Java Timestamp truncateTimestamp(Timestamp timestamp, String period)

Description

Truncate the specified field of a java.sql.Timestamp

License

Apache License

Parameter

Parameter	Description
Timestamp	timestamp
String	period

Return

Timestamp

Declaration

public static Timestamp truncateTimestamp(Timestamp timestamp,
        String period) 

Method Source Code

//package com.java2s;
/*//from   w ww.  jav a2s  . com
 // Licensed to DynamoBI Corporation (DynamoBI) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information
 // regarding copyright ownership.  DynamoBI 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.sql.Timestamp;
import java.util.Calendar;

public class Main {
    private static final String HOURLY = "HOURLY";
    private static final String DAILY = "DAILY";
    private static final String WEEKLY = "WEEKLY";
    private static final String MONTHLY = "MONTHLY";
    private static final String YEARLY = "YEARLY";
    private static final String SECOND = "SECOND";
    private static final String MINUTE = "MINUTE";
    private static final String MONTH = "MONTH";

    /**
     * Truncate the specified field of a java.sql.Timestamp
     *
     * @param Timestamp timestamp
     * @param String period
     * @return Timestamp
     */
    public static Timestamp truncateTimestamp(Timestamp timestamp,
            String period) {
        Timestamp ts = null;

        if (period != null) {
            Calendar cal = Calendar.getInstance();
            cal.setTimeInMillis(timestamp.getTime());

            if (period.equalsIgnoreCase(HOURLY)) {
                cal.set(Calendar.MILLISECOND, 0);
                cal.set(Calendar.SECOND, 0);
                cal.set(Calendar.MINUTE, 0);
            } else if (period.equalsIgnoreCase(DAILY)) {
                cal.set(Calendar.MILLISECOND, 0);
                cal.set(Calendar.SECOND, 0);
                cal.set(Calendar.MINUTE, 0);
                cal.set(Calendar.HOUR_OF_DAY, 0);
            } else if (period.equalsIgnoreCase(WEEKLY)) {
                cal.set(Calendar.MILLISECOND, 0);
                cal.set(Calendar.SECOND, 0);
                cal.set(Calendar.MINUTE, 0);
                cal.set(Calendar.HOUR_OF_DAY, 0);
                cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
            } else if (period.equalsIgnoreCase(MONTHLY)) {
                cal.set(Calendar.MILLISECOND, 0);
                cal.set(Calendar.SECOND, 0);
                cal.set(Calendar.MINUTE, 0);
                cal.set(Calendar.HOUR_OF_DAY, 0);
                cal.set(Calendar.DAY_OF_MONTH, 1);
            } else if (period.equalsIgnoreCase(YEARLY)) {
                cal.set(Calendar.MILLISECOND, 0);
                cal.set(Calendar.SECOND, 0);
                cal.set(Calendar.MINUTE, 0);
                cal.set(Calendar.HOUR_OF_DAY, 0);
                cal.set(Calendar.DAY_OF_MONTH, 1);
                cal.set(Calendar.MONTH, Calendar.JANUARY);
            }

            ts = new Timestamp(cal.getTimeInMillis());
        }

        return (ts != null) ? ts : timestamp;
    }
}

Related

1. timestampOf(final ZonedDateTime time)
2. timestampPlusDay(java.sql.Timestamp ts, int iDayPlus)
3. timestampPlusDay2DDMMYYYY(java.sql.Timestamp ts, int iDayPlus)
4. trunc(Timestamp dayTime, String trunc)
5. truncateFractionalSeconds(Timestamp timestamp)
6. truncNanos(Timestamp timestamp)
7. unformattedFromTimestamp(java.sql.Timestamp t)
8. utcToTimestamp(String utcTimestamp)
9. weekNumber(Timestamp stamp, TimeZone timeZone, Locale locale)