Example usage for java.text DateFormat parse

Introduction

In this page you can find the example usage for java.text DateFormat parse.

Prototype

public abstract Date parse(String source, ParsePosition pos);

Source Link

Document

Parse a date/time string according to the given parse position.

Usage

From source file:org.opendatakit.briefcase.util.WebUtils.java

/**
 * Parse a string into a datetime value. Tries the common Http formats, the
 * iso8601 format (used by Javarosa), the default formatting from
 * Date.toString(), and a time-only format.
 * /*ww  w  .j a  v a 2 s  .  c  om*/
 * @param value
 * @return
 */
public static final Date parseDate(String value) {
    if (value == null || value.length() == 0)
        return null;

    String[] iso8601Pattern = new String[] { PATTERN_ISO8601 };

    String[] localizedParsePatterns = new String[] {
            // try the common HTTP date formats that have time zones
            PATTERN_RFC1123, PATTERN_RFC1036, PATTERN_DATE_TOSTRING };

    String[] localizedNoTzParsePatterns = new String[] {
            // ones without timezones... (will assume UTC)
            PATTERN_ASCTIME };

    String[] tzParsePatterns = new String[] { PATTERN_ISO8601, PATTERN_ISO8601_DATE, PATTERN_ISO8601_TIME };

    String[] noTzParsePatterns = new String[] {
            // ones without timezones... (will assume UTC)
            PATTERN_ISO8601_WITHOUT_ZONE, PATTERN_NO_DATE_TIME_ONLY,
            PATTERN_YYYY_MM_DD_DATE_ONLY_NO_TIME_DASH };

    Date d = null;
    // iso8601 parsing is sometimes off-by-one when JR does it...
    d = parseDateSubset(value, iso8601Pattern, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    // try to parse with the JavaRosa parsers
    d = DateUtils.parseDateTime(value);
    if (d != null)
        return d;
    d = DateUtils.parseDate(value);
    if (d != null)
        return d;
    d = DateUtils.parseTime(value);
    if (d != null)
        return d;
    // try localized and english text parsers (for Web headers and interactive filter spec.)
    d = parseDateSubset(value, localizedParsePatterns, Locale.ENGLISH, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, localizedParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, localizedNoTzParsePatterns, Locale.ENGLISH, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, localizedNoTzParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    // try other common patterns that might not quite match JavaRosa parsers
    d = parseDateSubset(value, tzParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, noTzParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    // try the locale- and timezone- specific parsers
    {
        DateFormat formatter = DateFormat.getDateTimeInstance();
        ParsePosition pos = new ParsePosition(0);
        d = formatter.parse(value, pos);
        if (d != null && pos.getIndex() == value.length()) {
            return d;
        }
    }
    {
        DateFormat formatter = DateFormat.getDateInstance();
        ParsePosition pos = new ParsePosition(0);
        d = formatter.parse(value, pos);
        if (d != null && pos.getIndex() == value.length()) {
            return d;
        }
    }
    {
        DateFormat formatter = DateFormat.getTimeInstance();
        ParsePosition pos = new ParsePosition(0);
        d = formatter.parse(value, pos);
        if (d != null && pos.getIndex() == value.length()) {
            return d;
        }
    }
    throw new IllegalArgumentException("Unable to parse the date: " + value);
}

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From source file:org.opendatakit.common.utils.WebUtils.java

/**
 * Parse a string into a datetime value. Tries the common Http formats, the
 * iso8601 format (used by Javarosa), the default formatting from
 * Date.toString(), and a time-only format.
 *
 * @param value//from   w w  w  .j  a  va2 s .  c  o  m
 * @return
 */
public static final Date parseDate(String value) {
    if (value == null || value.length() == 0)
        return null;

    String[] iso8601Pattern = new String[] { PATTERN_ISO8601 };

    String[] localizedParsePatterns = new String[] {
            // try the common HTTP date formats that have time zones
            PATTERN_RFC1123, PATTERN_RFC1036, PATTERN_DATE_TOSTRING };

    String[] localizedNoTzParsePatterns = new String[] {
            // ones without timezones... (will assume UTC)
            PATTERN_ASCTIME };

    String[] tzParsePatterns = new String[] { PATTERN_ISO8601, PATTERN_ISO8601_DATE, PATTERN_ISO8601_TIME };

    String[] noTzParsePatterns = new String[] {
            // ones without timezones... (will assume UTC)
            PATTERN_ISO8601_WITHOUT_ZONE, PATTERN_NO_DATE_TIME_ONLY, PATTERN_YYYY_MM_DD_DATE_ONLY_NO_TIME_DASH,
            PATTERN_GOOGLE_DOCS };

    Date d = null;
    // iso8601 parsing is sometimes off-by-one when JR does it...
    d = parseDateSubset(value, iso8601Pattern, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    // try to parse with the JavaRosa parsers
    d = DateUtils.parseDateTime(value);
    if (d != null)
        return d;
    d = DateUtils.parseDate(value);
    if (d != null)
        return d;
    d = DateUtils.parseTime(value);
    if (d != null)
        return d;
    // try localized and english text parsers (for Web headers and interactive
    // filter spec.)
    d = parseDateSubset(value, localizedParsePatterns, Locale.ENGLISH, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, localizedParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, localizedNoTzParsePatterns, Locale.ENGLISH, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, localizedNoTzParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    // try other common patterns that might not quite match JavaRosa parsers
    d = parseDateSubset(value, tzParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    d = parseDateSubset(value, noTzParsePatterns, null, TimeZone.getTimeZone("GMT"));
    if (d != null)
        return d;
    // try the locale- and timezone- specific parsers
    {
        DateFormat formatter = DateFormat.getDateTimeInstance();
        ParsePosition pos = new ParsePosition(0);
        d = formatter.parse(value, pos);
        if (d != null && pos.getIndex() == value.length()) {
            return d;
        }
    }
    {
        DateFormat formatter = DateFormat.getDateInstance();
        ParsePosition pos = new ParsePosition(0);
        d = formatter.parse(value, pos);
        if (d != null && pos.getIndex() == value.length()) {
            return d;
        }
    }
    {
        DateFormat formatter = DateFormat.getTimeInstance();
        ParsePosition pos = new ParsePosition(0);
        d = formatter.parse(value, pos);
        if (d != null && pos.getIndex() == value.length()) {
            return d;
        }
    }
    throw new IllegalArgumentException("Unable to parse the date: " + value);
}

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From source file:com.sun.socialsite.util.DateUtil.java

/**
 * Parse data as either 6-char or 8-char format.
 *///from  ww  w  .j av a 2  s .c o m
public static Date parseWeblogURLDateString(String dateString, TimeZone tz, Locale locale) {

    Date ret = new Date();
    DateFormat char8DateFormat = DateUtil.get8charDateFormat();
    DateFormat char6DateFormat = DateUtil.get6charDateFormat();

    if (dateString != null && dateString.length() == 8 && StringUtils.isNumeric(dateString)) {
        ParsePosition pos = new ParsePosition(0);
        ret = char8DateFormat.parse(dateString, pos);

        // make sure the requested date is not in the future
        Date today = null;
        Calendar todayCal = Calendar.getInstance();
        todayCal = Calendar.getInstance(tz, locale);
        todayCal.setTime(new Date());
        today = todayCal.getTime();
        if (ret.after(today)) {
            ret = today;
        }

    } else if (dateString != null && dateString.length() == 6 && StringUtils.isNumeric(dateString)) {
        ParsePosition pos = new ParsePosition(0);
        ret = char6DateFormat.parse(dateString, pos);

        // make sure the requested date is not in the future
        Calendar todayCal = Calendar.getInstance();
        todayCal = Calendar.getInstance(tz, locale);
        todayCal.setTime(new Date());
        Date today = todayCal.getTime();
        if (ret.after(today)) {
            ret = today;
        }
    }

    return ret;
}

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