Converting a date from one format to other in Mirth.

function getDateFromUnixTimeStamp(timeStamp){
var t = new java.util.Date(timeStamp*1000);
var dateFromUnixTimeStamp = DateUtil.convertDate("EEE MMM dd HH:mm:ss zzz yyyy", "yyyy-MM-dd hh:mm:ss", t);
return dateFromUnixTimeStamp;
}