Regular Expression to allow only 0-9 digits only (Not even '.' [Dot]) in JSP using javascript

Question

Could anyone please provide me with a regular expression to allow only digits (0-9) excluding even '.' (decimal point) in a textbox in JSP using javascript. I would be using it to replace the resricted characters with '' (empty string).

I tried few but they are not restricitng the DOT.

Thanks in advance

Answer 1

正则表达式模式为：

/^[0-9]+$/

Answer 2

You need to anchor the regex:

/^\d*$/

to make sure that the entire string consists of digits.

Without ^ and $ , the regex would match 1 (and 234 ) in 1.234 .

Answer 3

I would use the class \\d , it includes only digits. If you want to replace all non-digits you would need to replace \\D+ with "" .