com.alibaba.utils.date.CommonDateUtils.java Source code

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Here is the source code for com.alibaba.utils.date.CommonDateUtils.java

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/*
 * Copyright 2013 Alibaba.com All right reserved. This software is the
 * confidential and proprietary information of Alibaba.com ("Confidential
 * Information"). You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license agreement you entered
 * into with Alibaba.com.
 */
package com.alibaba.utils.date;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

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

/**
 * <pre>
 * CommonDateUtils.java 
 * :
 * 1.SimpleDateFormatDateFormat
 * </pre>
 * @author yangbolin Sep 20, 2013 10:48:59 AM
 */
public class CommonDateUtils {
    /**
     * <pre>
     * 
     * :
     * 2013.09.202
     * 2013.09.18, 2013.09.19, 2013.09.20
     * </pre>
     * @param currentDate
     * @param days
     * @return
     */
    public static List<Date> beforeCurrentDate(Date currentDate, int days) {
        List<Date> dateList = new ArrayList<Date>();

        // 0. 
        if (currentDate == null) {
            return null;
        }
        if (days <= 0) {
            dateList.add(DateUtils.truncate(currentDate, Calendar.DAY_OF_MONTH));
            return dateList;
        }

        // 1. 
        Date startDate = DateUtils.addDays(currentDate, 0 - days);
        for (int i = 0; i < days; ++i) {
            Date date = DateUtils.addDays(startDate, i);
            // 
            dateList.add(DateUtils.truncate(date, Calendar.DAY_OF_MONTH));
        }
        // 2. 
        dateList.add(DateUtils.truncate(currentDate, Calendar.DAY_OF_MONTH));

        return dateList;
    }

    /**
     * <pre>
     * 
     * 
     * 2013.09.20,2
     * 2013.09.20 2013.09.21 2013.09.22
     * </pre>
     * @param currentDate
     * @param days
     * @return
     */
    public static List<Date> afterCurrentDate(Date currentDate, int days) {
        List<Date> dateList = new ArrayList<Date>();
        // 0. 
        if (currentDate == null) {
            return null;
        }
        if (days <= 0) {
            dateList.add(DateUtils.truncate(currentDate, Calendar.DAY_OF_MONTH));
            return dateList;
        }

        // 1. 
        Date startDate = new Date(currentDate.getTime());
        for (int i = 0; i <= days; ++i) {
            Date date = DateUtils.addDays(startDate, i);
            dateList.add(DateUtils.truncate(date, Calendar.DAY_OF_MONTH));
        }

        return dateList;
    }
}