Lucene初体验——Hello Word实现

 1 /** 2 ?????* 建立索引 3 ?????*/ 4 ????public void index(){ 5 ????????IndexWriter writer=null; 6 ????????try { 7 ????????????//1.创建Directory 8 ????????????//Directory directory=new RAMDirectory();//建立在内存中 9 ????????????Directory directory=FSDirectory.open(new File("D:/lucene/lucene01"));//创建在硬盘上10 ????????????//2.创建IndexWrite11 ????????????IndexWriterConfig iwc=new IndexWriterConfig(Version.LUCENE_35,new StandardAnalyzer(Version.LUCENE_35));12 ????????????writer=new IndexWriter(directory, iwc);13 ????????????//3.创建Document对象14 ????????????Document doc=null;15 ????????????//4.为Document添加Field16 ????????????File f=new File("D:/lucene/example");17 ????????????for (File file:f.listFiles()) {18 ????????????????doc=new Document();19 ????????????????doc.add(new Field("content",new FileReader(file)));20 ????????????????doc.add(new Field("filename",file.getName(),Field.Store.YES,Field.Index.NOT_ANALYZED));21 ????????????????doc.add(new Field("path",file.getAbsolutePath(),Field.Store.YES,Field.Index.NOT_ANALYZED));22 ????????????????//5.通过Index Writer添加文档到索引中23 ????????????????writer.addDocument(doc);24 ????????????}25 26 27 28 ????????} catch (IOException e) {29 ????????????// TODO Auto-generated catch block30 ????????????e.printStackTrace();31 ????????}finally{32 ????????????if(writer!=null){33 ????????????????try {34 ????????????????????writer.close();35 ????????????????} catch (IOException e) {36 ????????????????????// TODO Auto-generated catch block37 ????????????????????e.printStackTrace();38 ????????????????}39 ????????????}40 ????????}41 42 ????}

 1 /*** 2 ?????* 搜索 3 ?????*/ 4 ????public void searcher(){ 5 ????????try { 6 ????????????//1.创建Directory 7 ????????????Directory directory=FSDirectory.open(new File("D:/lucene/lucene01"));//创建在硬盘上 8 ????????????//2.创建IndexReader 9 ????????????IndexReader reader=IndexReader.open(directory);10 ????????????//3.根据IndexReader创建IndexSearcher11 ????????????IndexSearcher searcher=new IndexSearcher(reader);12 ????????????//4.创建搜索的Query13 ????????????//创建parser来确定要搜索文件的内容，第二个参数表示搜索的域14 ????????????QueryParser parser=new QueryParser(Version.LUCENE_35, "content", new StandardAnalyzer(Version.LUCENE_35));15 ????????????//创建query，表示搜索域为content中包含Java的文档16 ????????????Query query=parser.parse("migrate");17 ????????????//5.根据searcher搜索并且返回TopDocs18 ????????????//10 搜索条数19 ????????????TopDocs tds=searcher.search(query, 10);20 ????????????//6.根据TopDocs获取ScoreDoc对象21 ????????????ScoreDoc[] sds= tds.scoreDocs;22 ????????????for (ScoreDoc sd : sds) {23 ????????????????//7.根据searcher和ScoreDoc对象获取具体的document对象24 ????????????????Document d=searcher.doc(sd.doc);25 ????????????????//8.根据Document对象获取需要的值26 ????????????????System.out.println(d.get("filename")+"["+d.get("path")+"]");27 ????????????}28 ????????????29 ????????????30 ????????????//9.关闭reader31 ????????????reader.close();32 ????????} catch (CorruptIndexException e) {33 ????????????// TODO Auto-generated catch block34 ????????????e.printStackTrace();35 ????????} catch (IOException e) {36 ????????????// TODO Auto-generated catch block37 ????????????e.printStackTrace();38 ????????} catch (ParseException e) {39 ????????????// TODO Auto-generated catch block40 ????????????e.printStackTrace();41 ????????}42 ????}

 1 ????????@Test 2 ????public void testIndex(){ 3 ????????HelloLucene hl=new HelloLucene(); 4 ????????hl.index(); 5 ????} 6 ?????7 ????@Test 8 ????public void testSearch(){ 9 ????????HelloLucene hl=new HelloLucene();10 ????????hl.searcher();11 ????} ???