Programming Groovy 2

17.2 Building JSON

Groovy provides convenient solutions for when we’re creating web services and need to generate a JSON-formatted object.[36] Its as simple as sending our instances to ​groovy.json.JsonBuilder​’s constructor, and the builder takes care of the rest. We can write the generated JSON format to a ​Writer​ by calling the ​writeTo​ method, as in the next example.

class Person {
  String first
  String last
  def sigs
  def tools
}
john = new Person(first: "John", last: "Smith",
  sigs: ['Java', 'Groovy'], tools: ['script': 'Groovy', 'test': 'Spock'])
bldr = new groovy.json.JsonBuilder(john)
writer = new StringWriter()
bldr.writeTo(writer)
println writer

The builder ...