Lucene OR使用布爾查詢進行搜索

Question

我有一個包含多個字段的索引，其中一個是字符串字段，我在其中存儲產品的類別名稱...例如“Electronics”，“Home”，“Garden”等

new StringField("category_name", categoryName, Field.Store.YES)); //categoryName is a value such as "Electronics"

我正在執行布爾查詢以按名稱，價格和類別查找產品，但我不確定如何進行OR搜索，以便我可以同時查詢兩個類別。

我當前的查詢如下所示：

String cat = "Electronics"
TermQuery catQuery = new TermQuery(new Term("category_name", cat));
bq.add(new BooleanClause(catQuery, BooleanClause.Occur.MUST)); // where "bq" is the boolean query I am adding to, I tried .SHOULD but that didn't help either

這適用於一類搜索，但我不知道如何搜索“電子或家庭”這將是兩個類別。

Answer 1

你可以這樣寫：

BooleanQuery categoryQuery = new BooleanQuery();
TermQuery catQuery1 = new TermQuery(new Term("category_name", "Electronics"));
TermQuery catQuery2 = new TermQuery(new Term("category_name", "Home"));
categoryQuery.add(new BooleanClause(catQuery1, BooleanClause.Occur.SHOULD));
categoryQuery.add(new BooleanClause(catQuery2, BooleanClause.Occur.SHOULD));
bq.add(new BooleanClause(categoryQuery, BooleanClause.Occur.MUST));