org.apache.commons.httpclient.util
Class DateUtil

java.lang.Object
  org.apache.commons.httpclient.util.DateUtil

public class DateUtil
extends Object

A utility class for parsing and formatting HTTP dates as used in cookies and other headers. This class handles dates as defined by RFC 2616 section 3.3.1 as well as some other common non-standard formats.

Author:

Christopher Brown, Michael Becke

Field Summary

static String	PATTERN_ASCTIME Date format pattern used to parse HTTP date headers in ANSI C asctime() format.
static String	PATTERN_RFC1036 Date format pattern used to parse HTTP date headers in RFC 1036 format.
static String	PATTERN_RFC1123 Date format pattern used to parse HTTP date headers in RFC 1123 format.

Method Summary

static String	formatDate(Date date) Formats the given date according to the RFC 1123 pattern.
static String	formatDate(Date date, String pattern) Formats the given date according to the specified pattern.
static Date	parseDate(String dateValue) Parses a date value.
static Date	parseDate(String dateValue, Collection dateFormats) Parses the date value using the given date formats.
static Date	parseDate(String dateValue, Collection dateFormats, Date startDate) Parses the date value using the given date formats.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PATTERN_RFC1123

public static final String PATTERN_RFC1123

Date format pattern used to parse HTTP date headers in RFC 1123 format.

See Also:

Constant Field Values

PATTERN_RFC1036

public static final String PATTERN_RFC1036

Date format pattern used to parse HTTP date headers in RFC 1036 format.

See Also:

Constant Field Values

PATTERN_ASCTIME

public static final String PATTERN_ASCTIME

Date format pattern used to parse HTTP date headers in ANSI C asctime() format.

See Also:

Constant Field Values

Method Detail

parseDate

public static Date parseDate(String dateValue)
                      throws DateParseException

Parses a date value. The formats used for parsing the date value are retrieved from the default http params.

Parameters:

dateValue - the date value to parse

Returns:

the parsed date

Throws:

DateParseException - if the value could not be parsed using any of the supported date formats

parseDate

public static Date parseDate(String dateValue,
                             Collection dateFormats)
                      throws DateParseException

Parses the date value using the given date formats.

Parameters:

dateValue - the date value to parse

dateFormats - the date formats to use

Returns:

the parsed date

Throws:

DateParseException - if none of the dataFormats could parse the dateValue

parseDate

public static Date parseDate(String dateValue,
                             Collection dateFormats,
                             Date startDate)
                      throws DateParseException

Parses the date value using the given date formats.

Parameters:

dateValue - the date value to parse

dateFormats - the date formats to use

startDate - During parsing, two digit years will be placed in the range startDate to startDate + 100 years. This value may be null. When null is given as a parameter, year 2000 will be used.

Returns:

the parsed date

Throws:

DateParseException - if none of the dataFormats could parse the dateValue

formatDate

public static String formatDate(Date date)

Formats the given date according to the RFC 1123 pattern.

Parameters:

date - The date to format.

Returns:

An RFC 1123 formatted date string.

See Also:

PATTERN_RFC1123

formatDate

public static String formatDate(Date date,
                                String pattern)

Formats the given date according to the specified pattern. The pattern must conform to that used by the simple date format class.

Parameters:

date - The date to format.

pattern - The pattern to use for formatting the date.

Returns:

A formatted date string.

Throws:

IllegalArgumentException - If the given date pattern is invalid.

See Also:

SimpleDateFormat