Supporting http://www.sixtree.com.au/articles/2013/data-mapping-with-groovy-part-1/

basic.groovy

// no type declarations needed
// optional semicolins
// literal string syntax
def myList = ['Hello', 'World']

// easy STDOUT printing
// optional method parentheses
println myList

basic.java

import java.util.List;
import java.util.ArrayList;
 
List mylist = new ArrayList<String>();
myList.add("Hello");
myList.add("World");

System.out.println(list);

literals.groovy

// list literal syntax (java.util.List under the hood)
def aList = [1,2,[4,5,6]] 

// map literal syntax (java.util.Map)
def aMap = [
  'name' : 'Tom Smith', 
  'dob' : [
    'year':1980, 
    'month':3, 
    'day': 20
  ]
] 

markup.groovy

def xml = new groovy.xml.MarkupBuilder()
xml.courses(year:"2013") {
  courseName("Software Engineering")
  courseName("Mechanical Engineering")
  courseName("Electronics Engineering")
}

/* OUTPUT

 <courses year='2013'>
  <courseName>Software Engineering</courseName>
  <courseName>Mechanical Engineering</courseName>
  <courseName>Electronics Engineering</courseName>
 </courses>

*/

streaming_markup.groovy

def comment = "<![CDATA[<!-- address is new to this release -->]]>"
def builder = new groovy.xml.StreamingMarkupBuilder()
builder.encoding = "UTF-8"

// MAPPING
def person = {
  // use mkp object which provides features like setting the namespace
  mkp.xmlDeclaration()
  mkp.declareNamespace('xsi':'http://www.w3.org/2001/XMLSchema-instance')
  mkp.declareNamespace('ca':'http://org.org.org/xsd')

  //start with the XML root node closure
  ca.getEnrolledCoursesResponse {
    
  //nested mapping
  student{
    identifier("96678963")
  }
  courseEnrolment {
    status("ACTIVE")
    phoneNumberProvided("true")
    //use mkp object to set the CDATA comment
    mkp.yieldUnescaped(comment)
    }
  }
}

// WRITING
def writer = new StringWriter()
writer << builder.bind(person)
println writer.toString()

/* OUTPUT

<?xml version="1.0" encoding="UTF-8"?>
<ca:getEnrolledCoursesResponse xmlns:ca='http://org.org.org/xsd' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'>
  <student>
   <identifier>96678963</identifier>
  </student>
  <courseEnrolment>
   <status>ACTIVE</status>
   <phoneNumberProvided>true</phoneNumberProvided>
   <![CDATA[<!-- address is new to this release -->]]>
  </courseEnrolment>
</ca:getEnrolledCoursesResponse>

*/