com.aistor.common.utils.DateUtils.java Source code

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

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/**
 * Copyright &copy; 2012-2013 <a href="https://github.com/Dopas/dopas">Dopas</a> All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.aistor.common.utils;

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

import org.apache.commons.lang.time.DateFormatUtils;

/**
 * , org.apache.commons.lang.time.DateUtils
 * @author Zaric
 * @version 2013-3-15
 */
public class DateUtils extends org.apache.commons.lang.time.DateUtils {

    private static String[] parsePatterns = { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy/MM/dd",
            "yyyy/MM/dd HH:mm:ss" };

    /**
     * ? ?yyyy-MM-dd
     */
    public static String getDate() {
        return getDate("yyyy-MM-dd");
    }

    /**
     * ? ?yyyy-MM-dd pattern?"yyyy-MM-dd" "HH:mm:ss" "E"
     */
    public static String getDate(String pattern) {
        return DateFormatUtils.format(new Date(), pattern);
    }

    /**
     *  ?yyyy-MM-dd pattern?"yyyy-MM-dd" "HH:mm:ss" "E"
     */
    public static String formatDate(Date date, Object... pattern) {
        String formatDate = null;
        if (pattern != null && pattern.length > 0) {
            formatDate = DateFormatUtils.format(date, pattern[0].toString());
        } else {
            formatDate = DateFormatUtils.format(date, "yyyy-MM-dd");
        }
        return formatDate;
    }

    /**
     * ? ?HH:mm:ss
     */
    public static String getTime() {
        return formatDate(new Date(), "HH:mm:ss");
    }

    /**
     * ? ?yyyy-MM-dd HH:mm:ss
     */
    public static String getDateTime() {
        return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss");
    }

    /**
     * ? ?yyyy
     */
    public static String getYear() {
        return formatDate(new Date(), "yyyy");
    }

    /**
     * ? ?MM
     */
    public static String getMonth() {
        return formatDate(new Date(), "MM");
    }

    /**
     *  ?dd
     */
    public static String getDay() {
        return formatDate(new Date(), "dd");
    }

    /**
     * ? ?E
     */
    public static String getWeek() {
        return formatDate(new Date(), "E");
    }

    /**
     *  ?"yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss" 
     */
    public static Date parseDate(String str) {
        try {
            return parseDate(str, parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * ?
     * @param date
     * @return
     */
    public static long pastDays(Date date) {
        long t = new Date().getTime() - date.getTime();
        return t / (24 * 60 * 60 * 1000);
    }

    /**
     * @param args
     * @throws ParseException
     */
    public static void main(String[] args) throws ParseException {
        //      System.out.println(formatDate(parseDate("2010/3/6")));
        //      System.out.println(getDate("yyyyMMdd E"));
        //      long time = new Date().getTime()-parseDate("2012-11-19").getTime();
        //      System.out.println(time/(24*60*60*1000));
    }
}