本文是在開發中經常會使用的日期時間操作類

public class AppsDateUtil {

    private static String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";

    public static String getStringFromDate(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT,Locale.CHINA);
        String dateStr = sdf.format(date);
        return
 
 dateStr;
    }

    public static Date getDateFromString(String string){
        SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT,Locale.CHINA);
        Date date = null;
        try {
            date = sdf.parse(string);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return
 
 date;
    }

    public static String getStringFromDate(Date date,String template){
        SimpleDateFormat sdf = new SimpleDateFormat(template,Locale.CHINA);
        String dateStr = sdf.format(date);
        return dateStr;
    }

    public static Date getDateFromString(String string,String template){
        SimpleDateFormat sdf =
 
 new SimpleDateFormat(template,Locale.CHINA);
        Date date = null;
        try {
            date = sdf.parse(string);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date;
    }

    public static String getStringFromDateString(String date,int length){
        try{
            String subString = date.substring(0,length);
            return subString;
        }catch(Exception ex){
            ex.printStackTrace();
        }
        return "";
    }

    public static long getTimeIntervalFromString(String date){
        Date d = getDateFromString(date);
        return d.getTime();
    }

    public static long getTimeIntervalFromString(String date,String dateFormat){
        Date d = getDateFromString(date,dateFormat);
        return d.getTime();
    }

    public static boolean within(String date,long timeGap){
        Date d1 = new Date();
        Date d2 = getDateFromString(date,"yyyy-MM-dd");
        if(d1.getTime() - d2.getTime() < timeGap){
            return true;
        }
        return false;
    }

    public static String timeStampString(){
        Date now = new Date();
        String s = getStringFromDate(now,"yyyyMMddHHmmss");
        return s;
    }

    public static String getCurrentTime(String format) {
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat(format, Locale.getDefault());
        String currentTime = sdf.format(date);
        return currentTime;
    }

    public static String getCurrentTime() {
        return getCurrentTime("yyyy-MM-dd  HH:mm:ss");
    }

}