敏感詞庫下載
FilterHelper類

#region 非法關鍵字過濾 bate 1.1/// <summary>/// 非法關鍵詞過濾(自動忽略漢字數字字母間的其他字符)/// </summary>public class FilterHelper{public FilterHelper() { }public FilterHelper(string dictionaryPath){this.dictionaryPath = dictionaryPath;}private string dictionaryPath = string.Empty;/// <summary>/// 詞庫路徑/// </summary>public string DictionaryPath{get { return dictionaryPath; }set { dictionaryPath = value; }}/// <summary>/// 內存詞典/// </summary>private WordGroup[] MEMORYLEXICON = new WordGroup[(int)char.MaxValue];private string sourctText = string.Empty;/// <summary>/// 檢測源/// </summary>public string SourctText{get { return sourctText; }set { sourctText = value; }}/// <summary>/// 檢測源游標/// </summary>int cursor = 0;/// <summary>/// 匹配成功后偏移量/// </summary>int wordlenght = 0;/// <summary>/// 檢測詞游標/// </summary>int nextCursor = 0;private List<string> illegalWords = new List<string>();/// <summary>/// 檢測到的非法詞集/// </summary>public List<string> IllegalWords{get { return illegalWords; }}/// <summary>/// 判斷是否是中文/// </summary>/// <param name="character"></param>/// <returns></returns>private bool isCHS(char character){// 中文表意字符的范圍 4E00-9FA5int charVal = (int)character;return (charVal >= 0x4e00 && charVal <= 0x9fa5);}/// <summary>/// 判斷是否是數字/// </summary>/// <param name="character"></param>/// <returns></returns>private bool isNum(char character){int charVal = (int)character;return (charVal >= 48 && charVal <= 57);}/// <summary>/// 判斷是否是字母/// </summary>/// <param name="character"></param>/// <returns></returns>private bool isAlphabet(char character){int charVal = (int)character;return ((charVal >= 97 && charVal <= 122) || (charVal >= 65 && charVal <= 90));}/// <summary>/// 轉半角小寫的函數(DBC case)/// </summary>/// <param name="input">任意字符串</param>/// <returns>半角字符串</returns>///<remarks>///全角空格為12288，半角空格為32///其他字符半角(33-126)與全角(65281-65374)的對應關系是：均相差65248///</remarks>private string ToDBC(string input){char[] c = input.ToCharArray();for (int i = 0; i < c.Length; i++){if (c[i] == 12288){c[i] = (char)32;continue;}if (c[i] > 65280 && c[i] < 65375)c[i] = (char)(c[i] - 65248);}return new string(c).ToLower();}/// <summary>/// 加載內存詞庫/// </summary>private void LoadDictionary(){if (DictionaryPath != string.Empty){List<string> wordList = new List<string>();Array.Clear(MEMORYLEXICON, 0, MEMORYLEXICON.Length);string[] words = System.IO.File.ReadAllLines(DictionaryPath, System.Text.Encoding.Default);foreach (string word in words){string key = this.ToDBC(word);wordList.Add(key);// wordList.Add(Strings.StrConv(key, VbStrConv.SimplifiedChinese, 0)); //這個是將字符轉成簡體中文，需要引入Microsoft.VisualBasic，同時，有些系統不支持。}Comparison<string> cmp = delegate (string key1, string key2){return key1.CompareTo(key2);};wordList.Sort(cmp);for (int i = wordList.Count - 1; i > 0; i--){if (wordList[i].ToString() == wordList[i - 1].ToString()){wordList.RemoveAt(i);}}foreach (var word in wordList){if (word.Length > 0){WordGroup group = MEMORYLEXICON[(int)word[0]];if (group == null){group = new WordGroup();MEMORYLEXICON[(int)word[0]] = group;}group.Add(word.Substring(1));}}}}/// <summary>/// 檢測/// </summary>/// <param name="blackWord"></param>/// <returns></returns>private bool Check(string blackWord){wordlenght = 0;//檢測源下一位游標nextCursor = cursor + 1;bool found = false;//遍歷詞的每一位做匹配for (int i = 0; i < blackWord.Length; i++){//特殊字符偏移游標int offset = 0;if (nextCursor >= sourctText.Length){break;}else{//檢測下位字符如果不是漢字 數字 字符 偏移量加1for (int y = nextCursor; y < sourctText.Length; y++){if (!isCHS(sourctText[y]) && !isNum(sourctText[y]) && !isAlphabet(sourctText[y])){offset++;//避讓特殊字符，下位游標如果>=字符串長度 跳出if (nextCursor + offset >= sourctText.Length) break;wordlenght++;}else break;}if ((int)blackWord[i] == (int)sourctText[nextCursor + offset]){found = true;}else{found = false;break;}}nextCursor = nextCursor + 1 + offset;wordlenght++;}return found;}/// <summary>/// 查找并替換/// </summary>/// <param name="replaceChar"></param>public string Filter(char replaceChar){LoadDictionary();if (sourctText != string.Empty){char[] tempString = sourctText.ToCharArray();for (int i = 0; i < SourctText.Length; i++){//查詢以該字為首字符的詞組WordGroup group = MEMORYLEXICON[(int)ToDBC(SourctText)[i]];if (group != null){for (int z = 0; z < group.Count(); z++){string word = group.GetWord(z);if (word.Length == 0 || Check(word)){string blackword = string.Empty;for (int pos = 0; pos < wordlenght + 1; pos++){blackword += tempString[pos + cursor].ToString();tempString[pos + cursor] = replaceChar;}illegalWords.Add(blackword);cursor = cursor + wordlenght;i = i + wordlenght;}}}cursor++;}return new string(tempString);}else{return string.Empty;}}}/// <summary>/// 具有相同首字符的詞組集合/// </summary>class WordGroup{/// <summary>/// 集合/// </summary>private List<string> groupList;public WordGroup(){groupList = new List<string>();}/// <summary>/// 添加詞/// </summary>/// <param name="word"></param>public void Add(string word){groupList.Add(word);}/// <summary>/// 獲取總數/// </summary>/// <returns></returns>public int Count(){return groupList.Count;}/// <summary>/// 根據下標獲取詞/// </summary>/// <param name="index"></param>/// <returns></returns>public string GetWord(int index){return groupList[index];}}#endregion

調用

//該代碼為Net Core下的控制臺demostring path = Directory.GetCurrentDirectory().Replace("\\bin\\Debug\\netcoreapp3.1","");FilterHelper filter = new FilterHelper(path+"/暴恐詞庫.txt"); //存放敏感詞的文檔filter.SourctText = "你個大推背";string resultStr = filter.Filter('*'); //用*號代替敏感詞var list=filter.IllegalWords; //這個可以獲取所有敏感詞集合foreach(string s in list){Console.WriteLine(s);}Console.WriteLine(resultStr);

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