06Lucene索引库的删除

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删除全部

//删除全部索引
	@Test
	public void deleteAllIndex() throws Exception {
		IndexWriter indexWriter = getIndexWriter();
		//删除全部索引
		indexWriter.deleteAll();
		//关闭indexwriter
		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。

此方法慎用！！

指定查询条件删除

//根据查询条件删除索引
	@Test
	public void deleteIndexByQuery() throws Exception {
		IndexWriter indexWriter = getIndexWriter();
		//创建一个查询条件
		Query query = new TermQuery(new Term("filename", "apache"));
		//根据查询条件删除
		indexWriter.deleteDocuments(query);
		//关闭indexwriter
		indexWriter.close();
	}