Lucene索引维护(四)

一、索引库的添加

//添加索引	@Test	public void addDocument() throws Exception {		//索引库存放路径		Directory directory = FSDirectory.open(new File("D://temp//0108//index"));				IndexWriterConfig config = new IndexWriterConfig(Version.LATEST, new IKAnalyzer());		//创建一个indexwriter对象		IndexWriter indexWriter = new IndexWriter(directory, config);		//创建一个Document对象		Document document = new Document();		//向document对象中添加域。		//不同的document可以有不同的域，同一个document可以有相同的域。		document.add(new TextField("filename", "新添加的文档", Store.YES));		document.add(new TextField("content", "新添加的文档的内容", Store.NO));		document.add(new TextField("content", "新添加的文档的内容第二个content", Store.YES));		document.add(new TextField("content1", "新添加的文档的内容要能看到", Store.YES));		//添加文档到索引库		indexWriter.addDocument(document);		//关闭indexwriter		indexWriter.close();			}
二、索引库的删除
2.1 删除全部
@Test	public void testIndexDeleteAll() throws Exception{		Analyzer analyzer = createAnalyzer();		Directory directory = createDirectory();		IndexWriter indexWriter = createIndexWriter(analyzer,directory);				indexWriter.deleteAll();		indexWriter.commit();		indexWriter.close();	}说明：将索引目录的索引信息全部删除，直接彻底删除，无法恢复。2.2 根据条件删除
@Test	public void testIndexDeleteByTerm() throws Exception{		Analyzer analyzer = createAnalyzer();		Directory directory = createDirectory();		IndexWriter indexWriter = createIndexWriter(analyzer,directory);		//根据名称进行删除		//Term词元：第一次参数:域名,第二个参数:要删除含有此关键字的数据		indexWriter.deleteDocuments(new Term("fileName","lucene"));		indexWriter.commit();		indexWriter.close();	}
三、索引库的修改
/**	 * 更新就是按照传入的Term进行搜索,如果找到结果就删除，将更新的内容重新生成一个Document对象	 * 如果没有搜索到结果，那么就将更新的内容直接添加一个新的Document对象	 * 	 */	@Test	public void testIndexUpdate() throws Exception{		Analyzer analyzer = createAnalyzer();		Directory directory = createDirectory();		IndexWriter indexWriter = createIndexWriter(analyzer,directory);				//根据文件名称进行更新		Term term = new Term("fileName","lucene");				//更新的对象		Document doc = new Document();		doc.add(new TextField("fileName", "Jack test name",Store.YES));		doc.add(new TextField("fileContext", "this is context",Store.NO));		doc.add(new LongField("fileSize", 112L,Store.NO));		indexWriter.updateDocument(term, doc);		indexWriter.commit();		indexWriter.close();	}源代码github地址：https://github.com/lucene-in-action/lucene-index-delete