deletetest.java

一段别人写的LUCENE的东东 拿来大家分享也是给新手用的 但我还有的地方没看懂呢

package ch10;

import org.apache.lucene.analysis.standard.*;
import org.apache.lucene.document.*;
import org.apache.lucene.index.*;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.*;
import org.apache.lucene.store.*;

public class DeleteTest {
	public static void main (String [] args) throws Exception {
		Document doc1 = new Document();
		doc1.add(Field.Text("name", "word1 word2 word3"));
		Document doc2 = new Document();
		doc2.add(Field.Text("name", "word4 word5 word6"));
		
		IndexWriter writer = new IndexWriter("c:\\index", new StandardAnalyzer(), true);
		writer.addDocument(doc1);
		writer.addDocument(doc2);
		writer.close();
		
		IndexReader reader = IndexReader.open("c:\\index");
		reader.delete(0);
		reader.close();
		
		IndexSearcher searcher = new IndexSearcher("c:\\index");
		Query query = null;
		Hits hits = null;
		
		query = QueryParser.parse("word1", "name", new StandardAnalyzer());
		hits = searcher.search(query);
		System.out.println("查找 word1 共" + hits.length() + "个结果");
		
		query = QueryParser.parse("word4", "name", new StandardAnalyzer());
		hits = searcher.search(query);
		System.out.println("查找 word4 共" + hits.length() + "个结果");
	}
}