lucene标题/内容搜索

Question

I'm storing my lucene docs like so:

Document doc = new Document();
doc.add(new TextField("contents", "Homer January, Lenny February"));
doc.add(new TextField("title", "2017 on call schedule.xls", Field.Store.YES));

Document doc = new Document();
doc.add(new TextField("contents", "Carl January, Frank February"));
doc.add(new TextField("title", "2018 on call schedule.xls", Field.Store.YES));

I can get a hit if I search for the exact title, or for like

2017

but no hits if i try things like

call
on call
xls

I've tried simple things like

 Query query1 = new QueryParser("title", analyzer).parse("on call");

and more complicated ideas like

Builder bb = new BooleanQuery.Builder();
for(String chunk : "on call".split(" ")){
    bb.add(new TermQuery(new Term("title", chunk)), BooleanClause.Occur.SHOULD);
}
BooleanQuery booleanQuery = bb.build();

maybe I'm storing my Docs wrong?

I'm using the StandardAnalyzer on search & insert.

Seems like I'm missing something quite fundamental here.. Anyone have any tips please?

Answer 1

I think, its always a good idea to visualize your terms before running your search. Below is image from Luke tool.

That simply indicates that there is no term with schedule but schedule.xls .

I am using Lucene 6.6.6 and had to modify your code to ,

Document doc = new Document();

        doc.add(new TextField("contents", "Homer January, Lenny February",Store.YES));
        doc.add(new TextField("title", "2017 on call schedule.xls", Store.YES));

        iwriter.addDocument(doc);

        doc = new Document();
        doc.add(new TextField("contents", "Carl January, Frank February",Store.YES));
        doc.add(new TextField("title", "2018 on call schedule.xls", Store.YES));

        iwriter.addDocument(doc);

        iwriter.commit(); 

Now for searching

Your query parser is basically producing a query - title:schedule that means an exact search ( without wild cards ) on field title and since there are no such terms , you find zero hits.

Modifying your query to - Query query1 = new QueryParser("title", analyzer).parse("schedule*"); will get you two hits.

So as a best practice, before searching , always try to have a look & visualize your indexed data.