lucene3.0学习——查询

import java.io.File;import java.util.Scanner;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.document.Document;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.TopScoreDocCollector;import org.apache.lucene.store.FSDirectory;import org.apache.lucene.util.Version;public class LuceneSearchTest {private static String IndexDir = "D://test//index//";public static void main(String args[]) {System.out.println("input the keywords");Scanner cin = new Scanner(System.in);String keywords = cin.next();try {IndexSearcher is = new IndexSearcher(FSDirectory.open(new File(IndexDir)), true);TopScoreDocCollector c = TopScoreDocCollector.create(100, false);// doc 中没有的，第一个是版本，第二个是field名称，第三个是分析器QueryParser qp = new QueryParser(Version.LUCENE_CURRENT, "contents",new StandardAnalyzer(Version.LUCENE_CURRENT));Query q = qp.parse(keywords);is.search(q, c);ScoreDoc[] hits = c.topDocs().scoreDocs;System.out.println(hits.length);for (ScoreDoc s : hits) {// hits中的元素s有个属性doc返回doc的id值，然后，//IndexSearcher有个方法doc（i）返回第i个Document对象，Document d = is.doc(s.doc);System.out.println("find the doc :"+s.doc+" name: "+d.getField("filename")+"the "+s.toString());}System.out.println("find files total num:"+c.getTotalHits());} catch (Exception e) {// TODO: handle exception}}}

这个建立的索引是另外一个，是建立的很多文档的一个索引，其中有个函数在3.0的API中没有。