lucene删除索引——（五）

//
    public IndexWriter getIndexWriter() throws Exception{
        // 第一步：创建一个java工程，并导入jar包。
        // 第二步：创建一个indexwriter对象。
        Directory directory = FSDirectory.open(new File("E:\\lucene&solr\\index"));
        // Directory directory = new RAMDirectory();//保存索引到内存中 （内存索引库）
        Analyzer analyzer = new StandardAnalyzer();// 官方推荐
        IndexWriterConfig config = new IndexWriterConfig(Version.LATEST, analyzer);
        return new IndexWriter(directory, config);
    }

1 //全删除
2     @Test
3     public void testAllDelete() throws Exception {
4         IndexWriter indexWriter = getIndexWriter();
5         indexWriter.deleteAll();
6         indexWriter.close();
7     }

//根据条件删除
    @Test
    public void testDelete() throws Exception {
        IndexWriter indexWriter = getIndexWriter();
        Query query = new TermQuery(new Term("fileName","springmvc"));
        indexWriter.deleteDocuments(query);
        indexWriter.close();
    }