com.my373.common.util.MyDateUtils.java Source code

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Here is the source code for com.my373.common.util.MyDateUtils.java

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/**
 * Copyright qq:1219331697
 * 
 * Licensed 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.
 */

package com.my373.common.util;

import java.text.ParseException;
import java.util.Calendar;
import java.util.Date;

import org.apache.commons.lang3.time.DateUtils;

/**
 * MyDateUtils  org.apache.commons.lang3.time.DateUtils ?
 * 
 * 
 * @author QQ:1219331697
 *
 */
public class MyDateUtils extends DateUtils {

    /**
     * String to Date,RuntimeException
     * 
     * @param str
     * @param parsePatterns
     * @return
     */
    public static Date parseDate(final String str, final String... parsePatterns) {
        Date date = null;
        try {
            date = DateUtils.parseDate(str, parsePatterns);
        } catch (ParseException e) {
            throw new RuntimeException("?");
        }
        return date;
    }

    /**
     * 2endDate - beginDate
     * 
     * @param endDate
     * @param beginDate
     * @return
     */
    public static int subDate(Date endDate, Date beginDate) {
        Calendar d1 = Calendar.getInstance();
        d1.setTime(endDate);
        d1 = setTimeToMidnight(d1);

        Calendar d2 = Calendar.getInstance();
        d2.setTime(beginDate);
        d2 = setTimeToMidnight(d2);

        // 1000 * 60 * 60 * 24 = 86400000,??
        return (int) ((d1.getTimeInMillis() - d2.getTimeInMillis()) / 86400000);
    }

    /**
     * 
     * 
     * @param calendar
     * @return
     */
    public static Calendar setTimeToMidnight(Calendar calendar) {
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        return calendar;
    }
}