lucene组合搜索总结

1.     // 与或搜索BooleanQuery  
2.     //BooleanClause用于表示布尔查询子句关系的类，包括：BooleanClause.Occur.MUST，BooleanClause.Occur.MUST_NOT，BooleanClause.Occur.SHOULD。有以下6种组合：  
3.   
4.     //1．MUST和MUST：取得连个查询子句的交集。  
5.   
6.     //2．MUST和MUST_NOT：表示查询结果中不能包含MUST_NOT所对应得查询子句的检索结果。  
7.   
8.     //3．MUST_NOT和MUST_NOT：无意义，检索无结果。  
9.   
10.     //4．SHOULD与MUST、SHOULD与MUST_NOT：SHOULD与MUST连用时，无意义，结果为MUST子句的检索结果。与MUST_NOT连用时，功能同MUST。  
11.   
12.     //5．SHOULD与SHOULD：表示“或”关系，最终检索结果为所有检索子句的并集。 
    

 

另外， 你还可以在以上的组合之上再次组合，下面是我的应用示例

 

 

            BooleanQuery.SetMaxClauseCount(int.MaxValue);
            List<SimpleBookInfo> books = new List<SimpleBookInfo>();

            WildcardQuery wq1 = new WildcardQuery(new Term("author", "*" + author + "*"));
            WildcardQuery wq2 = new WildcardQuery(new Term("bookname", "*" + bookname + "*"));

            BooleanQuery query = new BooleanQuery();
            BooleanQuery searchQuery = new BooleanQuery();
            if (should)
            {
                searchQuery.Add(wq1, BooleanClause.Occur.SHOULD);
                searchQuery.Add(wq2, BooleanClause.Occur.SHOULD);
            }
            else
            {
                searchQuery.Add(wq1, BooleanClause.Occur.MUST);
                searchQuery.Add(wq2, BooleanClause.Occur.MUST);
            }

            query.Add(searchQuery, BooleanClause.Occur.MUST);
            if (!string.IsNullOrEmpty(Original))//2012-01-07增加正版字段过滤
            {
                if (Original.Equals("0"))
                {
                    Original = "00000000000000";//索引值竟然生成了这个MD
                }
                if (Original.Equals("1"))
                {
                    Original = "00000000000001";//索引值竟然生成了这个MD
                }
                TermQuery qu = new TermQuery(new Term("original", Original));
                query.Add(qu, BooleanClause.Occur.MUST);
            }