Java Date Format convertDateToString(Date date)

Description

Converts an instance of java.util.Date into a String using the date format: yyyy-MM-ddTHH:mm:ss.SSSZ.

License

fedora commons license

Parameter

Parameter	Description
date	Instance of java.util.Date.

Return

ISO 8601 String representation (yyyy-MM-ddTHH:mm:ss.SSSZ) of the Date argument or null if the Date argument is null.

Declaration

public static String convertDateToString(Date date)

Method Source Code


//package com.java2s;
/* The contents of this file are subject to the license and copyright terms
 * detailed in the license directory at the root of the source tree (also
 * available online at http://fedora-commons.org/license/).
 *//*  www  . j av a 2s. c  o  m*/

import java.text.DateFormat;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class Main {
    private static final Date ONE_CE = new Date(-62135769600000L);

    /**
     * Converts an instance of java.util.Date into a String using the date
     * format: yyyy-MM-ddTHH:mm:ss.SSSZ.
     *
     * @param date
     *        Instance of java.util.Date.
     * @return ISO 8601 String representation (yyyy-MM-ddTHH:mm:ss.SSSZ) of the
     *         Date argument or null if the Date argument is null.
     */
    public static String convertDateToString(Date date) {
        return convertDateToString(date, true);
    }

    /**
     * Converts an instance of java.util.Date into an ISO 8601 String
     * representation. Uses the date format yyyy-MM-ddTHH:mm:ss.SSSZ or
     * yyyy-MM-ddTHH:mm:ssZ, depending on whether millisecond precision is
     * desired.
     *
     * @param date
     *        Instance of java.util.Date.
     * @param millis
     *        Whether or not the return value should include milliseconds.
     * @return ISO 8601 String representation of the Date argument or null if
     *         the Date argument is null.
     */
    public static String convertDateToString(Date date, boolean millis) {
        if (date == null) {
            return null;
        } else {
            DateFormat df;
            if (millis) {
                df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
            } else {
                df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
            }
            df.setTimeZone(TimeZone.getTimeZone("UTC"));

            if (date.before(ONE_CE)) {
                StringBuilder sb = new StringBuilder(df.format(date));
                sb.insert(0, "-");
                return sb.toString();
            } else {
                return df.format(date);
            }
        }
    }
}