Lucene Multifield 검색

Question

Lucene을 사용하여 Books 데이터베이스에서 다중 필드 레벨 검색을 수행해야합니다.

예를 들어

: 내 검색 기준은 같은 것입니다 : a1, t1 등은 각각 저자 이름과 책 제목입니다

(Author:a1 and title:t1) OR (Author:a2 and title:t2) OR (Author:a3 and title:t3) 

. 이런 종류의 기준을 위해 만들어진 Lucene Query 객체를 얻으려면 어떻게해야합니까?

감사합니다.

Answer 1

다음 코드는 a1, a2, a3, t1, t2, t3이 용어라고 가정합니다. 문구 인 경우 TermQuery 대신 PhraseQuery를 사용해야합니다.

// Create a BooleanQuery for (Author:a1 and title:t1) 

BooleanQuery a1AndT1 = new BooleanQuery(); 
a1AndT1.add(new TermQuery(new Term("Author", "a1")), BooleanClause.Occur.MUST); 
a1AndT1.add(new TermQuery(new Term("title", "t1")), BooleanClause.Occur.MUST); 

// Create a BooleanQuery for (Author:a2 and title:t2) 

BooleanQuery a2AndT2 = new BooleanQuery(); 
a2AndT2.add(new TermQuery(new Term("Author", "a2")), BooleanClause.Occur.MUST); 
a2AndT2.add(new TermQuery(new Term("title", "t2")), BooleanClause.Occur.MUST); 

// Create a BooleanQuery for (Author:a3 and title:t3) 

BooleanQuery a3AndT3 = new BooleanQuery(); 
a3AndT3.add(new TermQuery(new Term("Author", "a3")), BooleanClause.Occur.MUST); 
a3AndT3.add(new TermQuery(new Term("title", "t3")), BooleanClause.Occur.MUST); 

// Create a BooleanQuery that combines the OR-clauses 

BooleanQuery query = new BooleanQuery(); 
query.add(a1AndT1, BooleanClause.Occur.SHOULD); 
query.add(a2AndT2, BooleanClause.Occur.SHOULD); 
query.add(a3AndT3, BooleanClause.Occur.SHOULD); 

// As you can see, the resulting Lucene query is 
// (+Author:a1 +title:t1) (+Author:a2 +title:t2) (+Author:a3 +title:t3) 
// which behaves the same as something like 
// (Author:a1 and title:t1) OR (Author:a2 and title:t2) OR (Author:a3 and title:t3) 

System.out.println(query);