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lucene简单实例
创建索引的代码如下:
package com.search.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.StringField;import org.apache.lucene.document.TextField;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.index.IndexWriterConfig;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import org.apache.lucene.util.Version;import org.junit.Before;import org.junit.Test;public class IndexFile { protected String[] ids={"1", "2"}; protected String[] content={"Amsterdam has lost of add cancals", "i love add this girl"}; protected String[] city={"Amsterdam", "Venice"}; private Directory dir; /** * 初始添加文档 * @throws Exception */ @Test public void init() throws Exception { String pathFile="D://lucene/index"; dir=FSDirectory.open(new File(pathFile)); IndexWriter writer=getWriter(); for(int i=0; i < ids.length; i++) { Document doc=new Document(); doc.add(new StringField("id", ids[i], Store.YES)); doc.add(new TextField("content", content[i], Store.YES)); doc.add(new StringField("city", city[i], Store.YES)); writer.addDocument(doc); } System.out.println("init ok?"); writer.close(); } /** * 获得IndexWriter对象 * @return * @throws Exception */ public IndexWriter getWriter() throws Exception { Analyzer analyzer=new StandardAnalyzer(Version.LUCENE_40); IndexWriterConfig iwc=new IndexWriterConfig(Version.LUCENE_40, analyzer); return new IndexWriter(dir, iwc); }}
说明下:lucene4.0中有核心包和其他包:我导入
package com.search.lucene;import java.io.File;import org.apache.lucene.document.Document;import org.apache.lucene.index.DirectoryReader;import org.apache.lucene.index.IndexReader;import org.apache.lucene.index.Term;import org.apache.lucene.search.IndexSearcher;import org.apache.lucene.search.ScoreDoc;import org.apache.lucene.search.TermQuery;import org.apache.lucene.search.TopDocs;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import org.junit.Test;public class IndexSearch { /** * 查询 * @throws Exception */ @Test public void search() throws Exception { String filePath="D://lucene/index"; Directory dir=FSDirectory.open(new File(filePath)); IndexReader reader=DirectoryReader.open(dir); IndexSearcher searcher=new IndexSearcher(reader); Term term=new Term("content", "add"); TermQuery query=new TermQuery(term); TopDocs topdocs=searcher.search(query, 5); ScoreDoc[] scoreDocs=topdocs.scoreDocs; System.out.println("查询结果总数---" + topdocs.totalHits+"最大的评分--"+topdocs.getMaxScore()); for(int i=0; i < scoreDocs.length; i++) { int doc = scoreDocs[i].doc; Document document = searcher.doc(doc); System.out.println("content===="+document.get("content")); System.out.println("id--" + scoreDocs[i].doc + "---scors--" + scoreDocs[i].score+"---index--"+scoreDocs[i].shardIndex); } reader.close(); }}
result:
查询结果总数---2最大的评分--0.2972674
content====i love add this girlid--1---scors--0.2972674---index---1content====Amsterdam has lost of add cancalsid--0---scors--0.26010898---index---1
lucene简单实例
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