Lucene4.3.1实现索引创建和索引检索

作为全文检索的的工具包——Lucene&＃xff0c;自诞生后就备受瞩目。但由于版本更新较快&＃xff0c;新版本稳定不佳&＃xff0c;因此我还是选择4.3.x系列的稳定版本作为练习之用。索引创建和索引检索的代码如下所示&＃xff1a;

一、首先工程得导入lucene依赖的各个jar包&＃xff0c;以免报错。

二、索引创建

package com.test.lucene;import java.io.File;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.IntField;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;/**
* Filename: IndexCreat.java
* Copyright: Copyright (c)2010
* Company: com
* &＃64;version: 1.0
* &＃64;since: JDK 1.6.0_21
* Create at: 2016年6月3日 上午12:04:10
* Description: Create Index
*
* Modification History:
* Date Author Version Description
* -----------------------------------------------------------------
* 2016年6月3日 Kevin-YE 1.0 1.0 Version
**/
public class IndexCreat {public static void main(String[] args) {Analyzer analyzer &＃61; new StandardAnalyzer(Version.LUCENE_43); //standard AnalyzerIndexWriterConfig indexWriterConfig &＃61; new IndexWriterConfig(Version.LUCENE_43, analyzer);indexWriterConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);//set index open modeDirectory directory &＃61; null; //Index storageIndexWriter indexWriter &＃61; null;try {directory &＃61; FSDirectory.open(new File("F://index/Test"));if(indexWriter.isLocked(directory)){indexWriter.unlock(directory);}indexWriter &＃61; new IndexWriter(directory, indexWriterConfig);}catch(Exception e) {e.printStackTrace();}Document doc1 &＃61; new Document();doc1.add(new StringField("id", "akfjjf", Store.YES ));doc1.add(new TextField("content", "普天同庆", Store.YES ));doc1.add(new IntField("num", 1, Store.YES));try {indexWriter.addDocument(doc1);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}Document doc2 &＃61; new Document();doc2.add(new StringField("id", "", Store.YES ));doc2.add(new TextField("content", "阳光普照", Store.YES ));doc2.add(new IntField("num", 2, Store.YES));try { //close resourceindexWriter.commit();indexWriter.close();directory.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

索引创建成功后&＃xff0c;可在F盘下找到Index/Test目录。在这里&＃xff0c;我们使用工具Luke4.3.1进行验证索引是否创建成功。请注意&＃xff1a;Luke工具包要和Lucene工具包版本一致&＃xff0c;否则会出现"read past eof"的错误。

三、索引检索

package com.test.lucene;import java.io.File;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;/**
* Filename: IndexSearch.java
* Copyright: Copyright (c)2010
* Company: com
* &＃64;version: 1.0
* &＃64;since: JDK 1.6.0_21
* Create at: 2016年6月3日 下午10:38:57
* Description: Index search
*
* Modification History:
* Date Author Version Description
* -----------------------------------------------------------------
* 2016年6月3日 Kevin-Ye 1.0 1.0 Version
**/
public class IndexSearch {public static void main(String[] args) {Directory directory &＃61; null;try {directory &＃61; FSDirectory.open(new File("F://Index/Test"));DirectoryReader dReader &＃61; DirectoryReader.open(directory); // read index fileIndexSearcher indexSearcher &＃61; new IndexSearcher(dReader); // create index objectAnalyzer analyzer &＃61; new StandardAnalyzer(Version.LUCENE_43);QueryParser parser &＃61; new QueryParser(Version.LUCENE_43, "content",analyzer); //set index query stringQuery query &＃61; parser.parse("普天同庆");TopDocs topDocs &＃61; indexSearcher.search(query, 10);if(topDocs !&＃61; null) {System.out.println("查询到符合文档总数为&＃xff1a;"&＃43; topDocs.totalHits);for(int i &＃61; 0; i

运行结果如下所示&＃xff1a;