java获取时间整点工具代码

柔光的暖阳◎ 2021-12-10 01:57 822阅读 1赞

#  以下是获取向前，向后 或者当前时间的整点时间 #

/**
         * 获取当前时间小时整点时间
         *
         * @param 
         * @return
         */
        public static Date getCurrentHourTime() {
            return getHourTime(new Date(), 0, "=");
        }
    
        /**
         * 获取指定时间上n个小时整点时间
         *
         * @param date
         * @return
         */
        public static Date getLastHourTime(Date date, int n) {
            return getHourTime(date, n, "-");
        }
    
        /**
         * 获取指定时间下n个小时整点时间
         *
         * @param date
         * @return
         */
        public static Date getNextHourTime(Date date, int n) {
            return getHourTime(date, n, "+");
        }
    
        /**
         * 获取指定时间n个小时整点时间
         *
         * @param date
         * @return
         */
        public static Date getHourTime(Date date, int n, String direction) {
            Calendar ca = Calendar.getInstance();
            ca.setTime(date);
            ca.set(Calendar.MINUTE, 0);
            ca.set(Calendar.SECOND, 0);
            switch (direction) {
                case "+":
                    ca.set(Calendar.HOUR_OF_DAY, ca.get(Calendar.HOUR_OF_DAY) + n);
                    break;
                case "-":
                    ca.set(Calendar.HOUR_OF_DAY, ca.get(Calendar.HOUR_OF_DAY) - n);
                    break;
                case "=":
                    ca.set(Calendar.HOUR_OF_DAY, ca.get(Calendar.HOUR_OF_DAY));
                    break;
                default:
                    ca.set(Calendar.HOUR_OF_DAY, ca.get(Calendar.HOUR_OF_DAY));
            }
    
            date = ca.getTime();
            return date;
        }