js中日期相关问题

自己一些总结

日期转换

日期转字符串

function convertDate2String(datetime){
    var year = datetime.getFullYear();
    var month = datetime.getMonth() + 1 < 10 ? "0" + (datetime.getMonth() + 1) : datetime.getMonth() + 1;
    var date = datetime.getDate() < 10 ? "0" + datetime.getDate() : datetime.getDate();
    var hour = datetime.getHours()< 10 ? "0" + datetime.getHours() : datetime.getHours();
    var minute = datetime.getMinutes()< 10 ? "0" + datetime.getMinutes() : datetime.getMinutes();
    var second = datetime.getSeconds()< 10 ? "0" + datetime.getSeconds() : datetime.getSeconds();
    return year + "-" + month + "-" + date+" "+hour+":"+minute;
}

字符串转日期

var oldEndTimeStr = '2017-06-03 11:50';
var oldEndTime = new Date(Date.parse(oldEndTimeStr.replace(/-/g, "/")));

日期增减

//根据日期字符串计算月份差 (日期格式为"yyyy-MM-dd",根据自己需要改格式和方法)
function getMonthNumber(date1,date2){
    date1 = date1.split("-");
    date2 = date2.split("-");
    var year1 =  date1[0];
    var year2 =  date2[0];
    var month1 = date1[1];
    var month2 = date2[1];
    var day1 = date1[2];
    var day2 = date2[2];

    var len=(year2-year1)*12+(month2-month1);
    if (day1 >= day2) {
        len = len - 1;
    }
    return len;
}