本文内容不是解决问题，而是记录一些常用跟时间有关的方法，代码用的是TS语言。

第一个：传入秒数，返回时分秒（字符串，格式00:00:00）

public static TimeSecondToHMS(seconds: number): string {
    // 时
    let hour: number = Math.floor(seconds / 60 / 60);
    // 剩余秒数
    let left_second: number = seconds - hour * 60 * 60;
    // 分
    let minute: number = Math.floor(left_second / 60);
    // 秒
    let second: number = left_second - minute * 60;
    // 时间串
    let str: string = "";
    if (hour < 10) {
        str += "0";
    }
    str += hour + ":";
    if (minute < 10) {
        str += "0";
    }
    str += minute + ":";
    if (second < 10) {
        str += "0";
    }
    str += second;
    return str;
};

第二个：传入秒数，返回分秒（字符串，格式00:00）

public static FormatTimeStr(seconds: number): string {
    let str: string = "";
    let minute: number = Math.floor(seconds / 60);
    let second: number = seconds - minute * 60;
    if (minute < 10) {
        str += "0";
    }
    str += minute + ":";
    if (second < 10) {
        str += "0";
    }
    str+= second;
    return str;
}

第三个：获得当前时间戳（秒级）

public static GetCurrentTimeStampSecond(): number {
    let time: number = Date.parse(new Date().toString());
    return Math.floor(time / 1000);
}

第四个：获得本周周一零点、周日二十四点的时间戳

public static GetMondayTimeStamp(): number {
    let currentTimeStamp: number = Tools.GetCurrentTimeStampSecond();
    let currentDate: Date = new Date(currentTimeStamp * 1000);
    let dayNum: number = (currentDate.getDay() == 0) ? 7: currentDate.getDay();
    return (currentTimeStamp - (dayNum - 1) * 24 * 60 * 60 - currentDate.getHours() * 60 * 60 - currentDate.getMinutes() * 60 - currentDate.getSeconds());
}
public static GetSundayTimeStamp(): number {
    return Tools.GetMondayTimeStamp() + 7 * 24 * 60 * 60 - 1;
}