spring DateUtil

public class DateUtil {

private static final String PATTERN_DATE = "yyyy-MM-dd";

private static final String PATTERN_TIME = "HH:mm:ss";

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

private static final String PATTERN_FULL = "yyyy-MM-dd HH:mm:ss.SSS";

public static final Date parse(String pattern, String source) {
try {
return new SimpleDateFormat(pattern, Locale.US).parse(source);
} catch (ParseException e) {
throw new RuntimeException("parse date error : ", e);
}
}

public static final Date parseDateTime(String source) {
try {
return new SimpleDateFormat(PATTERN_DATETIME).parse(source);
} catch (ParseException e) {
throw new RuntimeException("parse date error : ", e);
}
}

public static final Date parseDate(String source) {
try {
return new SimpleDateFormat(PATTERN_DATE).parse(source);
} catch (ParseException e) {
throw new RuntimeException("parse date error : ", e);
}
}

public static final Date parseTime(String source) {
try {
return new SimpleDateFormat(PATTERN_TIME).parse(source);
} catch (ParseException e) {
throw new RuntimeException("parse date error : ", e);
}
}

public static final Date parseFull(String source) {
try {
return new SimpleDateFormat(PATTERN_FULL).parse(source);
} catch (ParseException e) {
throw new RuntimeException("parse date error : ", e);
}
}

public static final String format(String pattern, Date date) {
return new SimpleDateFormat(pattern, Locale.US).format(date);
}

public static final String formatDateTime(Date date) {
return new SimpleDateFormat(PATTERN_DATETIME).format(date);
}

public static final String formatDate(Date date) {
return new SimpleDateFormat(PATTERN_DATE).format(date);
}

public static final String formatTime(Date date) {
return new SimpleDateFormat(PATTERN_TIME).format(date);
}

public static final String formatFull(Date date) {
return new SimpleDateFormat(PATTERN_FULL).format(date);
}

public static final String format(String outPatt, String inPatt, String source) {
return format(outPatt, parse(inPatt, source));
}

public static final String getTimestamp(String pattern) {
return format(pattern, new Date());
}

public static final int calDValueOfYear(Date fromDate, Date toDate) {
Calendar sCal = Calendar.getInstance();
Calendar eCal = Calendar.getInstance();
sCal.setTime(fromDate);
eCal.setTime(toDate);

return eCal.get(Calendar.YEAR) - sCal.get(Calendar.YEAR);
}

public static final int calDValueOfMonth(Date fromDate, Date toDate) {
Calendar sCal = Calendar.getInstance();
Calendar eCal = Calendar.getInstance();
sCal.setTime(fromDate);
eCal.setTime(toDate);

return 12 * (eCal.get(Calendar.YEAR) - sCal.get(Calendar.YEAR)) + (eCal.get(Calendar.MONTH) - sCal.get(Calendar.MONTH));
}

public static final int calDValueOfDay(Date fromDate, Date toDate) {
return (int) ((toDate.getTime() - fromDate.getTime()) / (1000 * 60 * 60 * 24));
}

public static final Date getFirstDayOfMonth(Date date) {
Calendar calendar = Calendar.getInstance();

calendar.setTime(date);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

return calendar.getTime();
}

public static final Date getFirstDayOfWeek(Date date) {
return getFirstDayOfWeek(date, Calendar.MONDAY);
}

public static final Date getLastDayOfWeek(Date date) {
return getLastDayOfWeek(date, Calendar.MONDAY);
}

public static final Date getFirstDayOfWeek(Date date, int firstDayOfWeek) {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(firstDayOfWeek);

calendar.setTime(date);
calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

return calendar.getTime();
}

public static final Date getLastDayOfWeek(Date date, int firstDayOfWeek) {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(firstDayOfWeek);

calendar.setTime(date);
calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

calendar.add(Calendar.DAY_OF_YEAR, 7);
calendar.add(Calendar.MILLISECOND, -1);

return calendar.getTime();
}

public static final Date[] getWeek(Date date) {
return getWeek(date, Calendar.MONDAY);
}

public static final Date[] getWeek(Date date, int firstDayOfWeek) {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(firstDayOfWeek);

calendar.setTime(date);
calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
Date firstDate = calendar.getTime();

calendar.add(Calendar.DAY_OF_YEAR, 7);
calendar.add(Calendar.MILLISECOND, -1);
Date lastDate = calendar.getTime();

return new Date[] { firstDate, lastDate };
}

public static java.sql.Date toSQLDate(Date date) {
return new java.sql.Date(date.getTime());
}

public static java.sql.Date getSQLDate() {
return new java.sql.Date(System.currentTimeMillis());
}

public static java.sql.Timestamp getSQLTimestamp() {
return new java.sql.Timestamp(System.currentTimeMillis());
}

public static java.sql.Timestamp getTimestamp(int day) {
return new java.sql.Timestamp(System.currentTimeMillis()+24*60*60*1000*day);
}

public static Date add(Date date, int field, int increment) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);

cal.add(field, increment);
return cal.getTime();
}

public static Date set(Date date, int field, int value) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(field, value);
return cal.getTime();
}

public static  Long getMillisTime(){
return System.currentTimeMillis();
}

public static void main(String[] args) {
/*System.out.println(DateUtil.getTimestamp("yyyyMMdd"));

String str=DateUtil.formatDate(DateUtil.add(new Date(), Calendar.DAY_OF_YEAR, -30));
System.out.println(str);*/
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
df.format(new Date(1440000660125L));
System.out.println(Timestamp.valueOf(df.format(new Date(1440000660125L))));
}

}