Question

我只是浏览lucene.net上的文章。我使用lucene.net获得了一些创建索引的示例代码，并且我不清楚几行代码。这是那些行

    protected void btnCreateIndex_Click(object sender, EventArgs e)
{
    IndexWriter writer = new IndexWriter(MapPath("~/searchlucene/"), new StandardAnalyzer(), false);

    IndexDocument(writer, "About Hockey", "hockey", "Hockey is a cool sport which I really like, bla bla");
    IndexDocument(writer, "Some great players", "hockey", "Some of the great players from Sweden - well Peter Forsberg, Mats Sunding, Henrik Zetterberg");
    IndexDocument(writer, "Soccer info", "soccer", "Soccer might not be as fun as hockey but it's also pretty fun");
    IndexDocument(writer, "Players", "soccer", "From Sweden we have Zlatan Ibrahimovic and Henrik Larsson. They are the most well known soccer players");
    IndexDocument(writer, "1994", "soccer", "I remember World Cup 1994 when Sweden took the bronze. we had great players. players , bla bla");
    IndexDocument(writer, "BBA-header", "BBA-321type", "Hello BBA");

    writer.Optimize();
    writer.Close();

}
private void IndexDocument(IndexWriter writer, string sHeader, string sType, string sContent)
{
    Document doc = new Document();

    doc.Add(new Field("header", sHeader, Field.Store.YES, Field.Index.TOKENIZED));
    doc.Add(new Field("type", sType, Field.Store.YES, Field.Index.TOKENIZED));
    doc.Add(new Field("content", sContent, Field.Store.YES, Field.Index.TOKENIZED));
    writer.AddDocument(doc);
}

我有几个问题

1）doc.Add（new Field（“header”，sHeader，Field.Store.YES，Field.Index.TOKENIZED））; 这条线的含义是什么？ Field.Index.TOKENIZED 什么是TOKENIZED＆amp;非记号？当我搜索类型参数中指定的关键字时，什么都没有。只是不明白行为

这里是搜索示例，其中我指定了索引为

的关键字

    ListBox1.Items.Clear();
    var searcher = new Lucene.Net.Search.IndexSearcher(MapPath("~/searchlucene/"));
    var oParser = new Lucene.Net.QueryParsers.QueryParser("content", new StandardAnalyzer());
    string sHeader = " OR (header:" + TextBox1.Text + ")";
    string sType = " OR (type:" + TextBox1.Text + ")";
    string sSearchQuery = "(" + TextBox1.Text + sHeader + sType + ")";

    var oHitColl = searcher.Search(oParser.Parse(sSearchQuery));
    for (int i = 0; i < oHitColl.Length(); i++)
    {
        Document oDoc = oHitColl.Doc(i);
        ListBox1.Items.Add(new ListItem(oDoc.Get("header") + oDoc.Get("type") +  oDoc.Get("content")));            
    }

    searcher.Close();

请有人帮我理解，以消除我的困惑。感谢

Answer 1

我刚测试了你的代码，它与Lucene 2.9.4配合使用。

Field.Index.TOKENIZED表示分析器会破坏令牌中的文本，这意味着它可以全文搜索。您可以将UN_TOKENIZED用于您不想分析的字段，例如产品ID。

注意：您应该使用Field.Index.ANALYZED和Field.Index.NOT_ANALYZED作为弃用的TOKENIZED / UN_TOKENIZED对象的替代品。

要查看已分析与否之间的差异，您可以尝试两者并使用Luke检查索引，这可能会让您对其工作原理有所了解。

http://code.google.com/p/luke/

关于关键字搜索和lucene.net c＃

我有几个问题

1 个答案: