每兩週後重復發生一次Cron表達式

Question

我需要每隔一個星期一和星期三觸發我的郵件。我在我的應用程序中使用Java Spring。我已嘗試在週三使用此cron表達式00 15 11 ? * MONDAY#1和相同的內容，但它在本月的星期一和星期三觸發。我想要的是它應該在每個月的第一週，第三週和第五週的星期一和星期三觸發。

有人可以幫助我創建此cron表達式。

Answer 1

All type of cron exrpession you build from website [Cron Maker] 
I have one solution to meet with your requirement: 
Algorithm: 
1. Run cron every MON and WED day. 


    eg. 0 0 12 ? * MON,WED * 
     Start time Monday, September 7, 2015 6:10 AM Change 
     Next 5 scheduled dates 
     a. Monday, September 7, 2015 12:00 PM 
     b. Wednesday, September 9, 2015 12:00 PM 
     c. Monday, September 14, 2015 12:00 PM 
     d. Wednesday, September 16, 2015 12:00 PM 
     e. Monday, September 21, 2015 12:00 PM 

2. Now pro-grammatically control on odd week. for eg in java 


    Calendar c = Calendar.getInstance(); 
     if(c.get(Calendar.WEEK_OF_MONTH) % 2 != 0) { 
      //execute job 
     } else { 
      //not execute job just skip operation 
     } 

如果我能取得實際的cron的話，我將它張貼。

Answer 2

你想要的是

00 15 11 ? * MONDAY#1,MONDAY#3,MONDAY#5,WEDNESDAY#1,WEDNESDAY#3,WEDNESDAY#5" 

，但我不認爲這是去上班，因爲＃，只有一個表達式是允許的。所以，你必須有多個cron條目，如下所示。

00 15 11 ? * MONDAY#1 
00 15 11 ? * MONDAY#3 
00 15 11 ? * MONDAY#5 
00 15 11 ? * WEDNESDAY#1 
00 15 11 ? * WEDNESDAY#3 
00 15 11 ? * WEDNESDAY#5