题解 | #密码强度等级#

//每个加分项都写成一个方法，这样更清晰明了一些
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            String str = sc.nextLine();
            System.out.println(GetPwdSecurityLevel(str));
        }
        sc.close();
    }

    public static String GetPwdSecurityLevel(String Password) {
        int sum = 0;
        sum += LengthAdd(Password);
        sum += LetterAdd(Password);
        sum += IntegerAdd(Password);
        sum += SymbolAdd(Password);
        sum += AwardAdd(Password);
        if (sum >= 90)
            return "VERY_SECURE";
        else if (sum >= 80)
            return "SECURE";
        else if (sum >= 70)
            return "VERY_STRONG";
        else if (sum >= 60)
            return "STRONG";
        else if (sum >= 50)
            return "AVERAGE";
        else if (sum >= 25)
            return "WEAK";
        return "VERY_WEAK";
    }

    public static int LengthAdd(String Password) {
        if (Password.length() <= 4)
            return 5;
        else if (Password.length() >= 5 && Password.length() <= 7)
            return 10;
        return 25;
    }

    public static int LetterAdd(String Password) {
        int UpperLetter = 0;
        int LowerLetter = 0;
        for (int i = 0; i < Password.length(); i++) {
            String ch = String.valueOf(Password.charAt(i));
            if (ch.matches("[A-Z]"))
                UpperLetter++;
            else if (ch.matches("[a-z]"))
                LowerLetter++;
        }
        if (UpperLetter != 0 && LowerLetter != 0)
            return 20;
        else if ((UpperLetter == 0 && LowerLetter != 0) || (UpperLetter != 0 &&
                 LowerLetter == 0))
            return 10;
        return 0;
    }

    public static int IntegerAdd(String Password) {
        int NumOfInteger = 0;
        for (int i = 0; i < Password.length(); i++) {
            if (Password.charAt(i) >= '0' && Password.charAt(i) <= '9')
                NumOfInteger++;
        }
        if (NumOfInteger == 0)
            return 0;
        else if (NumOfInteger == 1)
            return 10;
        return 20;
    }

    public static int SymbolAdd(String Password) {
        int NumOfSymbol = 0;
        for (int i = 0; i < Password.length(); i++) {
            String ch = String.valueOf(Password.charAt(i));
            if (!ch.matches("[a-zA-Z0-9]"))
                NumOfSymbol++;
        }
        if (NumOfSymbol == 0)
            return 0;
        else if (NumOfSymbol == 1)
            return 10;
        return 25;
    }

    public static int AwardAdd(String Password) {
        int LetterNum = Main.LetterAdd(Password);
        int IntegerNum = Main.IntegerAdd(Password);
        int SymbolNum = Main.SymbolAdd(Password);
        if (LetterNum != 0 && IntegerNum != 0 && SymbolNum == 0)
            return 2;
        else if (LetterNum == 10 && IntegerNum != 0 && SymbolNum != 0)
            return 3;
        else if (LetterNum == 20 && IntegerNum != 0 && SymbolNum != 0)
            return 5;
        return 0;
    }
}