JS时间处理脚本总结

Js代码 ---
* 获取本周、本季度、本月、上月的开端日期、停止日期
*/
var now = new Date(); //当前日期
var nowDayOfWeek = now.getDay(); //今天本周的第几天
var nowDay = now.getDate(); //当前日
var nowMonth = now.getMonth(); //当前月
var nowYear = now.getYear(); //当前年
nowYear += (nowYear < 2000) ? 1900 : 0; //
var lastMonthDate = new Date(); //上月日期
lastMonthDate.setDate(1);
lastMonthDate.setMonth(lastMonthDate.getMonth()-1);
var lastYear = lastMonthDate.getYear();
var lastMonth = lastMonthDate.getMonth();
//格局化日期：yyyy-MM-dd
function formatDate(date) {
var myyear = date.getFullYear();
var mymonth = date.getMonth()+1;
var myweekday = date.getDate();
if(mymonth < 10){
mymonth = "0" + mymonth;
}
if(myweekday < 10){
myweekday = "0" + myweekday;
}
return (myyear+"-"+mymonth + "-" + myweekday);
}
//获得某月的天数
function getMonthDays(myMonth){
var monthStartDate = new Date(nowYear, myMonth, 1);
var monthEndDate = new Date(nowYear, myMonth + 1, 1);
var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);
return days;
}
//获得本季度的开端月份
function getQuarterStartMonth(){
var quarterStartMonth = 0;
if(nowMonth<3){
quarterStartMonth = 0;
}
if(2<nowMonth && nowMonth<6){
quarterStartMonth = 3;
}
if(5<nowMonth && nowMonth<9){
quarterStartMonth = 6;
}
if(nowMonth>8){
quarterStartMonth = 9;
}
return quarterStartMonth;
}
//获得本周的开端日期
function getWeekStartDate() {
var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
return formatDate(weekStartDate);
}
//获得本周的停止日期
function getWeekEndDate() {
var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
return formatDate(weekEndDate);
}
//获得本月的开端日期
function getMonthStartDate(){
var monthStartDate = new Date(nowYear, nowMonth, 1);
return formatDate(monthStartDate);
}
//获得本月的停止日期
function getMonthEndDate(){
var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
return formatDate(monthEndDate);
}
//获得上月开端时候
function getLastMonthStartDate(){
var lastMonthStartDate = new Date(nowYear, lastMonth, 1);
return formatDate(lastMonthStartDate);
}
//获得上月停止时候
function getLastMonthEndDate(){
var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));
return formatDate(lastMonthEndDate);
}
//获得本季度的开端日期
function getQuarterStartDate(){
var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
return formatDate(quarterStartDate);
}
//或的本季度的停止日期
function getQuarterEndDate(){
var quarterEndMonth = getQuarterStartMonth() + 2;
var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
return formatDate(quarterStartDate);
}

/* ***********************************************************************************************************************
界面显示的需求 == 获取当前日    -- 周 --- 月
复制黏贴之后即可运行
[html]
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script language="javascript" type="text/javascript">
    var now = new Date(); //当前日期
    var nowDayOfWeek = now.getDay(); //今天本周的第几天
    var nowDay = now.getDate(); //当前日
    var nowMonth = now.getMonth(); //当前月
    var nowYear = now.getYear(); //当前年
    nowYear += (nowYear < 2000) ? 1900 : 0; //

    function getDate(){
        var myDate = new Date();
        alert(formatDate(myDate));
    }
    function getWeek(){
        var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
        var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
        alert(formatDate(weekStartDate) + " | " + formatDate(weekEndDate));
    }
    function getMonth(){
        var monthStartDate = new Date(nowYear, nowMonth, 1);
        var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
        alert( formatDate(monthStartDate) + " | " + formatDate(monthEndDate) );
    }

    function getMonthDays(myMonth){
        var monthStartDate = new Date(nowYear, myMonth, 1);
        var monthEndDate = new Date(nowYear, myMonth + 1, 1);
        var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);
        return days;
    }
    function formatDate(date) {
        var myyear = date.getFullYear();
        var mymonth = date.getMonth()+1;
        var myweekday = date.getDate();

        if(mymonth < 10){
            mymonth = "0" + mymonth;
        }
        if(myweekday < 10){
            myweekday = "0" + myweekday;
        }
        return (myyear+"-"+mymonth + "-" + myweekday);
    }
</script>
</head>

<body>
<input type="button" onclick="getDate()" value="getdate" />
<input type="button" onclick="getWeek()" value="getWeek" />
<input type="button" onclick="getMonth()" value="getMonth" />
</body>
</html>

摘自 Xwin1989的专栏

补充：web前端 , JavaScript ,