CODEWITHSUNDEEP
javascriptjavajson
David Velasquez
David Velasquez

Reputation: 2366

Remove the javascript object variable name text from json code

I have a String variable that stores the literal text of a JavaScript object:

String jsString = "mainData = {"name":"John", "id":"12345"}"

Is there a JSON method (or any method) in Java that will remove the "mainData = " part of the string in order to leave only the JavaScript data? Something like this:

newString = someMethod(jsString);
JSONObject jsonObject = new JSONObject(newString); //newString = "{"name":"John", "id":"12345"}"

Upvotes: 0

Views: 164

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1073978

There's String#replaceFirst:

jsString = jsString.replaceFirst("^[^{]+", "");

Live Example

That will remove any characters as the start of the string prior to the first {. It makes the assumption that the string contains JSON where the outermost thing is an object (as opposed to an array or just a value), although it could readily be tweaked not to make that assumption. For instance, this version:

jsString = jsString.replaceFirst("^\\s*[A-Za-z0-9_$]+\\s*=\\s*", "");

Live Example

That removes a series of letters, numbers, _, or $, optionally surrounded by whitespace, and a following =, possibly followed by whitespace, at the beginning of the string. Now, that's not a complete list of valid JavaScript identifier characters (that list is long), but you get the idea.

Upvotes: 3

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