Java获取月初月末以及比较时间在某个区间

╰半夏微凉° 2022-04-18 04:57 731阅读 0赞

一.案例

package org.hyena.dorm.publics.util;
    
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    
    /**
     * @author 作者 hq.zheng:
     * @version 创建时间：2018-11-8 上午8:22:59
     * 时间工具类
     */
    public class DormDateTimeUtil {
    	 /**
         * 判断当前时间是否在[startTime, endTime]区间，注意时间格式要一致
         * 
         * @param nowTime 当前时间
         * @param startTime 开始时间
         * @param endTime 结束时间
         * @return
         * @author hq.zheng
         */
    	public static boolean isEffectiveDate(Date nowTime, Date startTime, Date endTime) {
            if (nowTime.getTime() == startTime.getTime()
                    || nowTime.getTime() == endTime.getTime()) {
                return true;
            }
    
            Calendar date = Calendar.getInstance();
            date.setTime(nowTime);
    
            Calendar begin = Calendar.getInstance();
            begin.setTime(startTime);
    
            Calendar end = Calendar.getInstance();
            end.setTime(endTime);
    
            if (date.after(begin) && date.before(end)) {
                return true;
            } else {
                return false;
            }
        }
    	 /**
         * 获取当前月的第一天
         * 
         * @return
         * @author hq.zheng
         */
    	public static Date getThisMonthFirstDay(){
    		Calendar cale = Calendar.getInstance();
    		cale.add(Calendar.MONTH, 0);
    		cale.set(Calendar.DAY_OF_MONTH, 1);
    		return cale.getTime();
    	}
    	 /**
         * 获取当前月的最后一天
         * 
         * @return
         * @author hq.zheng
         */
    	public static Date getThisMonthLastday(){
    		Calendar cale = Calendar.getInstance();
    		cale.add(Calendar.MONTH, 1);
            cale.set(Calendar.DAY_OF_MONTH, 0);
            return cale.getTime();
    	}
    	/**
         * 获取上月的第一天
         * 
         * @return
         * @author hq.zheng
         */
    	public static Date getPrecedMonthFirstDay(){
    		Calendar cale = Calendar.getInstance();
    		cale = Calendar.getInstance();
    	    cale.add(Calendar.MONTH, -1);
    	    cale.set(Calendar.DAY_OF_MONTH, 1);
    	    return cale.getTime();
    	}
    	/**
         * 获取上月的最后一天
         * 
         * @return
         * @author hq.zheng
         */
    	public static Date getPrecedMonthLastday(){
    		Calendar cale = Calendar.getInstance();
    		cale = Calendar.getInstance();
    		cale.add(Calendar.MONTH, 0);
    	    cale.set(Calendar.DAY_OF_MONTH, 0);
    	    return cale.getTime();
    	}
    	/**
         * 将字符串时间转成日期时间
         * 
         * @param nowDate 当前时间
         * @param format 转的格式，如[yyyy-MM-dd],[yyyy年MM月dd日 HH时mm分ss秒]
         * @return
         * @author hq.zheng
         */
    	public static Date formatStringToDate(String nowDate,String format){
    		SimpleDateFormat sdf = new SimpleDateFormat(format);
    		Date date=null;
    		try {
    			date=sdf.parse(nowDate);
    		} catch (Exception e) {
    			e.printStackTrace();
    			return date;
    		}
    		return date;
    	}
    }