Groovy - Convert an object to a JSON string

Question

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

return foo as JSON 

But in normal groovy, I cannot find an easy way to do this ( http://groovy.codehaus.org/gapi/groovy/json/JsonOutput.html )

 JSONObject.fromObject(this) 

returns empty json strings ...

Did I miss the obvious Groovy converter? Or should I go to jackson or the gson library?

Answer 1

Do you mean:

 import groovy.json.* class Me { String name } def o = new Me( name: 'tim' ) println new JsonBuilder( o ).toPrettyString() 

Answer 2

I could not get other answers to work in the evaluation console in Intellij, so ...

 groovy.json.JsonOutput.toJson(myObject) 

This works fine, but unfortunately

 groovy.json.JsonOutput.prettyString(myObject) 

didn't work for me.

To make it pretty printed, I had to do it ...

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

Answer 3

You can use JsonBuilder for this.

Code example:

 import groovy.json.JsonBuilder class Person { String name String address } def o = new Person( name: 'John Doe', address: 'Texas' ) println new JsonBuilder( o ).toPrettyString()