使用Lucene进行精确短语搜索？

我正在使用SpanTerm Query在lucene中搜索确切的短语。 但它似乎没有用。 这是我的代码。

索引

IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(Version.LUCENE_30), false,IndexWriter.MaxFieldLength.UNLIMITED); doc.add(new Field("contents", sb.toString(), Field.Store.YES, Field.Index.ANALYZED,Field.TermVector.WITH_POSITIONS_OFFSETS)); doc.add(new Field("imageid", imageDocument.getImageId(), Field.Store.YES, Field.Index.NOT_ANALYZED)); doc.add(new Field("title", imageDocument.getTitle(), Field.Store.YES, Field.Index.ANALYZED)); doc.add(new Field("country", imageDocument.getCountry(), Field.Store.YES, Field.Index.NOT_ANALYZED)); write.addDocument(doc); 

搜索

 String sentence = searchParameters.get("searchExactWord"); String[] words = sentence.split(" "); String queryNoWord = ""; int i = 0; SpanTermQuery [] clause = new SpanTermQuery[words.length]; for (String word : words) { clause[i] = new SpanTermQuery(new Term("contents",word)); i++; } SpanNearQuery query = new SpanNearQuery(clause, 0, true); booleanQuery.add(query, BooleanClause.Occur.MUST); 

如果我做错了，请指导我???

Prateek

Answer 1

尝试使用PhraseQuery ：

 PhraseQuery query = new PhraseQuery(); String[] words = sentence.split(" "); for (String word : words) { query.add(new Term("contents", word)); } booleanQuery.add(query, BooleanClause.Occur.MUST); 

编辑：我认为你有一个不同的问题。 您的booleanQuery还有哪些其他部分？ 这是一个搜索短语的完整工作示例：

 public class LucenePhraseQuery { public static void main(String[] args) throws Exception { // setup Lucene to use an in-memory index Directory directory = new RAMDirectory(); Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30); MaxFieldLength mlf = MaxFieldLength.UNLIMITED; IndexWriter writer = new IndexWriter(directory, analyzer, true, mlf); // index a few documents writer.addDocument(createDocument("1", "foo bar baz")); writer.addDocument(createDocument("2", "red green blue")); writer.addDocument(createDocument("3", "test foo bar test")); writer.close(); // search for documents that have "foo bar" in them String sentence = "foo bar"; IndexSearcher searcher = new IndexSearcher(directory); PhraseQuery query = new PhraseQuery(); String[] words = sentence.split(" "); for (String word : words) { query.add(new Term("contents", word)); } // display search results TopDocs topDocs = searcher.search(query, 10); for (ScoreDoc scoreDoc : topDocs.scoreDocs) { Document doc = searcher.doc(scoreDoc.doc); System.out.println(doc); } } private static Document createDocument(String id, String content) { Document doc = new Document(); doc.add(new Field("id", id, Store.YES, Index.NOT_ANALYZED)); doc.add(new Field("contents", content, Store.YES, Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS)); return doc; } } 

Answer 2

使用Lucene Query Builder，并在搜索字符串周围加上双引号。 它适用于精确短语搜索。

参考： http ： //www.lucenetutorial.com/lucene-query-builder.html

Answer 3

对于版本4.6.0索引：

 IndexWriterConfig config=new IndexWriterConfig(Version.LUCENE_46,analyzer); try { IndexWriter iwriter=new IndexWriter(mDir,config); iwriter.deleteAll(); iwriter.commit(); Document doc = new Document(); doc.add(new Field(myfieldname,text,TextField.TYPE_STORED)); iwriter.addDocument(doc); iwriter.close(); } 

搜索确切的短语（以变量关键字给出）：

 DirectoryReader ireader=DirectoryReader.open(mDir); IndexSearcher isearcher=new IndexSearcher(ireader); QueryParser parser = new QueryParser(Version.LUCENE_46,myfieldname,analyzer); parser.setDefaultOperator(QueryParser.Operator.AND); parser.setPhraseSlop(0); Query query=parser.createPhraseQuery(myfieldname,keyword); ScoreDoc[] hits=isearcher.search(query, null, 1000).scoreDocs; nret=hits.length; ireader.close(); 

注意使用“setPhraseSlop（0）和createPhraseQuery（）