获取当前日期以及三天后的日期

var date=new Date();//获取当前时间

var year=date.getFullYear();//获取当前年份

var month=date.getMonth()+1;//获取当前月

var day=date.getDate();//获取当前日

var nowTime=newday+'.'+month+'.'+day;//当前日期

console.log(nowTime);打印输出就是当前日期啦~

 

var runYear=[31,29,31,30,31,30,31,31,30,31,30,31];//获取闰年所有月份信息

var pingYear = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];//获取平年所有月份信息

var newday=day;//定义新日期变量

var newmonth=month;//定义新日期变量

var newyear=year;//定义新日期变量

const DAYS=3;//代表3天后，如果要求四天后，值可直接设为4，依次类推

if (year % 4 == 0 && year % 100 != 0){//判断平年闰年

console.log(runYear[month-1]);

if (runYear[month - 1] - newday >= DAYS){

newday = newday + DAYS

}

else if (runYear[month-1] - newday < 2&&newmonth!=12){

newmonth=newmonth+1;

newday = DAYS-(runYear[month-1] - newday)

}

else{

newyear=newyear+1;

newmonth=1;

newday = DAYS-(runYear[month-1] - newday)

}

}

else{

if (pingYear[month - 1] - newday >= DAYS) {

console.log(month);

console.log(pingYear[month]);

newday = newday + DAYS

}

else if (pingYear[month-1] - newday < 2 && newmonth != 12) {

newmonth = newmonth + 1;

newday = DAYS-(pingYear[month-1] - newday)

}

else {

newyear = newyear + 1;

newmonth = 1;

newday = DAYS-(pingYear[month-1] - newday)

}

}

 

var willTime=newyear+'.'+newmonth+'.'+newday;//后三天日期

console.log(willTime);//打印输出就是三天后的日期啦~