Lucene TermQuery 和 QueryParser
我有 2 个 lucene 查询:
I have 2 lucene queries:
1)
Term term = new Term(Properties.LUCENE_APPARTMENT_ADDRESS,address);
Query termQuery = new TermQuery(term);
TopDocs topDocs = indexSearcher.search(termQuery, 20);
和2)
QueryParser queryParser = new QueryParser(Version.LUCENE_36, Properties.LUCENE_APPARTMENT_ADDRESS, analyzer);
Query query = queryParser.parse(address);
ScoreDoc[] queryResults = indexSearcher.search(query, 20).scoreDocs;
为什么第一个返回 1 个结果,而第二个什么也不返回?(地址为一个字以上)
Why the first one returns 1 result where the 2nd returns nothing? (the address is one word or more)
推荐答案
当您使用 QueryParser
时,它会使用分析器执行与索引期间相同的操作序列(标记化、小写、停用词等).
When you use QueryParser
, it uses analyzer which does the same sequence of actions as when during the indexing (tokenization, lowercasing, stopwords, etc.).
当您使用原始 TermQuery
时,您需要自己完成所有这些步骤.
When you use raw TermQuery
, you need to do all these steps yourself.
我猜你的分析器对 Properties.LUCENE_APPARTMENT_ADDRESS
做了一些特别的事情,而你在将地址传递给 TermQuery
时没有这样做,因此搜索结果存在差异.
I guess your analyzer does something special about Properties.LUCENE_APPARTMENT_ADDRESS
and you are not when passing the address to TermQuery
hence the search results discrepancy.
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