判断俩个区间定时器是否重叠

最新推荐文章于 2023-12-27 09:57:22 发布

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本文介绍了一种方法来判断两个具有特定周期性和时间范围的定时任务是否存在时间上的重叠。通过具体示例展示了如何利用Java编程语言实现这一功能。

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代码备份

定时器分开始时间和结束时间，而且可以设置按周一到周日的循环，怎么判断俩个时间段有重复

    public void overlapTest() {
        ArrayList<String> timer = new ArrayList<>();
        // 下面时间段进行俩俩比较，测试是否有重叠
        // true
        timer.add("00 00 13-15 ? * 1,2,3,4,5,6,7");
        timer.add("00 00 14-16 ? * 1,7");

        // false
        timer.add("00 00 13-15 ? * 1,3,5");
        timer.add("00 00 14-16 ? * 2,4,6");

        // true
        timer.add("00 00 18-8 ? * 1,2,3");
        timer.add("00 00 7-9 ? * 4,5,6");

        // false
        timer.add("00 00 13-14 ? * 1,2,3");
        timer.add("00 00 13-14 ? * 4,5,6,7");

        // true
        timer.add("00 00 18-8 ? * 1");
        timer.add("00 00 7-9 ? * 2");

        // true
        timer.add("00 00 13-14 ? * 2");
        timer.add("00 00 13-14 ? * 1,2,3");


        for (int i = 0; i+1 < timer.size(); i+=2) {
            String[] cronData1 = timer.get(i).split(" ");
            String[] cronData2 = timer.get(i+1).split(" ");

            String week1[];
            Calendar startTime1 = Calendar.getInstance();
            Calendar endTime1 = Calendar.getInstance();
            String week2[];
            Calendar startTime2 = Calendar.getInstance();
            Calendar endTime2 = Calendar.getInstance();

            week1 = cronData1[5].split(",");
            startTime1.set(Calendar.HOUR_OF_DAY, Integer.parseInt(cronData1[2].split("-")[0]));
            endTime1.set(Calendar.HOUR_OF_DAY, Integer.parseInt(cronData1[2].split("-")[1]));
            startTime1.set(Calendar.MINUTE, 0);
            startTime1.set(Calendar.SECOND, 0);
            endTime1.set(Calendar.MINUTE, 0);
            endTime1.set(Calendar.SECOND, 0);

            week2 = cronData2[5].split(",");
            startTime2.set(Calendar.HOUR_OF_DAY, Integer.parseInt(cronData2[2].split("-")[0]));
            endTime2.set(Calendar.HOUR_OF_DAY, Integer.parseInt(cronData2[2].split("-")[1]));
            startTime2.set(Calendar.MINUTE, 0);
            startTime2.set(Calendar.SECOND, 0);
            endTime2.set(Calendar.MINUTE, 0);
            endTime2.set(Calendar.SECOND, 0);

            boolean ret1, ret2;
            ret1= isOverlap(week1, startTime1, endTime1, week2, startTime2, endTime2);
            ret2= isOverlap(week2, startTime2, endTime2, week1, startTime1, endTime1);
            Log.i("test", timer.get(i) + " VS " +timer.get(i+1) + " = " + ret1 + " " + ret2 );

        }
    }

    /**
     * 比较startTime1~endTime1  和 startTime2~endTime2俩个时间段是否重复
     * @param week1 是第一个定时器的周循环模式，1=周日，2=周一
     * @param startTime1 只使用里面的时分秒信息
     * @param endTime1 只使用里面的时分秒信息
     * @param week2
     * @param startTime2
     * @param endTime2
     * @return
     */
    public static boolean isOverlap(String week1[], Calendar startTime1, Calendar endTime1, String week2[], Calendar startTime2, Calendar endTime2) {
        /**
         * week1 是第一个定时器的周循环模式，1=周日，2=周一
         * startTime, endTime，只使用里面的时分秒信息
         */

        for(String w1 : week1) {
            for(String w2 : week2) {
                Calendar start1 = Calendar.getInstance();
                Calendar start2 = Calendar.getInstance();
                Calendar end1 = Calendar.getInstance();
                Calendar end2 = Calendar.getInstance();

                start1.set(Calendar.DAY_OF_WEEK, Integer.parseInt(w1));
                end1.set(Calendar.DAY_OF_WEEK, Integer.parseInt(w1));
                start2.set(Calendar.DAY_OF_WEEK, Integer.parseInt(w2));
                end2.set(Calendar.DAY_OF_WEEK, Integer.parseInt(w2));

                setTime(start1, startTime1);
                setTime(end1, endTime1);
                setTime(start2, startTime2);
                setTime(end2, endTime2);

                if(start1.after(end1)) { // 跨天的情况
                    end1.add(Calendar.DAY_OF_YEAR, 1);
                }

                if(start2.after(end2)) { // 跨天的情况
                    end2.add(Calendar.DAY_OF_YEAR, 1);
                }

                if((!start1.after(start2) && end1.after(start2)) || (!start1.before(start2) && end2.after(start1))) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 拷贝date的时分秒数据到calender变量
     * @param calendar
     * @param date
     */
    public static void setTime(Calendar calendar, Calendar date) {
        calendar.set(Calendar.HOUR_OF_DAY, date.get(Calendar.HOUR_OF_DAY));
        calendar.set(Calendar.MINUTE, date.get(Calendar.MINUTE));
        calendar.set(Calendar.SECOND, date.get(Calendar.SECOND));
    }