Lucene.Net最高版本为3.0.3,并且apache已经不再提供Lucene.Net的更新,没仔细研究过Lucene.Net的所有版本,Lucene.Net3.0.3遍历TokenStream获取Token对象,已经和以前的版本有了很大的区别,很多方法都已经删除了或者过时。
以前版本的Lucene.Net从TokenStream中获取Token时调用Next方法就行了,源代码如下
public void ReusableTokenStream2()
{
string testwords = "web开发网";
SimpleAnalyzer simple = new SimpleAnalyzer();
TokenStream ts = simple.ReusableTokenStream("", new StringReader(testwords));
Token token;
while ((token = ts.Next()) != null)
{
Console.WriteLine(token.TermText());
}
ts.Close();
}
但是在Lucene.Net3.0.3中TokenStream已经不存在Next方法,而是需要ITermAttribute属性接口来遍历。源代码如下
public void ReusableTokenStream3()
{
Lucene.Net.Analysis.Standard.StandardAnalyzer a = new Lucene.Net.Analysis.Standard.StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30);
string s = "web开发网";
System.IO.StringReader reader = new System.IO.StringReader(s);
Lucene.Net.Analysis.TokenStream ts = a.TokenStream(s, reader);
bool hasnext = ts.IncrementToken();
Lucene.Net.Analysis.Tokenattributes.ITermAttribute ita;
while (hasnext)
{
ita = ts.GetAttribute<Lucene.Net.Analysis.Tokenattributes.ITermAttribute>();
Console.WriteLine(ita.Term);
hasnext = ts.IncrementToken();
}
ts.CloneAttributes();
reader.Close();
a.Close();
Console.ReadKey();
}