com.baifendian.swordfish.common.utils.DateUtils.java Source code

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Here is the source code for com.baifendian.swordfish.common.utils.DateUtils.java

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/*
 * Copyright (C) 2017 Baifendian Corporation
 *
 * 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.baifendian.swordfish.common.utils;

import com.baifendian.swordfish.common.consts.Constants;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.FastDateFormat;

/**
 * ? <p>
 */
public class DateUtils {
    /**
     * ?
     */
    public static String getDefaultTimeZome() {
        return TimeZone.getDefault().getID();
    }

    /**
     * ???
     *
     * @return 
     */
    public static String now() {
        return now(Constants.BASE_DATETIME_FORMAT);
    }

    /**
     * ??? <p>
     *
     * @param format
     * @return 
     */
    public static String now(String format) {
        SimpleDateFormat dateFormat = new SimpleDateFormat(format);

        return dateFormat.format(new Date());
    }

    /**
     * ?? <p>
     *
     * @param date
     * @return 
     */
    public static String defaultFormat(Date date) {
        return format(date, Constants.BASE_DATETIME_FORMAT);
    }

    /**
     * ??
     *
     * @param date
     * @param formatString
     * @return
     */
    public static String format(Date date, String formatString) {
        if (date == null) {
            return StringUtils.EMPTY;
        }

        FastDateFormat format = FastDateFormat.getInstance(formatString);
        return format.format(date);
    }

    /**
     * ?
     *
     * @param dateStr
     * @param formatString
     * @return
     */
    public static Date parse(String dateStr, String formatString) {
        try {
            DateFormat formatter = new SimpleDateFormat(formatString);

            return formatter.parse(dateStr);
        } catch (ParseException e) {
            throw new RuntimeException("Time parse failed exception", e);
        }
    }

    /**
     * ?
     *
     * @param d1
     * @param d2
     * @return
     */
    public static long diffDays(Date d1, Date d2) {
        return (long) Math.ceil(diffHours(d1, d2) / 24.0);
    }

    /**
     * ??
     *
     * @param d1
     * @param d2
     * @return
     */
    public static long diffHours(Date d1, Date d2) {
        return (long) Math.ceil(diffMin(d1, d2) / 60.0);
    }

    /**
     * ?
     *
     * @param d1
     * @param d2
     * @return
     */
    public static long diffMin(Date d1, Date d2) {
        return (long) Math.ceil(diffSec(d1, d2) / 60.0);
    }

    /**
     * ?
     *
     * @param d1
     * @param d2
     * @return
     */
    public static long diffSec(Date d1, Date d2) {
        return (long) Math.ceil(diffMs(d1, d2) / 1000.0);
    }

    /**
     * ?
     *
     * @param d1
     * @param d2
     * @return
     */
    public static long diffMs(Date d1, Date d2) {
        return Math.abs(d1.getTime() - d2.getTime());
    }

    /**
     * ?
     *
     * @param future
     * @param old
     * @return
     */
    public static boolean compare(Date future, Date old) {
        return future.getTime() > old.getTime();
    }
}