Java正则表达式用破折号替换特殊字符和空格

Question

I have the following string,

String model = "Town & Country";

I'd like to replace the special characters and the spaces with a dash as well as lower case it for a nice clean url.

Example

"town-country"

I've tried the following code.

"Town & Country".replaceAll("[^A-Za-z0-9]", "-").toLowerCase();

but I ended up with the following output.

town---country

Could someone assist me with the regex so that this works properly? I if there is multiple spaces, I'd like to reduce it to a single space replaced by a dash. If there is a good java library out there designed to do this, I'd be interested in it, however I do not want to use pluses.

Answer 1

You're close, you just need to add a quantifier to the expression to allow it to match more than one character.

/[^A-Za-z0-9]+/

(Note the + at the end.)

So, your code should be this:

"Town & Country".replaceAll("[^A-Za-z0-9]+", "-").toLowerCase();

Live example on regexr