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

/// <summary> /// 隐藏敏感信息 /// </summary> /// <param name="info">信息实体</param> /// <param name="left">左边保留的字符数</param> /// <param name="right">右边保留的字符数</param> /// <param name="basedOnLeft">当长度异常时，是否显示左边 /// <code>true</code>显示左边，<code>false</code>显示右边 /// </param> /// <returns></returns> public static string HideSensitiveInfo(string info, int left, int right, bool basedOnLeft=true) { if (String.IsNullOrEmpty(info)) { return ""; } StringBuilder sbText = new StringBuilder(); int hiddenCharCount = info.Length - left - right; if (hiddenCharCount > 0) { string prefix = info.Substring(0, left), suffix = info.Substring(info.Length - right); sbText.Append(prefix); for (int i = 0; i < hiddenCharCount; i++) { sbText.Append("*"); } sbText.Append(suffix); } else { if (basedOnLeft) { if (info.Length > left && left > 0) { sbText.Append(info.Substring(0, left) + "****"); } else { sbText.Append(info.Substring(0, 1) + "****"); } } else { if (info.Length > right && right > 0) { sbText.Append("****" + info.Substring(info.Length - right)); } else { sbText.Append("****" + info.Substring(info.Length - 1)); } } } return sbText.ToString(); }

Method 1.2 : 中间的*的个数固定

/// <summary> /// 隐藏敏感信息 /// </summary> /// <param name="info">信息实体</param> /// <param name="left">左边保留的字符数</param> /// <param name="right">右边保留的字符数</param> /// <param name="basedOnLeft">当长度异常时，是否显示左边 /// <code>true</code>显示左边，<code>false</code>显示右边 /// <returns></returns> public static string HideSensitiveInfo1(string info, int left, int right, bool basedOnLeft = true) { if (String.IsNullOrEmpty(info)) { return ""; } StringBuilder sbText = new StringBuilder(); int hiddenCharCount = info.Length - left - right; if (hiddenCharCount > 0) { string prefix = info.Substring(0, left), suffix = info.Substring(info.Length - right); sbText.Append(prefix); sbText.Append("****"); sbText.Append(suffix); } else { if (basedOnLeft) { if (info.Length > left && left >0) { sbText.Append(info.Substring(0, left) + "****"); } else { sbText.Append(info.Substring(0, 1) + "****"); } } else { if (info.Length > right && right>0) { sbText.Append("****" + info.Substring(info.Length - right)); } else { sbText.Append("****" + info.Substring(info.Length - 1)); } } } return sbText.ToString(); }

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

/// <summary> /// 隐藏敏感信息 /// </summary> /// <param name="info">信息</param> /// <param name="sublen">信息总长与左子串（或右子串）的比例</param> /// <param name="basedOnLeft">当长度异常时，是否显示左边，默认true，默认显示左边 /// <code>true</code>显示左边，<code>false</code>显示右边 /// <returns></returns> public static string HideSensitiveInfo(string info,int sublen = 3,bool basedOnLeft = true) { if (String.IsNullOrEmpty(info)) { return ""; } if (sublen<=1) { sublen = 3; } int subLength = info.Length / sublen; if (subLength > 0 && info.Length > (subLength*2) ) { string prefix = info.Substring(0, subLength), suffix = info.Substring(info.Length - subLength); return prefix + "****" + suffix; } else { if (basedOnLeft) { string prefix = subLength > 0 ? info.Substring(0, subLength) : info.Substring(0, 1); return prefix + "****"; } else { string suffix = subLength > 0 ? info.Substring(info.Length-subLength) : info.Substring(info.Length-1); return "****"+suffix; } } }

扩展

手机号 1

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

测试结果如下：

手机号 2

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

测试结果如下：

邮件地址

/// <summary> /// 隐藏右键详情 /// </summary> /// <param name="email">邮件地址</param> /// <param name="left">邮件头保留字符个数，默认值设置为3</param> /// <returns></returns> public static string HideEmailDetails(string email, int left = 3) { if (String.IsNullOrEmpty(email)) { return ""; } if (System.Text.RegularExpressions.Regex.IsMatch(email, @"w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*"))//如果是邮件地址 { int suffixLen =email.Length - email.LastIndexOf('@'); return HideSensitiveInfo(email, left, suffixLen,false); } else { return HideSensitiveInfo(email); } }

测试结果如下：

以上所述是小编给大家介绍的C#隐藏手机号、邮箱等敏感信息的实现方法，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的，在此也非常感谢大家对查字典教程网的支持！