【正则】包含大写小写字母数字的8到16位的密码正则

    public static void main(String[] args) {
        boolean flag = true;
        while (flag){
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入密码：");
            String s = sc.nextLine();
            System.out.println("s = " + s);

            //定义密码规则 包含大写小写字母数字的8到16位
            String regex = "(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])\S{8,16}$";

            //判断功能 匹配
            boolean isMatch = s.matches(regex);

            System.out.println("isMatch:" + isMatch);
            flag = !s.matches(regex);
        }

    }