正则表达式只允许字母和特殊字符，开头没有空格

Question

I have tried this: but this isn't working as expected. However it restricts user to enter space at the beginning. where did I made the mistake?

Regex that I have tried to build so far: [^-\\s][a-zA-Z\\s]*$

Should Match: priya, Abc Xyz
Should not match: <spaces>binayak , $&&ay%%aac

Answer 1

First of all, you missed the beginning of string anchor ^ .

Secondly, the inverse character class [^-\\s] is a good attempt at not allowing spaces, but at the same time it does allow other special characters to be at the beginning of the string, which we do not want. Instead, we could just something very similar to the second character class, just without the \\s : [a-zA-Z] .

Full regex:

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