lucene的一简单例子

1.引入lucene包，用到了Junit，包搞进来就可以了
2.先跑建立索引文件的单元测试，有了索引才能查询嘛，然后在跑下面的检索数据方法
3.目录根据自己需要更改哦

private final String indexPath = "E:/lucene";
private final String searchPath = "E:/123";

	@Test
	/**
	 * 建立索引文件
	 */
	public void createIndexFiles() throws Exception {
		Directory d = new SimpleFSDirectory(new File(indexPath));// 创建索引的目录
		IndexWriter iw = new IndexWriter(d, new StandardAnalyzer(
				Version.LUCENE_29), true, MaxFieldLength.UNLIMITED);
		File f = new File(searchPath);// 要检索的目录
		addToWriter(f, iw);
		iw.close();
	}

	/**
	 * 递归调用检索文件夹
	 * 
	 * @param f
	 * @param iw
	 * @throws Exception
	 */
	public void addToWriter(File f, IndexWriter iw) throws Exception {
		if (f.isDirectory()) {
			File[] files = f.listFiles();
			for (int i = 0; i < files.length; i++)
				addToWriter(files[i], iw);
		} else if (f.getName().endsWith(".html")
				|| f.getName().endsWith(".txt")) {
			Document doc = new Document();
			/**
			 * Store.YES 存储 Index.NO 词法分析器不在解析此Field
			 */
			doc.add(new Field("title", f.getName(), Store.YES, Index.NO));
			doc.add(new Field("content", new FileReader(f)));
			iw.addDocument(doc);
		}
	}

	/**
	 * 检索数据
	 * 
	 * @throws Exception
	 */
	@Test
	public void search() throws Exception {
		Directory d = new SimpleFSDirectory(new File(indexPath));
		IndexSearcher search = new IndexSearcher(d, true);
		QueryParser qp = new QueryParser(Version.LUCENE_29, "content",
				new StandardAnalyzer(Version.LUCENE_29));
		/**
		 * 检索关键字，其实Google地址栏里就是输入的这里哦，当然Google肯定是自己公司的搜索技术，这里只是举例
		 */
		Query query = qp.parse("content");
		TopDocs tp = search.search(query, 100);
		System.out.println("检索到：" + tp.totalHits + "个文件包含此数据");
		for (int i = 0; i < tp.scoreDocs.length; i++) {
			int num = tp.scoreDocs[i].doc;
			Document doc = search.doc(num);
			System.out.println("文件名为:" + doc.get("title"));
		}
	}