ASP.NET基于Ajax+Lucene构建搜索引擎的设计和实现

由于篇幅限制，我将提供一个核心函数的示例，该函数展示了如何使用Lucene.NET创建索引并进行搜索。

using System;
using System.Collections.Generic;
using System.Linq;
using Lucene.Net.Analysis;
using Lucene.Net.Documents;
using Lucene.Net.Index;
using Lucene.Net.QueryParsers;
using Lucene.Net.Search;
using Lucene.Net.Store;
 
public class LuceneSearchEngine
{
    private Directory directory;
    private IndexSearcher searcher;
 
    public LuceneSearchEngine(string indexPath)
    {
        directory = FSDirectory.Open(indexPath);
        searcher = new IndexSearcher(IndexReader.Open(directory));
    }
 
    public void CreateIndex(IEnumerable<string> documents, string fieldName)
    {
        Analyzer analyzer = new StandardAnalyzer();
        IndexWriter writer = new IndexWriter(directory, analyzer);
 
        foreach (var document in documents)
        {
            Document doc = new Document();
            doc.Add(new Field(fieldName, document, Field.Store.YES, Field.Index.ANALYZED));
            writer.AddDocument(doc);
        }
 
        writer.Optimize();
        writer.Close();
    }
 
    public List<string> Search(string queryString)
    {
        QueryParser parser = new QueryParser(Version.LUCENE_30, "content", new StandardAnalyzer());
        Query query = parser.Parse(queryString);
 
        TopDocs topDocs = searcher.Search(query, 10);
        ScoreDoc[] scoreDocs = topDocs.ScoreDocs;
 
        List<string> results = new List<string>();
        foreach (ScoreDoc scoreDoc in scoreDocs)
        {
            Document doc = searcher.Doc(scoreDoc.Doc);
            results.Add(doc.GetField("content").StringValue);
        }
 
        return results;
    }
}

这段代码展示了如何使用Lucene.NET创建和执行搜索。CreateIndex方法接受一系列文档和字段名称，对每个文档创建一个Lucene文档并索引它。Search方法接受一个查询字符串，解析它，并返回与查询匹配的文档列表。

请注意，这只是一个简化的示例，实际应用中你需要处理例如分析器配置、异常处理、索引维护等更多细节。