在项目中,有时候一些信息不便完全显示,只需要显示部分信息。现在提供一些隐藏敏感信息的操作方法,主要为对信息的截取操作:
1.指定左右字符数量,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)) { throw new ArgumentNullException(info); } var sbText = new StringBuilder(); var hiddenCharCount = info.Length - left - right; if (hiddenCharCount > 0) { string prefix = info.Substring(0, left), suffix = info.Substring(info.Length - right); sbText.Append(prefix); for (var 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(); }
2.指定左右字符数量,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)) { throw new ArgumentNullException(info); } var sbText = new StringBuilder(); var 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(); }
3.“*”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)) { throw new ArgumentNullException(info); } if (sublen <= 1) { sublen = 3; } var 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; } if (basedOnLeft) { var prefix = subLength > 0 ? info.Substring(0, subLength) : info.Substring(0, 1); return prefix + "****"; } var suffixs = subLength > 0 ? info.Substring(info.Length - subLength) : info.Substring(info.Length - 1); return "****" + suffixs; }
4.隐藏右键详情
/// <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)) { throw new ArgumentNullException(email); } if (!System.Text.RegularExpressions.Regex.IsMatch(email, @"w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*")) return HideSensitiveInfo(email); var suffixLen = email.Length - email.LastIndexOf('@'); return HideSensitiveInfo(email, left, suffixLen, false); }
在一些信息的隐藏操作,可以采用js实现,也可以采用jquery插件完成操作,但是在前台进行这样的操作,存在一些风险,在后台完成对字符的信息截取,可以很好的对信息进行保护。