Struts2的驗證+ +正則表達式

Question

我想寫一個正則表達式來驗證這種格式的輸入：

00:00 - > 24:00

它代表一天24小時的。

任何想法如何創建這樣一個正則表達式？

BR SC

Answer 1

我用這一個即簡單又很好的解釋，從www.mkyong.com網站

[01]?[0-9]|2[0-3]):[0-5][0-9]

(       #start of group #1 
[01]?[0-9]     # start with 0-9,1-9,00-09,10-19 
|       # or 
2[0-3]      # start with 20-23 
)       #end of group #1 
:       # follow by a semi colon (:) 
    [0-5][0-9]    # follow by 0..5 and 0..9, which means 00 to 59