js 如何计算前一天，后一天

刺骨的言语ヽ痛彻心扉 2022-04-22 02:10 226阅读 0赞

<1>

`function getNowFormatDate() {`

`    ``var` `date = ``new` `Date();`

`    ``var` `seperator1 = ``"-"``;`

`    ``var` `seperator2 = ``":"``;`

`    ``var` `month = date.getMonth() + 1;`

`    ``var` `strDate = date.getDate();`

`    ``if` `(month >= 1 && month <= 9) {`

`        ``month = ``"0"` `+ month;`

`    ``}`

`    ``if` `(strDate >= 0 && strDate <= 9) {`

`        ``strDate = ``"0"` `+ strDate;`

`    ``}`

`    ``var` `currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate`

`            ``+ ``" "` `+ date.getHours() + seperator2 + date.getMinutes()`

`            ``+ seperator2 + date.getSeconds();`

`    ``return` `currentdate;`

`}`

### js获取当前时间前一天的时间和后一天 ###

`function` `GetDateStr(AddDayCount) { `

`    ``var` `dd = ``new` `Date(); `

`        ``dd.setDate(dd.getDate()+AddDayCount);``//获取AddDayCount天后的日期 `

`        ``var` `y = dd.getFullYear(); `

`        ``var` `m = dd.getMonth()+1;``//获取当前月份的日期 `

`        ``var` `d = dd.getDate(); `

`        ``return` `y+``"-"``+m+``"-"``+d; `

`} `

`document.write(``"前天："``+GetDateStr(-2)); `

`document.write(``"<br />昨天："``+GetDateStr(-1)); `

`document.write(``"<br />今天："``+GetDateStr(0)); `

`document.write(``"<br />明天："``+GetDateStr(1)); `

`document.write(``"<br />后天："``+GetDateStr(2)); `

`document.write(``"<br />大后天："``+GetDateStr(3));`

`<2>`

`//计算表头时间+1天 function getNextDay(d){         d = new Date(d);         d = +d + 1000*60*60*24;         d = new Date(d);         //格式化         return d.getFullYear()+"-"+(d.getMonth()+1)+"-"+d.getDate();     } //计算表头时间-1天 function getQianDay(d){         d = new Date(d);         d = +d - 1000*60*60*24;         d = new Date(d);         //格式化         return d.getFullYear()+"-"+(d.getMonth()+1)+"-"+d.getDate();     } --------------------- `  
<3>

### [js获取当前时间的前一天/后一天][js] ###

Date curDate = new Date();  
var preDate = new Date(curDate.getTime() - 24\*60\*60\*1000); //前一天  
var nextDate = new Date(curDate.getTime() + 24\*60\*60\*1000); //后一天

<4>

js获取当前时间的前一天/后一天

Date curDate = new Date();  
var preDate = new Date(curDate.getTime() - 24\*60\*60\*1000); //前一天  
var nextDate = new Date(curDate.getTime() + 24\*60\*60\*1000); //后一天

前一月/后一月  
var now = new Date();  
now.setMonth(now.getMonth()-1);   
 var now2 = new Date();  
now2.setMonth(now.getMonth()+1);    
alert(now2);  
\---------------------

[js]: https://www.cnblogs.com/yaomajor/p/7156555.html