问如何使用lucene搜索

EN

public void doSearch() throws Exception {
        String key = "且试天下";
        Path path = FileSystems.getDefault().getPath("D:/Lucene/StoryExercise", "index");
        Directory directory = new NIOFSDirectory(path);
        IndexReader ir = DirectoryReader.open(directory);
        IndexSearcher is = new IndexSearcher(ir);
        Analyzer analyzer = new SmartChineseAnalyzer();
        Builder builder = new BooleanQuery.Builder();
        QueryParser qp = new ComplexPhraseQueryParser("filename", analyzer);
        Query parse = qp.parse(key);
        builder.add(new BooleanClause(parse, BooleanClause.Occur.MUST));
        BooleanQuery build = builder.build();
        TopDocs td = is.search(build, 100);
        ScoreDoc[] docs = td.scoreDocs;
        Document doc = null;
        int i = 1;
        for (ScoreDoc sd : docs) {
            doc = is.doc(sd.doc);
            System.out.println(doc.get("filename") + "  HAS THE WORD : " + key + i++);
        }
    }

public void doIndex() throws Exception {
        Path path = FileSystems.getDefault().getPath("D:/Lucene/StoryExercise", "index");
        Directory directory = new NIOFSDirectory(path);
        Analyzer analyzer = new SmartChineseAnalyzer();
        IndexWriterConfig iwc = new IndexWriterConfig(analyzer);
        IndexWriter iw = new IndexWriter(directory, iwc);

        File filedir = new File("D:/Lucene/StoryExercise/data");
        Document doc = null;
        for (File file : filedir.listFiles()) {
            doc = new Document();
            doc.add(new TextField("path", file.getPath(), Field.Store.YES));
            doc.add(new TextField("filename", file.getName(), Field.Store.YES));
            doc.add(new TextField("content", new FileReader(file)));
            iw.addDocument(doc);
        }
        iw.close();
    }