Lucene 3.4查询基本过程（有源码）

最新推荐文章于 2022-05-12 17:59:48 发布

原创最新推荐文章于 2022-05-12 17:59:48 发布 · 1.3k 阅读

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#lucene #string #query #search #class #file

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本文介绍如何使用Lucene库实现专利搜索功能，通过构建索引目录、解析查询字符串并执行全文检索来查找匹配的文档。

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public class Searcher {

	 * main(这里用一句话描述这个方法的作用)   
	public static void main(String[] args) throws IOException, ParseException {
		String indexDir = "F:/lucene/indexDir";
		String queryString = "patent AND freedom";
		
		search(indexDir, queryString);
	}
	
	public static void search( String indexDir, String queryString ) throws IOException, ParseException {
		Directory dir = FSDirectory.open( new File( indexDir ) );
		IndexSearcher indexSearcher = new IndexSearcher( dir );
		QueryParser queryParser = new QueryParser( Version.LUCENE_34, "contents", new StandardAnalyzer( Version.LUCENE_34 ) );
		Query query = queryParser.parse( queryString );
		
		long beginQueryTime = System.currentTimeMillis();
		TopDocs hits = indexSearcher.search( query, 10 );
		long endQueryTime = System.currentTimeMillis();
		
		System.err.println( "Found " + hits.totalHits + " document(s) in " + (endQueryTime - beginQueryTime) +
				" milliseconds that matched query '" + queryString + "':");
		
		for (ScoreDoc scoreDoc : hits.scoreDocs) {
			Document doc = indexSearcher.doc( scoreDoc.doc );
			System.out.println( doc.get("fullpath") );
		}
		
		indexSearcher.close();
	}
}