获取近三月、近一月、近几天日期

获取近三月、近一月、近几天日期

function initData(){
    var endTime=getNowFormatDate();
    var beginTime=getPreMonth(endTime);//近1个月
    var beginThreeTime=getPreThMonth(endTime);//近3个月
    var beginSevenDayTime=get7DaysBefore(endTime);//近7天
    beginTime += " 00:00:00";
    beginThreeTime += " 00:00:00";
    beginSevenDayTime+= " 00:00:00";
    endTime += " 23:59:59";
}

获取近七天日期:date 格式为yyyy-mm-dd的日期，如：2014-01-25

function get7DaysBefore(date){
    var date = date || new Date(),
        timestamp, newDate;
    if(!(date instanceof Date)){
        date = new Date(date.replace(/-/g, '/'));
    }
    timestamp = date.getTime();
    newDate = new Date(timestamp - 7 * 24 * 3600 * 1000);
    return [[newDate.getFullYear(), newDate.getMonth() + 1, newDate.getDate()].join('-')];
}

获取上一个月：date 格式为yyyy-mm-dd的日期，如：2014-01-25

function getPreMonth(date) {
    var arr = [];
    var year = null; //获取当前日期的年份
    var month = null; //获取当前日期的月份
    var day = null; //获取当前日期的日
    if(typeof(date) == "string"){
        arr = date.split('-');
        year = arr[0]; //获取当前日期的年份
        month = arr[1]; //获取当前日期的月份
        day = arr[2]; //获取当前日期的日
    }else if(typeof(date) == "date"){
        year = nowDate.getFullYear(); //获取当前日期的年份
        month = nowDate.getMonth(); //获取当前日期的月份
        day = nowDate.getDate(); //获取当前日期的日
    }

    var days = new Date(year, month, 0);
    days = days.getDate(); //获取当前日期中月的天数
    var year2 = year;
    var month2 = parseInt(month) - 1;
    if (month2 == 0) {
        year2 = parseInt(year2) - 1;
        month2 = 12;
    }
    var day2 = day;
    var days2 = new Date(year2, month2, 0);
    days2 = days2.getDate();
    if (day2 > days2) {
        day2 = days2;
    }
    if (month2 < 10) {
        month2 = '0' + month2;
    }
    var t2 = year2 + '-' + month2 + '-' + day2;
    return t2;
}

近三月:@date 格式为yyyy-mm-dd的日期，如：2014-01-25

function getPreThMonth(date) {
    var arr = [];
    var year = null; //获取当前日期的年份
    var month = null; //获取当前日期的月份
    var day = null; //获取当前日期的日
    if(typeof(date) == "string"){
        arr = date.split('-');
        year = arr[0]; //获取当前日期的年份
        month = arr[1]; //获取当前日期的月份
        day = arr[2]; //获取当前日期的日
    }else if(typeof(date) == "date"){
        year = nowDate.getFullYear(); //获取当前日期的年份
        month = nowDate.getMonth(); //获取当前日期的月份
        day = nowDate.getDate(); //获取当前日期的日
    }

    var days = new Date(year, month, 0);
    days = days.getDate(); //获取当前日期中月的天数
    var year2 = year;
    var month2 = parseInt(month) - 3;
    if (month2 == 0) {
        year2 = parseInt(year2) - 1;
        month2 = 12;
    }
    var day2 = day;
    var days2 = new Date(year2, month2, 0);
    days2 = days2.getDate();
    if (day2 > days2) {
        day2 = days2;
    }
    if (month2 < 10) {
        month2 = '0' + month2;
    }
    var t2 = year2 + '-' + month2 + '-' + day2;
    return t2;
}

获取当前日期：

function getNowFormatDate() {
    var date = new Date();
    var seperator1 = "-";
    var seperator2 = ":";
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    var strDate = date.getDate();
    if (month >= 1 && month <= 9) {
        month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
        strDate = "0" + strDate;
    }
    var currentdate = year + seperator1 + month + seperator1 + strDate;
    return currentdate;
}