日期转换

let pritime = "2018-04-07 14:38:16";

let minute = 1000 * 60;

    let hour = minute * 60;

    let day = hour * 24;

    let halfamonth = day * 15;

    let month = day * 30;

    if(dateTimeStamp == undefined){

        return false;

    }else{

        // 把日期中 - 换成 /

        dateTimeStamp = dateTimeStamp.replace(/\-/g, "/");  // 2018/04/07 14:38:16

        let sTime = new Date(dateTimeStamp).getTime();      // 1523083096000 把时间dateTimeStamp的值转为时间戳

        let now = new Date().getTime();                     // 1571728773333 获取当前时间的时间戳

        let diffValue = now - sTime;

        if(diffValue < 0){

            console.log("结束日期不能小于开始日期！");

        }

        let monthC = diffValue/month;

        let weekC = diffValue/(7*day);

        let dayC = diffValue/day;

        let hourC = diffValue/hour;

        let minC = diffValue/minute;

        

        if(monthC >= 1){

            console.log(parseInt(monthC) + "个月前");

        }else if(weekC >= 1){

            console.log(parseInt(weekC) + "周前")

        }else if(dayC >= 1){

            console.log(parseInt(dayC) +"天前")

        }else if(hourC >= 1){

            console.log(parseInt(hourC) +"个小时前")

        }else if(minC >= 1){

            console.log(parseInt(minC) +"分钟前")

        }else{

            console.log("刚刚")

        }  

    }