Android使用SimpleDateFormat将字符串解析为日期

Question

I have String dateOrder= '2014-09-28' , i want to change format with SimpleDateFormat. but this is cannot formated.. how to solve ?
this my code

SimpleDateFormat date = new SimpleDateFormat("dd/MM/yy");
        String dateOrder = fill_order_in.get(Variabel.KEY_DATE_ORDER);
        try {
            Date d = date.parse(dateOrder);
            dateOrder = date.format(d);
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

Answer 1

Try changing the first line to

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

You can use this for the parse . Then you need another SimpleDateFormat("dd/MM/yy") for formatting the new version.

The key point is that the parsing needs to be done with one pattern, and the formatting needs to be done with another. So rather than just creating one SimpleDateFormat instance, you need two, with different patterns: one for parsing, and one for formatting.

Answer 2

I believe you want something like this:

    //first create an object that will parse your date as you have it ie 2014-09-28
    SimpleDateFormat date = new SimpleDateFormat("yyyy-MM-dd");
    String dateOrder = fill_order_in.get(Variabel.KEY_DATE_ORDER);
    try {
        Date d = date.parse(dateOrder);
        //then use a different object to format the date as you want it ie 9/28/2014
        dateOrder = new SimpleDateFormat("dd/MM/yy").format(d);
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }