodyTextToTargetAPI)

//Dynamic addition to form data for each key and value in JSON
params.each { key, value ->
    entityBuilder.addTextBody(""+key, ""+value, ContentType.TEXT_PLAIN)
}

//Other header information is entered if necessary
post.addHeader(new BasicHeader('ApiKey', '##################################'))
post.setEntity(entityBuilder.build())

def client = HttpClients.createDefault()
def response

try {
    response = client.execute(post)
    //By interrupting the flow with the result of the request, the response can be redirected by filling the following variables, or the necessary business logic can be executed on the result.
    statusCodeToTargetAPI = response.getStatusLine().getStatusCode();
    requestErrorMessageToTargetAPI = EntityUtils.toString(response.getEntity());
} finally {
    response?.close()
    client?.close()
}