lucene入门实例二（检索）

copy一个lucene in action的例子

 

package com.s.lucene;

import java.io.File;
import java.io.IOException;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;

public class IndexReader {

	public static void main(String[] args) throws IOException, ParseException {

		String indexDir = "F:\\workspace\\JavaDemo\\src\\com\\s\\lucene\\index";//存储lucene索引的文件夹
		String queryKey = "最优秀";//查询词
		//查询
		search(indexDir,queryKey);
	}
	
	public static void search(String indexDir,String queryKey) throws IOException, ParseException{
		Directory dir = FSDirectory.open(new File(indexDir));//创建索引文件夹
		IndexSearcher is = new IndexSearcher(dir);//查询
		
		QueryParser parser = new QueryParser(Version.LUCENE_30,
				"contents",
				new StandardAnalyzer(Version.LUCENE_30));
		Query query = parser.parse(queryKey);//封装查询为query
		long start = System.currentTimeMillis();
		TopDocs hits = is.search(query, 10);//查询
		long end = System.currentTimeMillis();
		System.out.println(end-start);
		for (ScoreDoc sd : hits.scoreDocs) {//遍历查询结果
			Document doc = is.doc(sd.doc);
			System.out.println(doc.get("fullpath"));
			System.out.println(doc.get("body"));
		}
		is.close();
	}
}