请教关于Lucene.net的问题
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悬赏园豆：100
[待解决问题]
请教关于Lucene.net的问题
创建索引
private static void CreateIndex()
{
string path = @"d:\search\";
IndexWriter writer = new IndexWriter(path, new StandardAnalyzer());
Document doc = new Document();
doc.Add(new Field("title", "AC米兰队", Field.Store.YES, Field.Index.TOKENIZED));
doc.Add(new Field("title", "曼彻斯特联队", Field.Store.YES, Field.Index.TOKENIZED));
doc.Add(new Field("title", "曼彻斯特城队", Field.Store.YES, Field.Index.TOKENIZED));
doc.Add(new Field("title", "国际米兰队", Field.Store.YES, Field.Index.TOKENIZED));
doc.Add(new Field("title", "尤文图斯队", Field.Store.YES, Field.Index.TOKENIZED));
writer.AddDocument(doc);
writer.Optimize();
writer.Close();
}
搜索
private static void Search(string words)
{
Console.WriteLine(words);
string path = @"d:\search\";
IndexSearcher searcher = new IndexSearcher(path);
Query query = new QueryParser("title", new StandardAnalyzer()).Parse(words);
Hits hits = searcher.Search(query);
Console.WriteLine(hits.Length());
for (int i = 0; i < hits.Length(); i++ )
System.Console.WriteLine(hits.Doc(i).GetField("title").StringValue());
searcher.Close();
}
现在我运行Search("城")
hits.Length() = 1；
只搜索出来了“AC米兰队”
请问是哪里出了问题，请指教，谢谢。
所有回答(4)
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Term pre2 = new Term("title", words);
PrefixQuery query3 = new PrefixQuery(pre2);
试试 这个，你用的是模糊查询
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你对Lucene的Document理解有误
Document相当于数据库中的一条记录，Field相当于数据库表中的一个字段属性
所以是你创建索引的地方出问题了，应该这样：
IndexWriter writer = new IndexWriter(path, new StandardAnalyzer()); string[] strArray = new string[] { "AC米兰队", "曼彻斯特联队", "曼彻斯特城队", "国际米兰队", "尤文图斯队" }; for (int i = 0; i < strArray.Length; i++) { Document doc = new Document(); doc.Add(new Field("title", strArray[i], Field.Store.YES, Field.Index.TOKENIZED)); writer.AddDocument(doc); } writer.Optimize(); writer.Close();
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不知所云，本就没有你所說的東西。
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我帮你调试了一下，这样写，不过我的Lucene.net的版本比你高：
StandardAnalyzer standardAnalyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_29);
FSDirectory fsDirectory = FSDirectory.Open(new DirectoryInfo(@"d:\search\"), new NoLockFactory());
IndexWriter indexWriter = new IndexWriter(fsDirectory, standardAnalyzer, true, IndexWriter.MaxFieldLength.LIMITED);
Document document = new Document();
document.Add(new Field("title", "AC米兰城队", Field.Store.YES, Field.Index.ANALYZED));
indexWriter.AddDocument(document);
document = new Document();
document.Add(new Field("title", "曼彻斯特联城队", Field.Store.YES, Field.Index.ANALYZED));
indexWriter.AddDocument(document);
document = new Document();
document.Add(new Field("title", "曼彻斯特城队", Field.Store.YES, Field.Index.ANALYZED));
indexWriter.AddDocument(document);
document = new Document();
document.Add(new Field("title", "国际米兰城队", Field.Store.YES, Field.Index.ANALYZED));
indexWriter.AddDocument(document);
document = new Document();
document.Add(new Field("title", "尤文图斯城队", Field.Store.YES, Field.Index.ANALYZED));
indexWriter.AddDocument(document);
indexWriter.Optimize();
indexWriter.Close();
IndexSearcher indexSearcher = new IndexSearcher(fsDirectory, true);
Query query = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "title", standardAnalyzer).Parse("城");
TopDocs TopDocs = indexSearcher.Search(query, 1);
Hits hits = indexSearcher.Search(query);
System.Console.WriteLine(hits.Doc(0).GetField("title").StringValue());
System.Console.WriteLine(hits.Doc(1).GetField("title").StringValue());
System.Console.WriteLine(hits.Doc(2).GetField("title").StringValue());
System.Console.WriteLine(hits.Doc(3).GetField("title").StringValue());
System.Console.WriteLine(hits.Doc(4).GetField("title").StringValue());
你的程序问题：
（1）只有一个带“城”的
（2）Document需要像我这样，每天加一个Field都需要AddDocument
2.9版本的Lucene.Net这么干：
IndexSearcher indexSearcher = new IndexSearcher(fsDirectory, true);
Query query = new QueryParser(Lucene.Net.Util.Version.LUCENE_29, "title", standardAnalyzer).Parse("城");
TopDocs topDocs = indexSearcher.Search(query, 10);
for (int i = 0;i < topDocs.TotalHits;++i)
{
Document temp = indexSearcher.Doc(topDocs.ScoreDocs[i].doc);
Console.WriteLine(temp.GetField("title").StringValue());
}
