/// <summary>
/// 添加关键字
/// </summary>
/// <param name="key"></param>
public void AddKey(string key)
{
if (string.IsNullOrEmpty(key))
{
return;
}
TrieFilter node = this;
foreach (var c in key)
{
TrieFilter subnode;
if (!node.m_values.TryGetValue(c, out subnode))
{
subnode = new TrieFilter(c);
node.m_values.Add(c, subnode);
}
node = subnode;
}
//最后的结点，表示单词结束，用‘\0’表示，指向一个空对象
node.m_values['\0'] = null;
}
static TrieFilter getIllegalWords()
{
object obj = myCache.Get("IllegalWords");
if (obj == null)
{
obj = CacheHelper.Instance.Get(CacheCatalog.GetOther("IllegalWords"));
TrieFilter tf = new TrieFilter();
if (obj != null)
{
foreach (string temp in (obj as List<string>))
{
tf.AddKey(temp);
}
myCache.Add("IllegalWords", tf, null, System.Web.Caching.Cache.NoAbsoluteExpiration, new TimeSpan(0, 10, 0), System.Web.Caching.CacheItemPriority.Normal, null);
return tf;
}
else
{
List<string> result = new List<string>();
using (System.IO.StreamReader sr = new System.IO.StreamReader(System.Web.HttpContext.Current.Server.MapPath("~/File/") + "tools/IllegalWords.txt", Encoding.UTF8))
{
string temp = string.Empty;
while (sr.Peek() > 0)
{
temp = sr.ReadLine().Trim();
if (!string.IsNullOrEmpty(temp))
{
result.Add(temp);
tf.AddKey(temp);
}
}
sr.Close();
}
CacheHelper.Instance.Set(CacheCatalog.GetOther("IllegalWords"), result);
myCache.Add("IllegalWords", tf, null, System.Web.Caching.Cache.NoAbsoluteExpiration, new TimeSpan(0, 10, 0), System.Web.Caching.CacheItemPriority.Normal, null);
return tf;
}
}
else
return (TrieFilter)obj;
}