A twist on the prior example, this will create multiple issues- first an Epic and then a Task.

create-issues-from-confluence2.groovy

import com.atlassian.applinks.api.ApplicationLinkService
import com.atlassian.applinks.api.application.jira.JiraApplicationType
import com.atlassian.sal.api.component.ComponentLocator
import com.atlassian.sal.api.net.Response
import com.atlassian.sal.api.net.ResponseException
import com.atlassian.sal.api.net.ResponseHandler
import groovy.json.JsonBuilder
import groovy.json.JsonSlurper

import static com.atlassian.sal.api.net.Request.MethodType.POST

// Define all the issues we want to create as variables
String body = new JsonBuilder([fields: [
    project : [key: "PROJECT"],"customfield_10002" : "Epic 22",summary : "Epic 22",issuetype : [id: 10000L]
    ]]).toString()
Map phases = ["Intake":"", "Assess":"", "Report":""]

// This function will iterate over collections to create API request bodies for new issues
String reqBodyBuilder(String summ, String desc, Long issType) {
    String body = new JsonBuilder([
        fields: [
            project : [key: "PROJECT"],
            summary : summ,
            description : desc,
            issuetype : [id: issType]
        ]
    ]).toString()
    return body
}

// This function will actually execute each request
def requester(String body) {
    def appLinkService = ComponentLocator.getComponent(ApplicationLinkService)
    def appLink = appLinkService.getPrimaryApplicationLink(JiraApplicationType)
    def applicationLinkRequestFactory = appLink.createAuthenticatedRequestFactory()
    def request = applicationLinkRequestFactory.createRequest(POST, "/rest/api/2/issue")
    	.addHeader("Content-Type", "application/json")
    	.setEntity(body)
    request.execute()
}

// First, create the Epic
requester(body)

// Now create all the Tasks for the phases
phases.each { key, value ->
    String bod = reqBodyBuilder(key, value, 10002L)
    requester(bod)
}

// Now create all the Sub-tasks for the actual tasks that need to be completed
// TBD