Java,确保String只包含字母数字,空格和短划线

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class Main {
    public static void main(String[] args) {
        String input = "This-is a string 123";
        String regex = "^[a-zA-Z0-9\\s-]+$";

        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);

        if (matcher.matches()) {
            System.out.println("The input string only contains alphanumeric characters, spaces, and hyphens.");
        } else {
            System.out.println("The input string contains invalid characters.");
        }
    }
}