Lucene Query返回空字符串的索引搜索

Question

The following lucene query return empty string please help me thank's in advance

Analyzer analyzer = new StandardAnalyzer();
QueryParser qParser = new QueryParser(Version.LUCENE_40,"file_name",analyzer);
 Query query = qParser.parse(filename);

Answer 1

While creating an object of QueryParser you will have to specify the version also.

I will recommend you to use Version_36 instead.

QueryParser qParser = new QueryParser(Version.LUCENE_36,"file_name",new StandardAnalyzer(Version.LUCENE_36));
Query query = qParser.parse(filename);