js 时间处理函数
getNextMonth (date, months) { // 从当前日期延后months个月
let arr = date.split('-')
let year = arr[0], month = arr[1], day = arr[2]
let days = new Date(year, month, 0)
days = days.getDate() // 获取当前日期中的月的天数
let year2 = year, month2 = parseInt(month) + parseInt(months)
if (month2 > 12) {
year2 = parseInt(year2) + 1
month2 = month2 - 12
}
let day2 = day
let days2 = new Date(year2, month2, 0)
days2 = days2.getDate()
if (day2 > days2) {
day2 = days2
}
if (month2 < 10) {
month2 = '0' + month2
}
let t2 = year2 +'-'+ month2 +'-'+ day2
return t2
},
getNextMonth(date, months) { // 从当前日期延后months个月再减一天
// console.log("getNextMonth", date, months);
let arr = date.split("-");
let year = arr[0],
month = arr[1],
day = arr[2];
let days = new Date(year, month, 0);
days = days.getDate(); // 获取当前日期中的月的天数
let year2 = year,
month2 = parseInt(month) + parseInt(months);
if (month2 > 12 && parseInt(month2)%12!=0) {
year2 = parseInt(year2) + Math.floor(month2/12);
month2 = parseInt(month2)%12;
} else if (month2 > 12 && parseInt(month2)%12===0) {
year2 = parseInt(year2) + Math.floor(month2/12) - 1
month2 = 12
}
if (month2 < 10) {
month2 = "0" + month2;
}
let t2 let day2 = day; let days2 = new Date(year2, month2, 0); // 表示当前月的最后一天 days2 = days2.getDate(); if (day2 > days2) { day2 = days2; t2 = year2 + "-" + month2 + "-" + day2; } else { t2 = year2 + "-" + month2 + "-" + day2; t2 = this.getPreDate(t2); } return t2; },
getPreDate (date) { // 从当前日期前一天 let d = new Date(date) d = +d - 1000*60*60*24 d = new Date(d) return formatDate(d, 'yyyy-MM-dd') }, getNextDate (date) { // 从当前日期后一天 let d = new Date(date) d = +d + 1000*60*60*24 d = new Date(d) return formatDate(d, 'yyyy-MM-dd') }