DateUtil.java

/*
 * Created by LuaView.
 * Copyright (c) 2017, Alibaba Group. All rights reserved.
 *
 * This source code is licensed under the MIT.
 * For the full copyright and license information,please view the LICENSE file in the root directory of this source tree.
 */

package com.taobao.luaview.util;

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

/**
 * Util for Handling Time or Date
 *
 * @author MonsterStorm
 * @version 1.0
 */
public class DateUtil {
    /**
     * default date time format "yyyy-MM-dd HH:mm:ss"
     */
    public static final String DATE_FORMAT_DEFAULT = "yyyy-MM-dd HH:mm:ss";
    /**
     * default Chinese date time format (in 24 hours format) "yyyy年MM月dd日 HH时mm分ss秒"
     */
    public static final String DATE_FORMAT_CN_24 = "yyyy年MM月dd日 HH时mm分ss秒";
    /**
     * default Chinese date time format (in 12 hours format) "yyyy年MM月dd日 hh时mm分ss秒"
     */
    public static final String DATE_FORMAT_CN_12 = "yyyy年MM月dd日 hh时mm分ss秒";
    /**
     * default Chinese date time format in short (and in 24 hours format ) "yy年MM月dd日 HH时mm分ss秒"
     */
    public static final String DATE_FORMAT_CN_24_SHORT = "yy年MM月dd日 HH时mm分ss秒";
    public static final String DATE_FORMAT_CN_24_SHORT_ENG = "yyMMddHHmmss";

    /**
     * default Chinese date time format in short (and in 12 hours format ) "yy年MM月dd日 hh时mm分ss秒"
     */
    public static final String DATE_FORMAT_CN_12_SHORT = "yy年MM月dd日 hh时mm分ss秒";
    /**
     * one second in milliseconds
     */
    public static final long ONE_SECOND = 1000;
    /**
     * one minute in milliseconds
     */
    public static final long ONE_MINUTE = 60 * ONE_SECOND;
    /**
     * one hour in milliseconds
     */
    public static final long ONE_HOUR = 60 * ONE_MINUTE;
    /**
     * one day in milliseconds
     */
    public static final long ONE_DAY = 24 * ONE_HOUR;

    /**
     * format a string, return default formatted string (yyyy-MM-dd HH:mm:ss)
     *
     * @param date
     * @return
     */
    public static String format(final Long date) {
        if (date != null) {
            return format(new Date(date), DATE_FORMAT_DEFAULT);
        } else {
            return getCurrent();
        }
    }

    /**
     * format a string, return default formatted string (yyyy-MM-dd HH:mm:ss)
     *
     * @param date
     * @return
     */
    public static String format(final Long date, final String format) {
        if (date != null) {
            return format(new Date(date), format);
        } else {
            return getCurrent(format);
        }
    }

    /**
     * format a string, return default formatted string (yyyy-MM-dd HH:mm:ss)
     *
     * @param date
     * @return
     */
    public static String format(final Date date) {
        if (date != null) {
            return format(date, DATE_FORMAT_DEFAULT);
        } else {
            return getCurrent();
        }
    }

    /**
     * 格式化时间串，返回给定格式的串
     *
     * @param date
     * @param format
     * @return
     */
    public static String format(final Date date, final String format) {
        if (date != null) {
            SimpleDateFormat sdf = new SimpleDateFormat(format);
            try {
                return sdf.format(date);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return date.toString();
        } else {
            return getCurrent(format);
        }
    }

    /**
     * build date time string according given date and default format
     *
     * @param date
     * @return
     */
    public static Date parse(final String date) {
        return parse(date, DATE_FORMAT_DEFAULT);
    }

    /**
     * build date time according given date and format
     *
     * @param date
     * @param format
     * @return
     */
    public static Date parse(final String date, final String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        try {
            return sdf.parse(date);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * get current date in default format
     *
     * @return
     */
    public static String getCurrent() {
        return getCurrent(DATE_FORMAT_DEFAULT);
    }

    /**
     * get current date in given format
     *
     * @return
     */
    public static String getCurrent(final String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        return sdf.format(new Date());
    }

    /**
     * get current date in milliseconds
     *
     * @return
     */
    public static Long getCurrentTime() {
        return System.currentTimeMillis();
    }
}