漂亮的打印 json 字符串

import groovy.json.JsonOutput;

def json = JsonOutput.toJson([foo: 'bar', baz: [1]])

assert json == '{"foo":"bar","baz":[1]}'

def pretty = JsonOutput.prettyPrint(json)

assert pretty == '''{
    "foo": "bar",
    "baz": [
        1
    ]
}'''