模糊匹配字符串中字母相似的数字？[关闭]

Question

0 vs O
1 vs l
6 vs b
...

Answer 1

我不确定这样的库是否存在，我也不确定我是否喜欢这些约束，但这里有一个选项可以做到这一点：

1. 为相似字符定义映射（您选择这些字符），例如

    Map<Character, Character> replacements = new HashMap<>();
    replacements.put('G', '6');
    replacements.put('b', '6');
    replacements.put('I', '1');
    replacements.put('l', '1');

   char[] replaceSimilarChars(char[] input) {
        char[] replaced = Arrays.copyOf(input, input.length);
        for( int i = 0; i < replaced.length; i++) {
            Character replacementChar = replacements.get(replaced[i]);
            if( replacementChar != null) {
                replaced[i] = replacementChar;
            }
        }
        
        return replaced;
    }

   public void savePassword(char[] password) { //for security reasons don't use String directly
     String hash = hash(replaceSimilarChars(password));
     ... //save the hash
   }

   public boolean checkPassword(String userId, char[] password) {
     String existingHash = loadPwHash(userId);  
     String passedHash = hash(replaceSimilarChars(password));   

     return existingHash.equals(passHash);
   }

当然，这要求您能够直接影响PW保存和匹配。根据您的评论，您只能控制匹配过程，所以如果您可以从DB获得密码（尽管这不安全），只需在加载后应用替换：

public boolean checkPassword(String userId, char[] password) {
  char[] savedPW = loadPw(userId);  
  return Arrays.equals(replaceSimilarChars(savePW),
                       replaceSimilarChars(password));
}