lucene通配符查询:WildcardQuery

 

using System;   
using System.Collections.Generic;   
using System.Text;   
using Lucene.Net.Index;   
using Lucene.Net.Store;   
using Lucene.Net.Documents;   
using Lucene.Net.Analysis.Standard;   
using Lucene.Net.Search;   
   
   
public class WildcardQueryTest   
{   
    RAMDirectory directory = new RAMDirectory();   
   
    public Document getDoc(String type, String content)   
    {   
        Document doc = new Document();   
        doc.Add(new Field(type, content, Field.Store.YES, Field.Index.TOKENIZED));   
        return doc;   
    }   
   
    public void makeIndex()   
    {   
   
            IndexWriter indexWriter = new IndexWriter(directory, new StandardAnalyzer(), true);   
            indexWriter.AddDocument(getDoc("content", "word"));   
            indexWriter.AddDocument(getDoc("content", "work"));   
            indexWriter.AddDocument(getDoc("content", "workman"));   
            indexWriter.AddDocument(getDoc("content", "woe"));   
            indexWriter.AddDocument(getDoc("content", "wow"));   
            indexWriter.AddDocument(getDoc("content", "wolf"));   
            indexWriter.AddDocument(getDoc("content", "woman"));   
            indexWriter.AddDocument(getDoc("content", "world"));   
            indexWriter.AddDocument(getDoc("content", "sword"));   
            indexWriter.AddDocument(getDoc("content", "ford"));   
            indexWriter.AddDocument(getDoc("content", "good work"));   
            indexWriter.Close();   
    }   
   
    /**  
     * 通配符查询 ?表示单一字符 *表示0-n个字符  
     */   
    public void search(String key){   
        try {   
            IndexSearcher indexSearcher = new IndexSearcher(directory);   
            WildcardQuery query = new WildcardQuery(new Term("content", key));   
            Hits hits = indexSearcher.Search(query);   
            for (int i = 0; i < hits.Length(); i++) {   
                Console.WriteLine("docid:" + hits.Id(i) + "    content:"   
                        + hits.Doc(i).Get("content") + "    score:" + hits.Score(i));   
            }   
            directory.Close();   
        }catch (Exception e) {   
               
        }   
    }   
   
    static void Main(string[] args)   
    {   
        WildcardQueryTest query = new WildcardQueryTest();   
        query.makeIndex();   
        query.search("?o*");   
        Console.ReadLine();   
    }   
   
}