Groovy - Convert object to JSON string

I'm pretty used to Grails converters, where you can convert any object to a JSON representation just like this (http://grails.org/Converters+Reference)

return foo as JSON

But in plain groovy, I cannot find an easy way to do this (http://groovy-lang.org/json.html)

JSONObject.fromObject(this)

return empty json strings...

Am I missing an obvious Groovy converter ? Or should I go for jackson or gson library ?

json
groovy

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最佳答案

Do you mean like:

import groovy.json.*


class Me {
String name
}


def o = new Me( name: 'tim' )


println new JsonBuilder( o ).toPrettyString()

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You can use JsonBuilder for that.

Example Code:

import groovy.json.JsonBuilder


class Person {
String name
String address
}


def o = new Person( name: 'John Doe', address: 'Texas' )


println new JsonBuilder( o ).toPrettyString()

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I couldn't get the other answers to work within the evaluate console in Intellij so...

groovy.json.JsonOutput.toJson(myObject)

This works quite well, but unfortunately

groovy.json.JsonOutput.prettyString(myObject)

didn't work for me.

To get it pretty printed I had to do this...

groovy.json.JsonOutput.prettyPrint(groovy.json.JsonOutput.toJson(myObject))