如果密码是用MD5加密的，如何在服务器端验证java中的密码规则？

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class PasswordUtils {
    public static String encryptPassword(String password) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(password.getBytes());
        byte[] digest = md.digest();
        StringBuilder sb = new StringBuilder();
        for (byte b : digest) {
            sb.append(String.format("%02x", b & 0xff));
        }
        return sb.toString();
    }
}

import java.security.NoSuchAlgorithmException;

public class Server {
    public static void main(String[] args) {
        // 假设数据库中保存的密码
        String encryptedPasswordFromDatabase = "5f4dcc3b5aa765d61d8327deb882cf99";
        
        String userInputPassword = "password";
        try {
            String encryptedInputPassword = PasswordUtils.encryptPassword(userInputPassword);
            if (encryptedInputPassword.equals(encryptedPasswordFromDatabase)) {
                System.out.println("密码验证通过");
            } else {
                System.out.println("密码验证失败");
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
}