Java Today todayAsXSDDateString()

Description

today As XSD Date String

License

Apache License

Declaration

public static String todayAsXSDDateString() 

Method Source Code

//package com.java2s;
/*//from  ww  w.  j  a  va2s.c o  m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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

public class Main {
    public static String todayAsXSDDateString() {
        return calendarToXSDDateString(new GregorianCalendar());
    }

    public static String calendarToXSDDateString(Calendar cal) {
        return calendarToXSDString(cal, "yyyy-MM-dd");
    }

    private static String calendarToXSDString(Calendar cal, String fmt) {
        // c.f. Constructor on Jena's XSDDateTime
        // Only issue is that it looses the timezone through (Xerces)
        // normalizing to UTC.
        SimpleDateFormat dFmt = new SimpleDateFormat(fmt);
        Date date = cal.getTime();
        String lex = dFmt.format(date);
        lex = lex + calcTimezone(cal);
        return lex;
    }

    private static String calcTimezone(Calendar cal) {
        Date date = cal.getTime();
        TimeZone z = cal.getTimeZone();
        int tzOff = z.getRawOffset();
        int tz = tzOff;

        if (z.inDaylightTime(date)) {
            int tzDst = z.getDSTSavings();
            tz = tz + tzDst;
        }

        String sign = "+";
        if (tz < 0) {
            sign = "-";
            tz = -tz;
        }

        int tzH = tz / (60 * 60 * 1000); // Integer divide towards zero.
        int tzM = (tz - tzH * 60 * 60 * 1000) / (60 * 1000);

        String tzH_str = Integer.toString(tzH);
        String tzM_str = Integer.toString(tzM);

        if (tzH < 10)
            tzH_str = "0" + tzH_str;
        if (tzM < 10)
            tzM_str = "0" + tzM_str;
        return sign + tzH_str + ":" + tzM_str;
    }
}

Related

1. toDay(final String dateString)
2. today(String format)
3. today(String pattern)
4. today(String strFormat)
5. todayAsSimpleIsoDate(Date date)
6. todayAtDayEnd()
7. todayDate()
8. todayMinute()
9. todayPlusDays(int days)