如何在javascript中获得最后一个小时,上个月和昨天



我正在尝试从当前日期和时间中获取最后一个小时,上个月和昨天,我使用date()对象来获取当前日期和时间:

function fetchCurrentDateTime() {
    var currentDateobj = new Date()
    var Day = currentDateobj.getDate()
    var Hour = currentDateobj.getHours()
    var Month = 1+(currentDateobj.getMonth())
    var Year = currentDateobj.getFullYear()
    console.log('Today is:', Day+'-'+Month+'-'+Year);
    console.log('yesterday was:', Day-1+'-'+Month+'-'+Year);
    console.log('Its', Hour, 'hrs');
    console.log('It was', Hour-1, 'an Hour back.');
    console.log('This is:', Month, 'Month');
    console.log('It was', Month-1, 'Month, a month ago.');
    console.log('It is', Year);
    }

我想要一个函数,它不仅返回日期或时间,而且返回完整的datetime,如:

Today: '2013-05-21 10:06:22'
Yesterday: '2013-05-20 10:06:22'
Current Hour: '2013-05-21 10:06:22'
Last Hour: '2013-05-21 09:06:22'
Current Month: '2013-05-21 10:06:22'
Last Month: '2013-04-21 10:06:22'

我还想问一下,如果小时是00:00:00,那么最后一个小时的结果是什么?月份和日期也是一样。

var today = new Date();
var yesterday = new Date(today.getTime() - (1000*60*60*24));
var hourago = new Date(today.getTime() - (1000*60*60));
    
console.log("Today:", today);
console.log("Yesterday:",yesterday);
console.log("Hours Ago:", hourago);

getTime()返回Date对象的时间戳。然后,您只需减去适当的毫秒数,并从该数字创建一个新对象。如果需要,您现在可以以您希望的方式格式化日期。

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