問題描述

我有一個包含多個字段的索引，其中一個是一個字符串字段，我在其中存儲產品的類別名稱......例如電子產品"、家庭"、花園"等

I have an index with multiple fields, one of which is a string field in which I store category names for a product... such as "Electronics", "Home", "Garden", etc

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 搜索以便同時查詢兩個類別.

I am performing a Boolean query to find products by name, price, and category but I'm not sure how to do an OR search so that I can query for two categories at the same time.

我當前的查詢如下所示:

My current query looks like this:

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

這適用于一個類別搜索，但我不確定如何搜索電子產品或家庭"這兩個類別.

this works fine for a one category search, but I am not sure how to search "Electronics OR Home" which would be two categories.

推薦答案

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));

這篇關于Lucene OR 使用布爾查詢進行搜索的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！