Java -- Calendar时间工具类

小鱼儿 2024-03-02 10:55 77阅读 0赞

public class DateUtils {
        
    	/**
         * 获取每天的开始时间 2023-10-17 00:00:00.000
         * @return
         */
        public static long getDayStartTime() {
        
            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MILLISECOND, 0);
            long todayStart = calendar.getTimeInMillis();
            return todayStart;
    
        }
    
        /**
         * 获取每天的结束时间 2023-10-17 23:59:59.999
         * @return
         */
        public static long getDayEndTime() {
        
            Calendar dateEnd = Calendar.getInstance();
    //        dateEnd.setTime(date);
            dateEnd.set(Calendar.HOUR_OF_DAY, 23);
            dateEnd.set(Calendar.MINUTE, 59);
            dateEnd.set(Calendar.SECOND, 59);
            long todayEnd = dateEnd.getTimeInMillis();
            return todayEnd;
        }
    
        /**
         * 获取每小时的开始时间 10:00:00.000
         * @return
         */
        public static long getHourStartTime() {
        
            Calendar calendar = Calendar.getInstance();
    
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MILLISECOND, 000);
            long hourStart = calendar.getTimeInMillis();
            return hourStart;
    
        }
    
        /**
         * 获取每小时的结束时间 10:59:59.999
         *
         * @return
         */
        public static long getHourEndTime() {
        
            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.MINUTE, 59);
            calendar.set(Calendar.SECOND, 59);
            calendar.set(Calendar.MILLISECOND, 999);
            long hourEnd= calendar.getTimeInMillis();
            return hourEnd;
        }
    }