Question

我正在使用ColdFusion 9.0.1。

我正在每个星期一午夜创建比赛。我需要使用ColdFusion（但我相信其他语言的逻辑是相同的）来查找最近一个星期一的日期。确定该日期后，我会将该日期删除到SQL语句中以获取当前的排名和过去的结果。

那么，我需要哪些功能才能找到最近的星期一？

ANSWER

Dates = structNew();
Dates.CurrentDay = dateFormat(now(), "yyyy-mm-dd");
// LOOP MAX OF SEVEN TIMES
for (i = 1; i lte 7; i++) {
    // IF CURRENT DAY OF WEEK IS MONDAY SET AND BREAK
    if (dayOfWeek(Dates.CurrentDay) == 2) {
        Dates.BikeOfTheWeekDate = Dates.CurrentDay;
        break; 
    // IF CURRENT DAY OF WEEK IS NOT MONDAY SUBTRACT DAY
    } else {
        Dates.CurrentDay = dateAdd("d", -1, Dates.CurrentDay);
    }
}

Answer 1

您也可以从2（即星期一）扣除当周的当天某天

<!--- All days except Sunday (ie 2-Monday,...,7-Saturday) --->
<cfif dayOfWeek(currentDate) gt 1>
    <cfset mostRecentMonday = dateAdd("d", 2-dayOfWeek(currentDate), currentDate)>
<cfelse>
    <cfset mostRecentMonday = dateAdd("d", -6, currentDate)>
</cfif>

Answer 2

伪代码：

Get the current day
Loop
    Check if it's Monday
        If yes, break out of the loop
    Substract one
Next loop

在ColdFusion中，使用DateAdd("d", -1, date)减去一天，并使用DayOfWeek(date)检查星期一，其中星期一返回2.

Answer 3

您也可以使用java Calendar类来完成它。

ColdFusion日期方法在内部使用的是什么。

<cfscript>
var cal = createObject( 'java', 'java.util.Calendar' ).getInstance();
cal.setTime( now() );

// if the (7) day of week is before (2) monday, we want the previous week
// decrement the (3) week of year
if ( cal.get(7) < 2 ) {
    cal.set( 3, cal.get(3) - 1 );
}

// set the (7) day of week back to (2) monday
cal.set( 7, 2 );    // 7 = day of week, 2 = monday

// reset time fields back to 0, aka midnight
cal.set( 11, 0 );   // 11 = hour of day
cal.set( 12, 0 );   // 12 = minute
cal.set( 13, 0 );   // 13 = second
cal.set( 14, 0 );   // 14 = millisecond

// get the last monday Date
var lastMonday = cal.getTime();

// cal.getTime() returns a java.util.Date
// if you want to convert the date to a ColdFusion OleDateTime, you can like so
var lastMonday = dateAdd( 'd', 0, cal.getTime() );

// or like this
var lastMonday = createObject( 'java', 'coldfusion.runtime.OleDateTime' ).init( cal.getTime() );
<cfscript>

http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Calendar.html

http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Date.html

如何找到最近的周一？

3 个答案: