Question

我已经使用谷歌了解一些我可以使用但没有找到的例子这与我的问题类似。这是一个完整的控制台示例，因为我已将一个虚拟Field Foo添加到值1，只是为了使我的所有文档都被排序。我不想要添加一个虚拟foo字段我只是希望能够对我的所有文档进行排序，以便根据MailDate的最新条目在我阅读时首先出现所以我在这个订单中添加20160202121314,20160222151024,20160226162344 但是当我读到时我想要相反的顺序 20160226162344,20160222151024,20160202121314

Directory directory = FSDirectory.Open(new DirectoryInfo
  (Environment.CurrentDirectory + "\\luceneIndex"));

Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_29);

var writer = new IndexWriter(directory, analyzer, true, 
   IndexWriter.MaxFieldLength.LIMITED);

var doc = new Document();
doc.Add(new Field("MailDate", "20160202121314", Field.Store.YES, 
   Field.Index.ANALYZED));

doc.Add(new Field("OrgNo", "556769-6868", Field.Store.YES, 
   Field.Index.NOT_ANALYZED));

doc.Add(new Field("Name", "The British Food Company AB", Field.Store.YES, 
   Field.Index.ANALYZED));

doc.Add(new Field("Foo", "1", Field.Store.YES, 
   Field.Index.ANALYZED));
writer.AddDocument(doc);

doc = new Document();
doc.Add(new Field("MailDate", "20160222151024", Field.Store.YES, 
   Field.Index.ANALYZED));
doc.Add(new Field("OrgNo", "556559-8033", Field.Store.YES, 
   Field.Index.NOT_ANALYZED));
doc.Add(new Field("Name", "Gult Kort AB", Field.Store.YES, 
   Field.Index.ANALYZED));
doc.Add(new Field("Foo", "1", Field.Store.YES, 
   Field.Index.ANALYZED));          
writer.AddDocument(doc);

doc = new Document();
doc.Add(new Field("MailDate", "20160226162344", Field.Store.YES, 
   Field.Index.ANALYZED));
doc.Add(new Field("OrgNo", "000000-0000", Field.Store.YES, 
   Field.Index.NOT_ANALYZED));
doc.Add(new Field("Name", "Master", Field.Store.YES, Field.Index.ANALYZED));
doc.Add(new Field("Foo", "1", Field.Store.YES, Field.Index.ANALYZED));
writer.AddDocument(doc);
writer.Dispose();

// Find all docs whose Foo contains 1, ordered by MailDate
var query = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "Foo", new 
   StandardAnalyzer(Version.LUCENE_29)).Parse("1");
var searcher = new IndexSearcher(directory, true);
try
{
    var sort = new Sort(new SortField("MailDate", SortField.LONG, true));
    var results = searcher.Search(query, null, 1000, sort);
    foreach (var hit in results.ScoreDocs)
    {
        Document document = searcher.Doc(hit.Doc);
        Console.WriteLine("\tFound match: {0}", document.Get("MailDate"));
    }
}

//托尼

Answer 1

这将用于排序

   writer.Dispose();

   var numRangeQuery = NumericRangeQuery.NewLongRange("MailDate", 0L, 
      long.MaxValue, true, true);

   var searcher = new IndexSearcher(luceneIndexDirectory, true);

   var sort = new Sort(new SortField("MailDate", SortField.LONG, true));

   var results = searcher.Search(numRangeQuery, null, 50, sort);

   searcher.Search(numRangeQuery, null, 50, sort);

排序后的数据位于results.ScoreDocs中。 //托尼

//托尼

如何在MailDate上对我的所有文档进行排序，而不添加值为1

1 个答案: