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@Test
public void TestInsert() throws Exception {
    IndexWriter writer = getIndexWriter(indexDir);
    Document document = new Document();
    
    document.add(new TextField("name", "hello world", Field.Store.YES));
    document.add(new TextField("describes", "测试luence", Field.Store.YES));
    writer.addDocument(document);
    writer.close();
}

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@Test
public void TestUpdate() throws Exception {
    
    IndexWriter writer = getIndexWriter(indexDir);
    Document doc = new Document();
    doc.add(new StringField("name", "ckl", Field.Store.YES));
    doc.add(new StringField("describes", "chenkailing", Field.Store.YES));
    writer.updateDocument(new Term("name", "hello world"), doc);
    
    
    writer.close();
}

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@Test
public void TestDelete() throws Exception {
    IndexWriter writer = getIndexWriter(indexDir);
    QueryParser parser = new QueryParser("name", getAnalyzer());
    Query query = parser.parse("ckl");
    
    writer.deleteDocuments(query);
    
    writer.forceMergeDeletes();
    
    writer.commit();
    writer.close();
}

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@Test
public void TestSearch() throws Exception {
    IndexReader reader = getIndexReader();
    IndexSearcher searcher = new IndexSearcher(reader);
    
    QueryParser parser = new QueryParser("name", getAnalyzer());
    
    Query query = parser.parse("ckl");
    TopDocs hits = searcher.search(query, 10);
    for (ScoreDoc sd : hits.scoreDocs) {
        Document doc = searcher.doc(sd.doc);
        System.out.println("name:" + doc.get("name") + ",describes:" + doc.get("describes"));
    }
    reader.close();
}

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public static IndexReader getIndexReader() throws Exception {
    IndexReader reader = null;
    reader = DirectoryReader.open(getDirectory(indexDir));
    
    System.out.println("当前存储的文档数:" + reader.numDocs());
    System.out.println("回收站的文档数:" + reader.numDeletedDocs());
    System.out.println("当前存储的文档数，包含回收站的文档:" + reader.maxDoc());
    return reader;
}