java正則校驗，必須包括字母數字字元

public static String checkPassword(String passwordStr) {
    if (passwordStr != null && !"".equals(passwordStr) && (passwordStr.length() < 6 || passwordStr.length() > 12)) {
        return "密碼為 6-12 位字母、數字或英文字元!";
    }

    // Z = 字母       S = 數字           T = 特殊字元
    String regexZ = "[A-Za-z]+";
    String regexS = "^\\d+$";
    String regexT = "[
 
[email protected]#$%^&*.]+";
    String regexZT = "[[email protected]#$%^&*.]+";
    String regexZS = "[0-9A-Za-z]+";
    String regexST = "[\\[email protected]#$%^&*.]*";
    String regexZST = "[\\[email protected]#$%^&*.]+";
 
    if (passwordStr.matches(regexZ)){
        return "純字母，弱";
    }
    if (passwordStr.matches(regexS)){
        return "純數字，弱";
    }
    if (passwordStr.matches(regexT)){
        return "純字元，弱";
    }
    if (passwordStr.matches(regexZT)){
        return "字母字元，中";
    }
    if (passwordStr.matches(regexZS)){
        return "字母數字，中";
    }
    if (passwordStr.matches(regexST)){
        return "數字字元，中";
    }
    if (passwordStr.matches(regexZST)) {
        return "強";
    }
    return "不知道是啥";
}
 

測試：

public static void main(String[] args)
{
    System.out.println(checkPassword("qqqqqq"));
    System.out.println(checkPassword("111111"));
    System.out.println(checkPassword("......"));
    
    System.out.println(checkPassword("qqq..."));
    System.out.println(checkPassword("111qqq"));
    System.out.println(checkPassword("111..."));
    
    System.out.println(checkPassword("11qq.."));
    System.out.println(checkPassword("11..qq"));
    System.out.println(checkPassword("qq..11"));
    System.out.println(checkPassword("qq11.."));
    System.out.println(checkPassword("..11qq"));
    System.out.println(checkPassword("..qq11"));
}
 

輸出：