【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);}}