Java Utililty Methods Date Format

List of utility methods to do Date Format

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Description

The list of methods to do Date Format are organized into topic(s).

Method

StringdateTime2Str(Date date, String pattern)
date Time Str 
if (null == date) {
    return null;
if (null == pattern) {
    pattern = DEFAULT_DATE_TIME_FORMAT;
SimpleDateFormat format = new SimpleDateFormat();
format.applyPattern(pattern);
...
StringdateTime2String(Date value)
date Time String 
if (value != null) {
    SimpleDateFormat dateTime = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
    return dateTime.format(value);
return "";
StringdateTime2StringFs(Date date)
Date ---> String (yyyyMMddHHmmss) 
return date2String(date, "yyyyMMddHHmmss");
StringdateTimeFormat(Date dateTime)
Formats a given date+time value to an ISO 8601 string. 
DateFormat iso8601 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
iso8601.setTimeZone(UTC);
return iso8601.format(dateTime);
StringDateTimeFormat(final Date date)
Date Time Format 
SimpleDateFormat format = new SimpleDateFormat("yyy-MM-dd hh:mm:ss");
return format.format(date);
StringdateTimeFormatterDate(Date date)
date Time Formatter Date 
if (date != null) {
    return dateTimeFormatter.format(date);
return "";
longdateTimeToMillis(String dateTime, String format)
date Time To Millis 
SimpleDateFormat dateFormat = new SimpleDateFormat(format);
try {
    return dateFormat.parse(dateTime).getTime();
} catch (ParseException e) {
    return -1;
StringdateTimeToStr(Date date, String format)
date Time To Str 
String _timeZone = System.getProperty("user.timezone");
TimeZone timeZone = null;
if (_timeZone == null || "".equals(_timeZone) || "UTC".equals(_timeZone)) {
    timeZone = TimeZone.getDefault();
} else {
    timeZone = TimeZone.getTimeZone("Asia/Shanghai");
SimpleDateFormat dateFormat = new SimpleDateFormat(format);
...
StringdateTimeToZuluFormat(DateTime dateTime)
date Time To Zulu Format 
final String ISO_FORMAT = "yyyy-MM-dd'T'HH:mm:ss:SSzzz";
final SimpleDateFormat sdf = new SimpleDateFormat(ISO_FORMAT);
final TimeZone utc = TimeZone.getTimeZone("UTC");
sdf.setTimeZone(utc);
return sdf.format(dateTime.toDate());
StringformatD(Date date)
format D 
SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_STYLE_D);
return sdf.format(date);