Unity中使用的一套敏感词过滤方式

当项目中的敏感词数量不是很多的时候，直接用数组来遍历过滤其实也可以，但是具体的数量有多大，这个肯定不好说，因此，对.txt中的敏感词合理组织后再进行过滤就显得非常有必要了。

如上图，左边是txt中配置的敏感词，右边是需要转换为的数据结构（C#中的Dictory来存储即可）

下面那句话是一个示例，即需要过滤敏感词的句子。

具体的实现代码:

 using System;
 using System.IO;
 using System.Collections;
 using UnityEngine;
 using Common;
 using System.Collections.Generic;
 using System.Text;

 public class FilterSensitiveWords
 {
     static string[] sensitiveWordsArray = null;
     static string fileName = "sensitivewords.u";
     static string ReplaceValue = "*";
     static Dictionary<char, IList<string>> keyDict;

     public static void Initialize()
     {
         string path = "txt/sensitivewords.u";
         string name = "sensitivewords";
         LoadHelp.LoadAssetBundle(path, name, ar =>
         {
             string content = ar.Bundle.LoadAsset<TextAsset>(name).text;
             if (!(content.Equals("") || content.Equals(null)))
             {
                 sensitiveWordsArray = content.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);

                 keyDict = new Dictionary<char, IList<string>>();
                 foreach (string s in sensitiveWordsArray)
                 {
                     if (string.IsNullOrEmpty(s))
                         continue;
                     if (keyDict.ContainsKey(s[]))
                         keyDict[s[]].Add(s.Trim(new char[] { '\r' }));
                     else
                         keyDict.Add(s[], new List<string> { s.Trim(new char[] { '\r' }) });
                 }
             }
         });
     }

     //判断一个字符串是否包含敏感词，包括含的话将其替换为*
     public static bool IsContainSensitiveWords(ref string text, out string SensitiveWords)
     {
         bool isFind = false;
         SensitiveWords = "";
         if (null == sensitiveWordsArray || string.IsNullOrEmpty(text))
             return isFind;

         int len = text.Length;
         StringBuilder sb = new StringBuilder(len);
         bool isOK = true;
         for (int i = ; i < len; i++)
         {
             if (keyDict.ContainsKey(text[i]))
             {
                 foreach (string s in keyDict[text[i]])
                 {
                     isOK = true;
                     int j = i;
                     foreach (char c in s)
                     {
                         if (j >= len || c != text[j++])
                         {
                             isOK = false;
                             break;
                         }
                     }
                     if (isOK)
                     {
                         SensitiveWords = s;
                         isFind = true;
                         i += s.Length - ;
                         sb.Append('*', s.Length);
                         break;
                     }

                 }
                 if (!isOK)
                     sb.Append(text[i]);
             }
             else
                 sb.Append(text[i]);
         }
         if (isFind)
             text = sb.ToString();

         return isFind;
     }
 }