java - 从字符串中解析日期

Question

我有这样的字符串:

String strDateTimeStamp = "2016-02-29 18:31:51";

现在我想提取它以获得以下格式的结果:

String strYear = "2016";
String strMonth = "02";
String strDate = "29";
String strHour = "18";
String strMinute = "31";
String strSecond = "51";

Answer 1

如果您正在处理日期，则应考虑使用日历:

    String strDateTimeStamp = "2016-02-29 18:31:51";
    DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
    Date date = sdf.parse(strDateTimeStamp);
    Calendar cal = new Calendar.Builder().setInstant(date).build();

    String strYear = Integer.toString(cal.get(Calendar.YEAR));
    // Calendar MONTH is starting from 0 we need to add 1
    String strMonth = Integer.toString(cal.get(Calendar.MONTH) + 1);
    String strDate = Integer.toString(cal.get(Calendar.DATE));

    String strHour = Integer.toString(cal.get(Calendar.HOUR_OF_DAY));
    String strMinute = Integer.toString(cal.get(Calendar.MINUTE));
    String strSecond = Integer.toString(cal.get(Calendar.SECOND));