In Groovy we have useful classes to parse JSON and XML: JsonSlurper and XmlSlurper. Groovy 3 adds the YamlSlurper class to read in YAML formatted strings. The result of parsing the YAML content is a Map object.

In the next example we have a sample YAML as string that we parse using the parseText method of YamlSlurper:

Groovy 3 adds the YamlBuilder class to create YAML output using a Groovy syntax. The YamlBuilder is closely related to JsonBuilder that is described in a previous post. We define a hierarchy using a builder syntax where we can use primitive types, strings, collections and objects. Once we have build our structure we can use the toString() method to get a string representation in YAML format.

In the following example we use YamlBuilder to create YAML: