import java.util.Calendar;
import java.util.Date;
public class Util{
public static String dateToIsoDateTime(String date)
{
StringBuffer sb = new StringBuffer(date);
if (date.length() >= 8)
{
//20070101 -> 2007-01-01
//insert hyphens between year, month, and day
sb.insert(4, '-');
sb.insert(7, '-');
//2007-01-01T173012 -> 2007-01-01T17:30:12
if (date.length() >= 15)
{
//insert colons between hours, minutes, and seconds
sb.insert(13, ':');
sb.insert(16, ':');
//2007-01-01T17:30:12 -> 2007-01-01T17:30:12.000
//append milliseconds
if (sb.toString().length() > 19)
sb.insert(20, ".000");
else
sb.append(".000");
//2007-01-01T17:30:12.000 -> 2007-01-01T17:30:12.000Z
//append UTC indicator if exists
if (date.length() > 15 && date.charAt(15) == 'Z')
sb.append('Z');
}
if (sb.length() > 19) sb.setLength(19);
}
return sb.toString();
}
}