public static string Separate(ChineseDictionary dict,string text)
{
Delimiter="/";
bool isSeparated=false;
int separateLength=0;
StringBuilder sprText=new StringBuilder(text.Length+20);
DateTime start =DateTime.Now;
for(int i=0;i<text.Length;)
{
isSeparated=false;
if(text.Length-i<dict.WordMaxLength)
{
separateLength=text.Length-i;
}
else
{
separateLength=dict.WordMaxLength;
}
string spr=text.Substring(i,separateLength);
//如果是数字或者英文
if(Match.isNumberic(spr[0])||Match.isEnglish(spr[0]))
{
int index=1;
bool isNumber=false;
while(index<spr.Length&&Match.isNumberic(spr[index]))
{
index++;
isNumber=true;
}
while(!isNumber&&index<spr.Length&&Match.isEnglish(spr[index]))
{
index++;
}
i+=index;
sprText.Append(spr.Substring(0,index)+Delimiter);
continue;
}
else
{
while(spr.Length>1)
{
if(dict.Find(spr))
{
sprText.Append(spr+Delimiter);
isSeparated=true;
i+=spr.Length;
break;
}
else
{
spr=spr.Substring(0,spr.Length-1);
}
}
if(!isSeparated)
{
sprText.Append(spr[0]+Delimiter);
i++;
}
}
}
timespan=DateTime.Now-start;
return sprText.ToString();
}
private void btnOpenDict_Click(object sender, RoutedEventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "文本文件(*.txt)|*.txt";
if (ofd.ShowDialog()==true)
{
chinesedict = ChineseDictionary.InitializeFormFile(ofd.FileName);
FileStream fs = new FileStream(AppDomain.CurrentDomain.BaseDirectory+"Default.dict", FileMode.Create);
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(fs, chinesedict);
fs.Close();
}
}
void Window_Loaded(object sender, RoutedEventArgs e)
{
DateTime start=DateTime.Now;
if(File.Exists(@"Default.dict"))
{
using(FileStream fs = new FileStream(@"Default.dict", FileMode.Open))
{
BinaryFormatter formatter = new BinaryFormatter();
chinesedict = (ChineseDictionary)formatter.Deserialize(fs);//
}
}
TimeSpan ts=DateTime.Now-start;
tbTime.Text=ts.TotalMilliseconds.ToString();
}
public static ChineseDictionary InitializeFormFile(string filePath)
{
if(File.Exists(filePath)==false)
{
throw new Exception("File does not exist");
}
ChineseDictionary dict=new ChineseDictionary();
StreamReader stream=new StreamReader(filePath,System.Text.Encoding.UTF8);
while(!stream.EndOfStream)
{
dict.Add(stream.ReadLine());
}
stream.Close();
return dict;
}
/// <summary>
/// 对未分词文本进行分词并进行词频统计，获取词频字典
/// </summary>
/// <param name="text">待分词,统计的文本</param>
/// <param name="dict">分词依据词典</param>
/// <returns></returns>
public static Dictionary<string, int> GetWordFrequency(string text,ChineseDictionary dict)
{
string sprtext = SeparateWord.Separate(dict,text);
return GetWordFrequency(sprtext);
}
public static string Separate(ChineseDictionary dict,string text,string delimiter)
{
Delimiter=delimiter;
return Separate(dict,text);
}
