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隐藏手机号、邮箱等敏感信息

隐藏手机号、邮箱等敏感信息

Intro

做项目的时候，页面上有一些敏感信息，需要用“*”隐藏一些比较重要的信息，于是打算写一个通用的方法。

Let's do it !

Method 1:指定左右字符数量

Method 1.1 中间的*的个数和实际长度有关

 1     /// <summary>
 2     /// 隐藏敏感信息
 3     /// </summary>
 4     /// <param name="info">信息实体</param>
 5     /// <param name="left">左边保留的字符数</param>
 6     /// <param name="right">右边保留的字符数</param>
 7     /// <param name="basedOnLeft">当长度异常时，是否显示左边 
 8     /// <code>true</code>显示左边，<code>false</code>显示右边
 9     /// </param>
10     /// <returns></returns>
11     public static string HideSensitiveInfo(string info, int left, int right, bool basedOnLeft=true)
12     {
13         if (String.IsNullOrEmpty(info))
14         {
15             return "";
16         }
17         StringBuilder sbText = new StringBuilder();
18         int hiddenCharCount = info.Length - left - right;
19         if (hiddenCharCount > 0)
20         {
21             string prefix = info.Substring(0, left), suffix = info.Substring(info.Length - right);
22             sbText.Append(prefix);
23             for (int i = 0; i < hiddenCharCount; i++)
24             {
25                 sbText.Append("*");
26             }
27             sbText.Append(suffix);
28         }
29         else
30         {
31             if (basedOnLeft)
32             {
33                 if (info.Length > left && left > 0)
34                 {
35                     sbText.Append(info.Substring(0, left) + "****");
36                 }
37                 else
38                 {
39                     sbText.Append(info.Substring(0, 1) + "****");
40                 }
41             }
42             else
43             {
44                 if (info.Length > right && right > 0)
45                 {
46                     sbText.Append("****" + info.Substring(info.Length - right));
47                 }
48                 else
49                 {
50                     sbText.Append("****" + info.Substring(info.Length - 1));
51                 }
52             }
53         }
54         return sbText.ToString();
55     }
 

Method 1.2 : 中间的*的个数固定

 1     /// <summary>
 2     /// 隐藏敏感信息
 3     /// </summary>
 4     /// <param name="info">信息实体</param>
 5     /// <param name="left">左边保留的字符数</param>
 6     /// <param name="right">右边保留的字符数</param>
 7     /// <param name="basedOnLeft">当长度异常时，是否显示左边 
 8     /// <code>true</code>显示左边，<code>false</code>显示右边
 9     /// <returns></returns>
10     public static string HideSensitiveInfo1(string info, int left, int right, bool basedOnLeft = true)
11     {
12         if (String.IsNullOrEmpty(info))
13         {
14             return "";
15         }
16         StringBuilder sbText = new StringBuilder();
17         int hiddenCharCount = info.Length - left - right;
18         if (hiddenCharCount > 0)
19         {
20             string prefix = info.Substring(0, left), suffix = info.Substring(info.Length - right);
21             sbText.Append(prefix);
22             sbText.Append("****");
23             sbText.Append(suffix);
24         }
25         else
26         {
27             if (basedOnLeft)
28             {
29                 if (info.Length > left && left >0)
30                 {
31                     sbText.Append(info.Substring(0, left) + "****");
32                 }
33                 else
34                 {
35                     sbText.Append(info.Substring(0, 1) + "****");
36                 }
37             }
38             else
39             {
40                 if (info.Length > right && right>0)
41                 {
42                     sbText.Append("****" + info.Substring(info.Length - right));
43                 }
44                 else
45                 {
46                     sbText.Append("****" + info.Substring(info.Length - 1));
47                 }
48             }
49         }
50         return sbText.ToString();
51     }

 

Method 2 : “*”数量一定，设置为4个，按信息总长度的比例来取，默认左右各取1/3

 1     /// <summary>
 2     /// 隐藏敏感信息
 3     /// </summary>
 4     /// <param name="info">信息</param>
 5     /// <param name="sublen">信息总长与左子串（或右子串）的比例</param>
 6     /// <param name="basedOnLeft">当长度异常时，是否显示左边，默认true，默认显示左边
 7     /// <code>true</code>显示左边，<code>false</code>显示右边
 8     /// <returns></returns>
 9     public static string HideSensitiveInfo(string info,int sublen = 3,bool basedOnLeft = true)
10     {
11         if (String.IsNullOrEmpty(info))
12         {
13             return "";
14         }
15         if (sublen<=1)
16         {
17             sublen = 3;
18         }
19         int subLength = info.Length / sublen;
20         if (subLength > 0 && info.Length > (subLength*2) )
21         {
22             string prefix = info.Substring(0, subLength), suffix = info.Substring(info.Length - subLength);
23             return prefix + "****" + suffix;
24         }
25         else
26         {
27             if (basedOnLeft)
28             {
29                 string prefix = subLength > 0 ? info.Substring(0, subLength) : info.Substring(0, 1);
30                 return prefix + "****";
31             }
32             else
33             {
34                 string suffix = subLength > 0 ? info.Substring(info.Length-subLength) : info.Substring(info.Length-1);
35                 return "****"+suffix;
36             }
37         }
38     }

扩展

手机号 1

 1     /// <summary>
 2     /// 隐藏手机号详情
 3     /// </summary>
 4     /// <param name="phone">手机号</param>
 5     /// <param name="left">左边保留字符数</param>
 6     /// <param name="right">右边保留字符数</param>
 7     /// <returns></returns>
 8     public static string HideTelDetails(string phone, int left = 3, int right = 4)
 9     {
10         return HideSensitiveInfo(phone, left, right);
11     }

 

测试结果如下：

 

手机号 2

 1     /// <summary>
 2     /// 隐藏手机号详情
 3     /// </summary>
 4     /// <param name="phone">手机号</param>
 5     /// <param name="left">左边保留字符数</param>
 6     /// <param name="right">右边保留字符数</param>
 7     /// <returns></returns>
 8     public static string HideTelDetails(string phone, int left = 3, int right = 4)
 9     {
10         return HideSensitiveInfo1(phone, left, right);
11     }

 

测试结果如下：

 

邮件地址

 1     /// <summary>
 2     /// 隐藏右键详情
 3     /// </summary>
 4     /// <param name="email">邮件地址</param>
 5     /// <param name="left">邮件头保留字符个数，默认值设置为3</param>
 6     /// <returns></returns>
 7     public static string HideEmailDetails(string email, int left = 3)
 8     {
 9         if (String.IsNullOrEmpty(email))
10         {
11             return "";
12         }
13         if (System.Text.RegularExpressions.Regex.IsMatch(email, @"\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"))//如果是邮件地址
14         {
15             int suffixLen =email.Length - email.LastIndexOf('@');
16             return HideSensitiveInfo(email, left, suffixLen,false);
17         }
18         else
19         {
20             return HideSensitiveInfo(email);
21         }
22     }

 

测试结果如下：

 

posted @ 2016-09-14 17:14  WeihanLi  阅读(2270)  评论(2)  编辑  收藏  举报