org.apache.commons.httpclient.util

Class DateUtil


public class DateUtil
extends java.lang.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.
Authors:
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.

Field Details

PATTERN_ASCTIME

public static final String PATTERN_ASCTIME
Date format pattern used to parse HTTP date headers in ANSI C asctime() format.

PATTERN_RFC1036

public static final String PATTERN_RFC1036
Date format pattern used to parse HTTP date headers in RFC 1036 format.

PATTERN_RFC1123

public static final String PATTERN_RFC1123
Date format pattern used to parse HTTP date headers in RFC 1123 format.

Method Details

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.

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.
See Also:
SimpleDateFormat

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

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