Lucene3.5 实现创建索引和搜索实例
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???????最近在做关于大数据量查询，发现Lucene是个不错的选择。关于Luncene3.5的代码在网上不是很多，参考网上一些代码并看API，做出如下代码，有什么问题，给留言。
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?????? 1.数据库作为数据源，创建索引：
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//创建索引public void createIndex(OpenMode openMode,List<Authors> list){ try {IndexWriter indexWriter=null;try {indexWriter=new LTes ().createIndexWriter(openMode);} catch (Exception e) {e.printStackTrace();}//List<Authors> list=new PersistenceFacade().query("from Authors where id=300");for(Authors au:list){ Document doc=new Document(); doc.add(new Field("id",au.getId()+"",Field.Store.YES,Field.Index.ANALYZED)); doc.add(new Field("authorName",au.getAuthorName(),Field.Store.YES,Field.Index.ANALYZED)); doc.add(new Field("authorID",au.getAuthorID(),Field.Store.YES,Field.Index.NO)); doc.add(new Field("phone",au.getPhone(),Field.Store.YES,Field.Index.NO)); doc.add(new Field("Address",au.getAddress() ,Field.Store.YES,Field.Index.NO)); doc.add(new Field("City",au.getAuthorID(),Field.Store.YES,Field.Index.NO)); doc.add(new Field("status",au.getPhone(),Field.Store.YES,Field.Index.NO)); doc.add(new Field("zip",au.getPhone(),Field.Store.YES,Field.Index.NO)); //indexWriter.addDocument(doc); if (indexWriter.getConfig().getOpenMode() == IndexWriterConfig.OpenMode.CREATE) { logger.info("OpenModel:CREATE"); indexWriter.addDocument(doc); } else { logger.info("OpenModel:APPEND"); indexWriter.updateDocument(new Term("id",String.valueOf(au.getId())), doc); }}indexWriter.close();} catch (CorruptIndexException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} } ?
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???????? 提示：? indexWriter.updateDocument(new Term("id","123"), doc);
?? 表示更新ID为123的索引，如果没有则新增。
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/** * 创建索引 * @return */public IndexWriter createIndexWriter(OpenMode openMode)throws Exception{//索引存放位置设置Directory dir = FSDirectory.open(new File("E:\\index"));// 索引配置类设置IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_35,new StandardAnalyzer(Version.LUCENE_35));iwc.setOpenMode(openMode);IndexWriter writer = new IndexWriter(dir, iwc);return writer;}?
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?? 2.检索数据：
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public List<Authors> search(String queryString) throws Exception{String[] queryFields={"authorName"};List<Authors> list=new ArrayList<Authors>();IndexReader reader=IndexReader.open(FSDirectory.open(new File("E:\\index")));IndexSearcher searcher=new IndexSearcher(reader);QueryParser parser = new MultiFieldQueryParser(Version.LUCENE_35, queryFields,new StandardAnalyzer(Version.LUCENE_35));Query query = parser.parse(queryString);TopDocs results = searcher.search(query,null,1000);ScoreDoc[] hits=results.scoreDocs;for(ScoreDoc sd:hits){ int docID=sd.doc; Document doc=searcher.doc(docID); Authors authors=new Authors(); authors.setId(Integer.valueOf(doc.get("id"))); authors.setAddress(doc.get("Address")); authors.setAuthorID(doc.get("authorID")); authors.setAuthorName(doc.get("authorName")); authors.setCity(doc.get("city")); authors.setPhone(doc.get("phone")); authors.setStatus(doc.get("status")); authors.setZip(doc.get("zip")); list.add(authors);}return list;//System.out.println("总符合: " + results.totalHits + "条数！");}?
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???????? 以上是Lucene3.5创建索引和检索索引的方法。
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1 楼 649199285 2012-02-03 我想问一下 你这个OpenMode是怎么个用法。 2 楼 SteveLee 2012-02-10 创建索引调用createIndex(OpenMode.APPEND);OpenMode 有两个属性APPEND和CREATE。APPEND表示在原来的基础上增加索引，CREATE表示重新创建索引 。 3 楼 walong2012 2012-06-18 请问可以给完整的实例吗可以部署的，我是刚刚学lucene，想通过成功运行后读源码