代码片段，lucene基本操作(基于lucene4.10.2)

1.最基本的创建索引：

@Test
    public void testIndex(){
        try {
            Directory directory = FSDirectory.open(new File(LUCENE_DIRECTORY));
            IndexWriter indexWriter = new IndexWriter(directory,new IndexWriterConfig(Version.LATEST,new StandardAnalyzer()));
            Document document = new Document();
            TextField titleFiled = new TextField("name","jiaoyiping", Field.Store.YES);
            document.add(titleFiled);
            indexWriter.addDocument(document);
            indexWriter.commit();
            indexWriter.close();
        } catch (Exception e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }

 

2.使用FieldType创建索引

 

//使用FieldType创建Field(4.X之后才有)
    @Test
    public  void testCreateIndexUseFieldType(){
        try {
            Directory directory = FSDirectory.open(new File(LUCENE_DIRECTORY));
            IndexWriter indexWriter = new IndexWriter(directory,new IndexWriterConfig(Version.LATEST,new StandardAnalyzer()));
            Document document = new Document();
            FieldType titleType = new FieldType();
            titleType.setIndexed(true);//索引选项
            titleType.setStored(true); //存储选项
            Field field = new Field("title","下班",titleType);
            TextField titleFiled = new TextField("name","jiaoyiping", Field.Store.YES);
            document.add(titleFiled);
            document.add(field);
            indexWriter.addDocument(document);
            indexWriter.commit();
            indexWriter.close();
        } catch (Exception e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
    }

搜索示例：

/**
    * 搜索示例
    */
   @Test
   public void  testQuery(){
       try {
           IndexReader indexReader = DirectoryReader.open(FSDirectory.open(new File(LUCENE_DIRECTORY)));
           IndexSearcher searcher = new IndexSearcher(indexReader);
           QueryParser queryParser = new QueryParser("title",new StandardAnalyzer());
           Query query = queryParser.parse("下班");
           ScoreDoc[] docs = searcher.search(query,20).scoreDocs; //命中的数组
           for(ScoreDoc sd:docs){
               int docNumber = sd.doc;
               System.out.println("文档号: "+docNumber);
               Document doc = searcher.doc(docNumber);//根据文档号来查询文档
               System.out.println(doc.get("name"));
           } 

       } catch (Exception e) {
           e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
       }
   }