js处理时间

js处理时间

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js处理时间

/**
* 获取本周、本季度、本月、上月的开始日期、结束日期
*/
//当前日期
var now = new Date();
//今天本周的第几天
var nowDayOfWeek = now.getDay();
//当前日
var nowDay = now.getDate();
//当前月
var nowMonth = now.getMonth()+1;
//当前年 yyyy
var year=now.getFullYear();
//当前年 yy
var nowYear = now.getYear();
//手动+2000
nowYear += (nowYear < 2000) ? 1900 : 0;
//获取当前星期X(0-6,0代表星期天)
now.getDay();
 //获取当前时间(从1970.1.1开始的毫秒数)
now.getTime();
//获取当前小时数(0-23)
now.getHours();
//获取当前分钟数(0-59)
now.getMinutes();
//获取当前秒数(0-59)
now.getSeconds();
//获取当前毫秒数(0-999)
now.getMilliseconds();
//获取当前日期
now.toLocaleDateString();
//获取当前时间
now.toLocaleTimeString();
//获取日期与时间
now.toLocaleString( );

//获取上月日期1号
var lastMonthDate = new Date();
lastMonthDate.setDate(1);
lastMonthDate.setMonth(lastMonthDate.getMonth() - 1);
//上月年份
var lastYear = lastMonthDate.getYear();
//上月月份
var lastMonth = lastMonthDate.getMonth()+1;

/*格式化日期：yyyy-MM-dd*/
function formatDate(date) {
    var myyear = date.getFullYear();
    var mymonth = date.getMonth() + 1;
    var myweekday = date.getDate();
    if (mymonth < 10) {
        mymonth = "0" + mymonth;
    }
    if (myweekday < 10) {
        myweekday = "0" + myweekday;
    }
    return (myyear + "-" + mymonth + "-" + myweekday);
}

/*获得某月的天数*/
function getMonthDays(year,month) {
    return new Date(year,month-1, 0).getDate();
}

/*获得本季度的开始月份*/
function getQuarterStartMonth() {
    var quarterStartMonth = 0;
    var nowMonth = new Date().getMonth()+1;
    if (nowMonth < 3) {
        quarterStartMonth = 0;
    }
    if (2 < nowMonth && nowMonth < 6) {
        quarterStartMonth = 3;
    }
    if (5 < nowMonth && nowMonth < 9) {
        quarterStartMonth = 6;
    }
    if (nowMonth > 8) {
        quarterStartMonth = 9;
    }
    return quarterStartMonth;
}

/*获得本周的开始日期*/
function getWeekStartDate() {
    //当前日期
    let now = new Date();
    //今天本周的第几天
    let nowDayOfWeek = now.getDay();
    //当前日
    let nowDay = now.getDate();
    //当前月
    let nowMonth = now.getMonth();
    //当前年 yyyy
    let nowYear=now.getFullYear();
    let weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
    return formatDate(weekStartDate);
}

/*获得本周的结束日期*/
function getWeekEndDate() {
    //当前日期
    let now = new Date();
    //今天本周的第几天
    let nowDayOfWeek = now.getDay();
    //当前日
    let nowDay = now.getDate();
    //当前月
    let nowMonth = now.getMonth();
    //当前年 yyyy
    let nowYear=now.getFullYear();
    let weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
    return formatDate(weekEndDate);

}

/*获得本月的开始日期*/
function getMonthStartDate() {
    //当前日期
    let now = new Date();
    //当前月
    let nowMonth = now.getMonth();
    //当前年 yyyy
    let nowYear=now.getFullYear();
    let monthStartDate = new Date(nowYear, nowMonth, 1);
    return formatDate(monthStartDate);

}

//获得本月的结束日期
function getMonthEndDate() {
    //当前日期
    let now = new Date();
    //当前月
    let nowMonth = now.getMonth();
    //当前年 yyyy
    let nowYear=now.getFullYear();
    let monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowYear,nowMonth+1));
    return formatDate(monthEndDate);

}

//获得上月开始时间
function getLastMonthStartDate() {
    //当前日期
    let now = new Date();

    //当前年 yyyy
    let nowYear=now.getFullYear();
    //获取上月日期1号
    let lastMonthDate = new Date();
    lastMonthDate.setDate(1);
    lastMonthDate.setMonth(lastMonthDate.getMonth() - 1);
    //上月月份
    let lastMonth = lastMonthDate.getMonth();
    let lastMonthStartDate = new Date(nowYear, lastMonth, 1);
    return formatDate(lastMonthStartDate);

}

/*获得上月结束时间*/
function getLastMonthEndDate() {
//当前日期
    let now = new Date();

    //当前年 yyyy
    let nowYear=now.getFullYear();
    //获取上月日期1号
    let lastMonthDate = new Date();
    lastMonthDate.setDate(1);
    lastMonthDate.setMonth(lastMonthDate.getMonth() - 1);
    //上月月份
    let lastMonth = lastMonthDate.getMonth();
    let lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth+1));
    return formatDate(lastMonthEndDate);

}

//获得本季度的开始日期
function getQuarterStartDate() {
    var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
    return formatDate(quarterStartDate);

}

//或的本季度的结束日期
function getQuarterEndDate() {
    var quarterEndMonth = getQuarterStartMonth() + 2;
    var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
    return formatDate(quarterStartDate);
}

来自为知笔记(Wiz)