题解 | #密码强度等级#
密码强度等级
http://www.nowcoder.com/practice/52d382c2a7164767bca2064c1c9d5361
import java.util.Scanner;
import java.util.regex.Pattern;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
Main sol = new Main();
String rs = sol.pwdStrength(s);
System.out.println(rs);
}
public String pwdStrength (String s) {
// 分数
int fraction = 0;
// 密码长度
int s_length = s.length();
// 含有字母的个数
int letter_count = s.replaceAll("[^a-zA-Z]", "").length();
// 含有的数字个数
int number_count = s.replaceAll("[^0-9]", "").length();
// 含有的符号个数
int char_count = s.replaceAll("[0-9a-zA-Z]", "").length();
// 密码长度得分
if (s_length <= 4) {
fraction += 5;
}
else if (s_length <= 7) {
fraction += 10;
}
else if (s_length >= 8) {
fraction += 25;
}
// 是否含大小写字母
boolean upper_letter = Pattern.matches(".*[A-Z]+.*", s);
boolean lower_letter = s.matches(".*[a-z]+.*");
// 仅大/小写字母的个数
int upper_letter_count = s.replaceAll("[^A-Z]", "").length();
int lower_letter_count = s.replaceAll("[^a-z]", "").length();
// 含字母-得分
if (lower_letter && upper_letter) {
fraction += 20;
}
else if (upper_letter_count > 0) {
fraction += 10;
}
else if (lower_letter_count > 0) {
fraction += 10;
}
else if (letter_count == 0) {
fraction += 0;
}
// 数字-得分
if (number_count == 0) {
fraction += 0;
}
else if (number_count == 1) {
fraction += 10;
}
else if (number_count > 1) {
fraction += 20;
}
// 符号-得分
if (char_count == 0) {
fraction += 0;
}
else if (char_count == 1) {
fraction += 10;
}
else if (char_count > 1) {
fraction += 25;
}
// 奖励-得分
if (upper_letter &&
lower_letter &&
number_count > 0 &&
char_count > 0) {
fraction += 5;
}
else if (letter_count > 0 &&
number_count > 0 &&
char_count > 0) {
fraction += 3;
}
else if (letter_count > 0 &&
number_count > 0) {
fraction += 2;
}
if (fraction >= 90) {
return "VERY_SECURE";
}
else if (fraction >= 80) {
return "SECURE";
}
else if (fraction >= 70) {
return "VERY_STRONG";
}
else if (fraction >= 60) {
return "STRONG";
}
else if (fraction >= 50) {
return "AVERAGE";
}
else if (fraction >= 25) {
return "WEAK";
}
else if (fraction >= 0) {
return "VERY_WEAK";
}
return null;
}
}
