Question

For example,the input parameters are 2011-01-01 and 2012-01-01,
and I want to parse this period day by day like 2011-01-01~2011-01-02, 2011-01-02~2011-01-03…
Finally,store them in a array of String?

Thanks in advance.

Answer 1

For parsing the date from a string, I recommend using SimpleDateFormat.

That way you will obtain a Date object. Use the Date object to create a GregorianCalendar.

Then, you can use GregorianCalendar’s add method to increase it one day at a time until you reach your end date.

Here’s a code example:

String dateString1 = "2011-01-01";
String dateString2 = "2012-01-01";

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

List<String> dates = new ArrayList<String>();

Date startDate = dateFormat.parse(dateString1);
Date endDate = dateFormat.parse(dateString2);

GregorianCalendar calendar = new GregorianCalendar();
calendar.setTime(startDate);
while (calendar.getTime().before(endDate)) {
    dates.add(dateFormat.format(calendar.getTime()));
    calendar.add(Calendar.DAY_OF_MONTH, 1);
}

This puts your dates in a list. You can convert it to an array like this:

String[] datesArray = dates.toArray(new String[0]);