How to deserialize json using groovy

Question

I am trying to parse a JSON file using groovy. Json:

{
    "Node1": {
        "Environment": "NPR",
        "OS": "linux",
        "Policy_Group": "abc"
    },
    "Node2": {
        "Environment": "NPR",
        "OS": "linux",
        "Policy_Group": "xyz"
    }
}

How can I fetch the values of Environment, OS, Policy_Group using groovy.

I am trying below but its not woring

serverJson[serverLabel].each { serverData ->
print serverData.Environment
print serverData."Environment"
}

where serverlabel is the Node1 , Node2 and serverJson is the json file

Answer 1

File file = new File("path_to_file\\example.json");
slurperResponse = new JsonSlurper().parse(file);

slurperResponse.each{
    it -> 
      print (it.getValue().get("Environment"));
      print (it.getValue().get("OS"));
}

Here 'it' is an implicit variable. Check documentation

These are the imports you will need;

import groovy.json.JsonSlurper;