使用lucene.net进行条件搜索

以下方式我用lucene.net进行搜索。 此例程搜索多个单词，对所有索引字段称为“标题”，“描述”，“URL”，“国家” 。

我需要知道如何给出像country =’UK’或country =’US’这样的条件

我希望多个单词应该像下面这样搜索，但我想在国家是英国时添加一个更多的条款。 所以请指导我在我的代码中添加什么。

if (!string.IsNullOrEmpty(multiWordPhrase)) { string[] fieldList = { "Title", "Description", "Url" }; List occurs = new List(); foreach (string field in fieldList) { occurs.Add(BooleanClause.Occur.SHOULD); } searcher = new IndexSearcher(_directory, false); Query qry = MultiFieldQueryParser.Parse(Version.LUCENE_29, multiWordPhrase, fieldList, occurs.ToArray(), new StandardAnalyzer(Version.LUCENE_29)); TopDocs topDocs = searcher.Search(qry, null, ((PageIndex + 1) * PageSize), Sort.RELEVANCE); ScoreDoc[] scoreDocs = topDocs.ScoreDocs; int resultsCount = topDocs.TotalHits; list.HasData = resultsCount; StartRecPos = (PageIndex * PageSize) + 1; if (topDocs != null) { for (int i = (PageIndex * PageSize); i <= (((PageIndex + 1) * PageSize)-1) && i < topDocs.ScoreDocs.Length; i++) { Document doc = searcher.Doc(topDocs.ScoreDocs[i].doc); oSr = new Result(); oSr.ID = doc.Get("ID"); oSr.Title = doc.Get("Title"); oSr.Description = doc.Get("Description"); //oSr.WordCount = AllExtension.WordCount(oSr.Description, WordExist(oSr.Title, multiWordPhrase)); string preview = oSr.Description = BBAReman.AllExtension.HighlightKeywords(oSr.Description, multiWordPhrase); //sr.Description; oSr.Url = doc.Get("Url"); TmpEndRecpos++; list.Result.Add(oSr); } } 

谢谢

Answer 1

查找BooleanQuery

 if (!string.IsNullOrEmpty(multiWordPhrase)) { BooleanQuery bq = new BooleanQuery(); string[] fieldList = { "Title", "Description", "Url" }; List occurs = new List(); foreach (string field in fieldList) { occurs.Add(BooleanClause.Occur.SHOULD); } Query qry = MultiFieldQueryParser.Parse(Version.LUCENE_29, multiWordPhrase, fieldList, occurs.ToArray(), new StandardAnalyzer(Version.LUCENE_29)); bq.Add(qry,BooleanClause.Occur.Must); //this is the country query (modify the Country field name to whatever you have) string country = "UK"; Query q2 = new QueryParser(Version.LUCENE_CURRENT, "Country", analyzer).parse(country); bq.Add(q2,BooleanClause.Occur.Must); searcher = new IndexSearcher(_directory, false); TopDocs topDocs = searcher.Search(bq, null, ((PageIndex + 1) * PageSize), Sort.RELEVANCE); ScoreDoc[] scoreDocs = topDocs.ScoreDocs; int resultsCount = topDocs.TotalHits; list.HasData = resultsCount; StartRecPos = (PageIndex * PageSize) + 1; if (topDocs != null) { //loop through your results }