Java Locale Format formatDate(Date date, String pattern)

Description

Formats the given date according to the specified pattern.

License

Apache License

Parameter

Parameter	Description
date	The date to format.
pattern	The pattern to use for formatting the date.

Exception

Parameter	Description
IllegalArgumentException	If the given date pattern is invalid.

Return

A formatted date string.

Declaration

public static String formatDate(Date date, String pattern) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.Locale;
import java.util.TimeZone;

public class Main {
    public static final TimeZone GMT = TimeZone.getTimeZone("GMT");

    public static String formatDate(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);//from   www .  j av a  2s .c  o  m
        return formatDate(cal);
    }

    /**
     *
     * @see #PATTERN_WEBDAV
     */
    public static String formatDate(Calendar cal) {
        // 2005-03-30T05:18:33Z
        StringBuilder sb = new StringBuilder();
        sb.append(cal.get(Calendar.YEAR) + "");
        sb.append('-');
        sb.append(pad2(cal.get(Calendar.MONTH) + 1));
        sb.append('-');
        sb.append(pad2(cal.get(Calendar.DAY_OF_MONTH)));
        //        sb.append('-');
        //        sb.append( pad2(cal.get(Calendar.DAY_OF_MONTH)) );
        //        sb.append('-');
        //        sb.append( pad2(cal.get(Calendar.MONTH)) );
        sb.append('T');
        sb.append(pad2(cal.get(Calendar.HOUR_OF_DAY)));
        sb.append(':');
        sb.append(pad2(cal.get(Calendar.MINUTE)));
        sb.append(':');
        sb.append(pad2(cal.get(Calendar.SECOND)));
        sb.append('Z');
        String s = sb.toString();
        //        log.debug(date.toString() + " -> " + s);
        return s;
    }

    /**
     * Formats the given date according to the specified pattern.  The pattern
     * must conform to that used by the {@link SimpleDateFormat simple date
     * format} class.
     *
     * @param date The date to format.
     * @param pattern The pattern to use for formatting the date.
     * @return A formatted date string.
     *
     * @throws IllegalArgumentException If the given date pattern is invalid.
     *
     * @see SimpleDateFormat
     */
    public static String formatDate(Date date, String pattern) {
        if (date == null)
            throw new IllegalArgumentException("date is null");
        if (pattern == null)
            throw new IllegalArgumentException("pattern is null");

        SimpleDateFormat formatter = new SimpleDateFormat(pattern, Locale.US);
        formatter.setTimeZone(GMT);
        return formatter.format(date);
    }

    public static String pad2(int i) {
        if (i < 10) {
            return "0" + i;
        } else {
            return i + "";
        }
    }
}

Related

1. formatDate(Calendar cal, String format)
2. formatDate(Date date, String format)
3. formatDate(Date date, String format)
4. formatDate(Date date, String format, String localeText)
5. formatDate(Date date, String pattern)
6. formatDate(Date date, String pattern, Locale locale)
7. formatDate(Date date, String pPatern)
8. formatDate(Date value, String pattern, TimeZone tz)
9. formatDate(final Date dat, final String pattern)