DateFormatUtils (Apache Commons Lang 3.4 API)

java.lang.Object
- org.apache.commons.lang3.time.DateFormatUtils

```
public class DateFormatUtils
extends Object
```
Date and time formatting utilities and constants.

Formatting is performed using the thread-safe FastDateFormat class.

Note that the JDK has a bug wherein calling Calendar.get(int) will override any previously called Calendar.clear() calls. See LANG-755.

Since:

2.0

Version:

$Id: DateFormatUtils.java 1612038 2014-07-20 06:46:57Z ggregory $

Field Summary

Fields
Modifier and Type	Field and Description
`static FastDateFormat`	`ISO_DATE_FORMAT` ISO 8601 formatter for date without time zone.
`static FastDateFormat`	`ISO_DATE_TIME_ZONE_FORMAT` ISO 8601-like formatter for date with time zone.
`static FastDateFormat`	`ISO_DATETIME_FORMAT` ISO 8601 formatter for date-time without time zone.
`static FastDateFormat`	`ISO_DATETIME_TIME_ZONE_FORMAT` ISO 8601 formatter for date-time with time zone.
`static FastDateFormat`	`ISO_TIME_FORMAT` ISO 8601 formatter for time without time zone.
`static FastDateFormat`	`ISO_TIME_NO_T_FORMAT` ISO 8601-like formatter for time without time zone.
`static FastDateFormat`	`ISO_TIME_NO_T_TIME_ZONE_FORMAT` ISO 8601-like formatter for time with time zone.
`static FastDateFormat`	`ISO_TIME_TIME_ZONE_FORMAT` ISO 8601 formatter for time with time zone.
`static FastDateFormat`	`SMTP_DATETIME_FORMAT` SMTP (and probably other) date headers.

Constructor Summary

Constructors
Constructor and Description

DateFormatUtils()
DateFormatUtils instances should NOT be constructed in standard programming.

Constructors
Constructor and Description
`DateFormatUtils()` DateFormatUtils instances should NOT be constructed in standard programming.

Method Summary

Methods
Modifier and Type	Method and Description
`static String`	`format(Calendar calendar, String pattern)` Formats a calendar into a specific pattern.
`static String`	`format(Calendar calendar, String pattern, Locale locale)` Formats a calendar into a specific pattern in a locale.
`static String`	`format(Calendar calendar, String pattern, TimeZone timeZone)` Formats a calendar into a specific pattern in a time zone.
`static String`	`format(Calendar calendar, String pattern, TimeZone timeZone, Locale locale)` Formats a calendar into a specific pattern in a time zone and locale.
`static String`	`format(Date date, String pattern)` Formats a date/time into a specific pattern.
`static String`	`format(Date date, String pattern, Locale locale)` Formats a date/time into a specific pattern in a locale.
`static String`	`format(Date date, String pattern, TimeZone timeZone)` Formats a date/time into a specific pattern in a time zone.
`static String`	`format(Date date, String pattern, TimeZone timeZone, Locale locale)` Formats a date/time into a specific pattern in a time zone and locale.
`static String`	`format(long millis, String pattern)` Formats a date/time into a specific pattern.
`static String`	`format(long millis, String pattern, Locale locale)` Formats a date/time into a specific pattern in a locale.
`static String`	`format(long millis, String pattern, TimeZone timeZone)` Formats a date/time into a specific pattern in a time zone.
`static String`	`format(long millis, String pattern, TimeZone timeZone, Locale locale)` Formats a date/time into a specific pattern in a time zone and locale.
`static String`	`formatUTC(Date date, String pattern)` Formats a date/time into a specific pattern using the UTC time zone.
`static String`	`formatUTC(Date date, String pattern, Locale locale)` Formats a date/time into a specific pattern using the UTC time zone.
`static String`	`formatUTC(long millis, String pattern)` Formats a date/time into a specific pattern using the UTC time zone.
`static String`	`formatUTC(long millis, String pattern, Locale locale)` Formats a date/time into a specific pattern using the UTC time zone.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - ISO_DATETIME_FORMAT
```
public static final FastDateFormat ISO_DATETIME_FORMAT
```
    ISO 8601 formatter for date-time without time zone. The format used is yyyy-MM-dd'T'HH:mm:ss.
  - ISO_DATETIME_TIME_ZONE_FORMAT
```
public static final FastDateFormat ISO_DATETIME_TIME_ZONE_FORMAT
```
    ISO 8601 formatter for date-time with time zone. The format used is yyyy-MM-dd'T'HH:mm:ssZZ.
  - ISO_DATE_FORMAT
```
public static final FastDateFormat ISO_DATE_FORMAT
```
    ISO 8601 formatter for date without time zone. The format used is yyyy-MM-dd.
  - ISO_DATE_TIME_ZONE_FORMAT
```
public static final FastDateFormat ISO_DATE_TIME_ZONE_FORMAT
```
    ISO 8601-like formatter for date with time zone. The format used is yyyy-MM-ddZZ. This pattern does not comply with the formal ISO 8601 specification as the standard does not allow a time zone without a time.
  - ISO_TIME_FORMAT
```
public static final FastDateFormat ISO_TIME_FORMAT
```
    ISO 8601 formatter for time without time zone. The format used is 'T'HH:mm:ss.
  - ISO_TIME_TIME_ZONE_FORMAT
```
public static final FastDateFormat ISO_TIME_TIME_ZONE_FORMAT
```
    ISO 8601 formatter for time with time zone. The format used is 'T'HH:mm:ssZZ.
  - ISO_TIME_NO_T_FORMAT
```
public static final FastDateFormat ISO_TIME_NO_T_FORMAT
```
    ISO 8601-like formatter for time without time zone. The format used is HH:mm:ss. This pattern does not comply with the formal ISO 8601 specification as the standard requires the 'T' prefix for times.
  - ISO_TIME_NO_T_TIME_ZONE_FORMAT
```
public static final FastDateFormat ISO_TIME_NO_T_TIME_ZONE_FORMAT
```
    ISO 8601-like formatter for time with time zone. The format used is HH:mm:ssZZ. This pattern does not comply with the formal ISO 8601 specification as the standard requires the 'T' prefix for times.
  - SMTP_DATETIME_FORMAT
```
public static final FastDateFormat SMTP_DATETIME_FORMAT
```
    SMTP (and probably other) date headers. The format used is EEE, dd MMM yyyy HH:mm:ss Z in US locale.
- Constructor Detail
  - DateFormatUtils
```
public DateFormatUtils()
```
    DateFormatUtils instances should NOT be constructed in standard programming.
    
    This constructor is public to permit tools that require a JavaBean instance to operate.
- Method Detail
  - formatUTC
```
public static String formatUTC(long millis,
               String pattern)
```
    Formats a date/time into a specific pattern using the UTC time zone.
    
    Parameters:
    millis - the date to format expressed in milliseconds
    pattern - the pattern to use to format the date, not null
    
    Returns:
    the formatted date
  - formatUTC
```
public static String formatUTC(Date date,
               String pattern)
```
    Formats a date/time into a specific pattern using the UTC time zone.
    
    Parameters:
    date - the date to format, not null
    pattern - the pattern to use to format the date, not null
    
    Returns:
    the formatted date
  - formatUTC
```
public static String formatUTC(long millis,
               String pattern,
               Locale locale)
```
    Formats a date/time into a specific pattern using the UTC time zone.
    
    Parameters:
    millis - the date to format expressed in milliseconds
    pattern - the pattern to use to format the date, not null
    locale - the locale to use, may be null
    
    Returns:
    the formatted date
  - formatUTC
```
public static String formatUTC(Date date,
               String pattern,
               Locale locale)
```
    Formats a date/time into a specific pattern using the UTC time zone.
    
    Parameters:
    date - the date to format, not null
    pattern - the pattern to use to format the date, not null
    locale - the locale to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(long millis,
            String pattern)
```
    Formats a date/time into a specific pattern.
    
    Parameters:
    millis - the date to format expressed in milliseconds
    pattern - the pattern to use to format the date, not null
    
    Returns:
    the formatted date
  - format
```
public static String format(Date date,
            String pattern)
```
    Formats a date/time into a specific pattern.
    
    Parameters:
    date - the date to format, not null
    pattern - the pattern to use to format the date, not null
    
    Returns:
    the formatted date
  - format
```
public static String format(Calendar calendar,
            String pattern)
```
    Formats a calendar into a specific pattern.
    
    Parameters:
    calendar - the calendar to format, not null
    pattern - the pattern to use to format the calendar, not null
    
    Returns:
    the formatted calendar
    Since:
    
    2.4
    
    See Also:
    FastDateFormat.format(Calendar)
  - format
```
public static String format(long millis,
            String pattern,
            TimeZone timeZone)
```
    Formats a date/time into a specific pattern in a time zone.
    
    Parameters:
    millis - the time expressed in milliseconds
    pattern - the pattern to use to format the date, not null
    timeZone - the time zone to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(Date date,
            String pattern,
            TimeZone timeZone)
```
    Formats a date/time into a specific pattern in a time zone.
    
    Parameters:
    date - the date to format, not null
    pattern - the pattern to use to format the date, not null
    timeZone - the time zone to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(Calendar calendar,
            String pattern,
            TimeZone timeZone)
```
    Formats a calendar into a specific pattern in a time zone.
    
    Parameters:
    calendar - the calendar to format, not null
    pattern - the pattern to use to format the calendar, not null
    timeZone - the time zone to use, may be null
    
    Returns:
    the formatted calendar
    Since:
    
    2.4
    
    See Also:
    FastDateFormat.format(Calendar)
  - format
```
public static String format(long millis,
            String pattern,
            Locale locale)
```
    Formats a date/time into a specific pattern in a locale.
    
    Parameters:
    millis - the date to format expressed in milliseconds
    pattern - the pattern to use to format the date, not null
    locale - the locale to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(Date date,
            String pattern,
            Locale locale)
```
    Formats a date/time into a specific pattern in a locale.
    
    Parameters:
    date - the date to format, not null
    pattern - the pattern to use to format the date, not null
    locale - the locale to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(Calendar calendar,
            String pattern,
            Locale locale)
```
    Formats a calendar into a specific pattern in a locale.
    
    Parameters:
    calendar - the calendar to format, not null
    pattern - the pattern to use to format the calendar, not null
    locale - the locale to use, may be null
    
    Returns:
    the formatted calendar
    Since:
    
    2.4
    
    See Also:
    FastDateFormat.format(Calendar)
  - format
```
public static String format(long millis,
            String pattern,
            TimeZone timeZone,
            Locale locale)
```
    Formats a date/time into a specific pattern in a time zone and locale.
    
    Parameters:
    millis - the date to format expressed in milliseconds
    pattern - the pattern to use to format the date, not null
    timeZone - the time zone to use, may be null
    locale - the locale to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(Date date,
            String pattern,
            TimeZone timeZone,
            Locale locale)
```
    Formats a date/time into a specific pattern in a time zone and locale.
    
    Parameters:
    date - the date to format, not null
    pattern - the pattern to use to format the date, not null, not null
    timeZone - the time zone to use, may be null
    locale - the locale to use, may be null
    
    Returns:
    the formatted date
  - format
```
public static String format(Calendar calendar,
            String pattern,
            TimeZone timeZone,
            Locale locale)
```
    Formats a calendar into a specific pattern in a time zone and locale.
    
    Parameters:
    calendar - the calendar to format, not null
    pattern - the pattern to use to format the calendar, not null
    timeZone - the time zone to use, may be null
    locale - the locale to use, may be null
    
    Returns:
    the formatted calendar
    Since:
    
    2.4
    
    See Also:
    FastDateFormat.format(Calendar)

Class DateFormatUtils

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ISO_DATETIME_FORMAT

ISO_DATETIME_TIME_ZONE_FORMAT

ISO_DATE_FORMAT

ISO_DATE_TIME_ZONE_FORMAT

ISO_TIME_FORMAT

ISO_TIME_TIME_ZONE_FORMAT

ISO_TIME_NO_T_FORMAT

ISO_TIME_NO_T_TIME_ZONE_FORMAT

SMTP_DATETIME_FORMAT

Constructor Detail

DateFormatUtils

Method Detail

formatUTC

formatUTC

formatUTC

formatUTC

format

format

format

format

format

format

format

format

format

format

format

format