Question

i want to check for a string that only contains alphanumerics and few special chars which are:

1) dash
2) space
3) dot

with size 3-255 characters only.

but my below expression doesnt seems to work..something is wrong with the size i think..

@Pattern(regexp = "^[-a-zA-Z\s\.]{3,255}+$"

i even tried this:

@Pattern(regexp = "^[-a-zA-Z\s\.]\w{2,256}+$"

but that raises issue to the size validation due to the \w char – because it will only accepts alphanumeric and not special chars i guess…

any idea??

Answer 1

dash is special key too. add backslash. And you don’t need + to the end.

^[\-a-zA-Z0-9\s\.]{3,255}$