Lucene:如何获得文档的分数 [英] Lucene: how to get the score of a document
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问题描述
我想输出文档分数.我为此编写的代码是:
I want to output the score of documents. The code I write for this is that:
IndexReader reader = IndexReader.open(FSDirectory.open(indexDir));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new IKAnalyzer();
QueryParser parser = new QueryParser(Version.LUCENE_31, "title",
analyzer);
Query q = null;
q = parser.parse("MacOS");
TopDocs docs = searcher.search(q, 10);
ScoreDoc[] hits = docs.scoreDocs;
for(int i=0;i<hits.length;++i){
System.out.println(hits[i].score);
}
,但输出为NaN.我想知道如何获得文件的分数.
but the output is NaN. I want to know how to get the score of the document.
推荐答案
IndexReader reader = IndexReader.open(FSDirectory.open(indexDir));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new IKAnalyzer();
QueryParser parser = new QueryParser(Version.LUCENE_31, "title", analyzer);
Query q = null;
q = parser.parse("MacOS");
TopDocs docs = searcher.search(q, 10);
ScoreDoc[] filterScoreDosArray = docs.topDocs().scoreDocs;
for (int i = 0; i < filterScoreDosArray.length; ++i) {
int docId = filterScoreDosArray[i].doc;
Document d = is.doc(docId);
System.out.println((i + 1) + ". " + d.get("docno")+" Score: "+ filterScoreDosArray[i].score);
}
尝试一下.
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