Use alpha numeric with with hyphen and underscore

Question

I've created the following regex which is not working to support the following. 1.accept alpha numreic with hyphen '-' and underscore only 2.can start only with alpha 3.can end with space

I try with the following and its not working. any idea?

"^[a-zA-Z0-9][\da-z-.]*[a-zA-Z0-9]*$"

Answer 1

根据您的条件，以下正则表达式是您想要的：

^[a-zA-Z][\\w-]*\\s*$