Custom Date tag: custom date based on pattern format. Default date is current day.
<CUSTOMDATE[+,-][value][scale],Pattern>
User can define the date format by customize the parameter Pattern.
Scale is only recognized within below option:
“Y” for year, “M” for month, “D” for day
Sample:
Suppose today is 16 Dec 2014
<CUSTOMDATE+1M,MMM yyyy> return as “Jan 2015”
<CUSTOMDATE-1D,ddMMyyyy> return as “15122015”
<CUSTOMDATE-2Y,dd*MMMMyyyy> return as “16*December2012”
/**
* @param input
* <CUSTOMDATE[+,-][number][scale],Pattern>
* @return custom date based on pattern format. default date is current day
*/
private String customDate(String input) {
input = input.substring(1, input.length() - 1);
String pattern = input.split(",")[1].trim();
input = input.split(",")[0].trim();
Date now = new Date();
SimpleDateFormat ft = new SimpleDateFormat(pattern);
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(now);
int len = "CUSTOMDATE".length();
if (input.length() == len) {
return ft.format(now);
} else if (input.length() < len) {
return "The format you input is incorrect! Please make sure the format is <CUSTOMDATE[+,-][number][scale],Pattern>";
} else {
String math = input.substring(len, len + 1);
int value = Integer.parseInt(input.substring(len + 1,
input.length() - 1));
String scale = input.substring(input.length() - 1);
if (math.equals("-")) {
value = -value;
} else if (!math.equals("+")) {
return "Math is wrong. Can only use +/-.";
}
int field = 0;
if (scale.equalsIgnoreCase("Y")) {
field = 1;
} else if (scale.equalsIgnoreCase("M")) {
field = 2;
} else if (scale.equalsIgnoreCase("D")) {
field = 5;
}
if (field == 0) {
return "The scale is wrong. Can only use Y/M/D.";
}
gc.add(field, value);
}
return ft.format(gc.getTime());
}