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創(chuàng)新互聯(lián)公司擁有十多年成都網(wǎng)站建設(shè)工作經(jīng)驗(yàn),為各大企業(yè)提供網(wǎng)站設(shè)計(jì)、成都做網(wǎng)站服務(wù)，對(duì)于網(wǎng)頁設(shè)計(jì)、PC網(wǎng)站建設(shè)（電腦版網(wǎng)站建設(shè)）、app軟件開發(fā)公司、wap網(wǎng)站建設(shè)（手機(jī)版網(wǎng)站建設(shè)）、程序開發(fā)、網(wǎng)站優(yōu)化（SEO優(yōu)化）、微網(wǎng)站、域名與空間等，憑借多年來在互聯(lián)網(wǎng)的打拼，我們?cè)诨ヂ?lián)網(wǎng)網(wǎng)站建設(shè)行業(yè)積累了很多網(wǎng)站制作、網(wǎng)站設(shè)計(jì)、網(wǎng)絡(luò)營銷經(jīng)驗(yàn)，集策劃、開發(fā)、設(shè)計(jì)、營銷、管理等網(wǎng)站化運(yùn)作于一體，具備承接各種規(guī)模類型的網(wǎng)站建設(shè)項(xiàng)目的能力。
TrieFilter類
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace SaaS.Web.Base
{
public class TrieNode
{
public bool m_end;
public Dictionary
public TrieNode()
{
m_values = new Dictionary
}
}
public class TrieFilter : TrieNode
{
///
/// 添加關(guān)鍵字
///
///
public void AddKey(string key)
{
if (string.IsNullOrEmpty(key))
{
return;
}
TrieNode node = this;
for (int i = 0; i < key.Length; i++)
{
char c = key[i];
TrieNode subnode;
if (!node.m_values.TryGetValue(c, out subnode))
{
subnode = new TrieNode();
node.m_values.Add(c, subnode);
}
node = subnode;
}
node.m_end = true;
}
///
/// 檢查是否包含非法字符
///
/// 輸入文本
///
public bool HasBadWord(string text)
{
for (int i = 0; i < text.Length; i++)
{
TrieNode node;
if (m_values.TryGetValue(text[i], out node))
{
for (int j = i + 1; j < text.Length; j++)
{
if (node.m_values.TryGetValue(text[j], out node))
{
if (node.m_end)
{
return true;
}
}
else
{
break;
}
}
}
}
return false;
}
///
/// 檢查是否包含非法字符
///
/// 輸入文本
///
public string FindOne(string text)
{
for (int i = 0; i < text.Length; i++)
{
char c = text[i];
TrieNode node;
if (m_values.TryGetValue(c, out node))
{
for (int j = i + 1; j < text.Length; j++)
{
if (node.m_values.TryGetValue(text[j], out node))
{
if (node.m_end)
{
return text.Substring(i, j + 1 - i);
}
}
else
{
break;
}
}
}
}
return string.Empty;
}
//查找所有非法字符
public IEnumerable
{
for (int i = 0; i < text.Length; i++)
{
TrieNode node;
if (m_values.TryGetValue(text[i], out node))
{
for (int j = i + 1; j < text.Length; j++)
{
if (node.m_values.TryGetValue(text[j], out node))
{
if (node.m_end)
{
yield return text.Substring(i, (j + 1 - i));
}
}
else
{
break;
}
}
}
}
}
///
/// 替換非法字符
///
///
/// 用于代替非法字符
///
public string Replace(string text, char c)
//public string Replace(string text, char c = '*')
{
char[] chars = null;
for (int i = 0; i < text.Length; i++)
{
TrieNode subnode;
if (m_values.TryGetValue(text[i], out subnode))
{
for (int j = i + 1; j < text.Length; j++)
{
if (subnode.m_values.TryGetValue(text[j], out subnode))
{
if (subnode.m_end)
{
if (chars == null) chars = text.ToArray();
for (int t = i; t <= j; t++)
{
chars[t] = c;
}
i = j;
}
}
else
{
break;
}
}
}
}
return chars == null ? text : new string(chars);
}
}
}
調(diào)用執(zhí)行方法類：
#region 過濾關(guān)鍵字
Stopwatch sw2 = new Stopwatch();
sw2.Start();
int time_cap = 2000;
string urlAddress = HttpContext.Server.MapPath("~/App_Data/KeyWord.txt");
TrieFilter tf = new TrieFilter();
using (StreamReader sw = new StreamReader(System.IO.File.OpenRead(urlAddress)))
{
string key = sw.ReadLine();
while (key != null)
{
if (key != string.Empty)
{
tf.AddKey(key);
}
key = sw.ReadLine();
}
}
if (!string.IsNullOrEmpty(content))
content = tf.Replace(content, '*');
#region 測試運(yùn)行時(shí)間
//System.Diagnostics.Stopwatch sw1 = new System.Diagnostics.Stopwatch();
//sw1.Start();
//System.Threading.Thread.Sleep(time_cap);
//sw1.Stop();
//TimeSpan ts2 = sw1.Elapsed;
//double t = ts2.TotalMilliseconds;//運(yùn)行時(shí)間
sw2.Stop();
TimeSpan ts3 = sw2.Elapsed;
double times = ts3.TotalMilliseconds;
Console.WriteLine("Stopwatch總共花費(fèi){0}ms.", ts3.TotalMilliseconds);
#endregion
#endregion
網(wǎng)站欄目：C#發(fā)送消息過濾關(guān)鍵字
文章來源：http://fisionsoft.com.cn/article/ieoshh.html
