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#18482

From: �߶��
Date: Tue, 10 Feb 2004 06:44

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Jakarta Lucene is a high-performance, full-featured text search engine 
written entirely in Java

http://www.apache.org


1.org.apache.lucene.analysis�� convert text into indexable tokens

Token��  index����С��λ����Ӣ����Ӧ����ָ��һ��һ�����ʣ�����������дʳ�����
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TokenStream: ��ʾToken������
Tokenizer�� һ��TokenStream ,�������Reader
����Filter�ࣺ��TokenStream������������һ��TokenStream,���й���

����Analyzer�� ����text�����TokenStream����ͬ��Analyzerʹ�ò�ͬ��Tokenizer��
������ʹ�ò�ͬ��filter���ﵽ�书��

���Բο�org.apache.lucene.analysis.de ���ѵ��ĵ�text convert�� Token��
org.apache.lucene.analysis.ru(�Ѷ��ĵ�text convert �� Token)

2.org.apache.lucene.index��
maintain and access indices

FilterIndexReader  ��������һ��IndexReader ,��filter
  FilterIndexReader.FilterTermDocs  ��TermDoc����filter,TermDoc��ʾterm��
<document,frequence>����
  FilterIndexReader.FilterTermEnum  ��TermEnum����filter,TermEnum��Term��
enumeration




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