Mikel
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Lucene.Net.Index;
using Lucene.Net.Store;
using Lucene.Net.Analysis;
using Lucene.Net.Analysis.Standard;
using Lucene.Net.Search;
using Lucene.Net.Analysis.Cn;
using Lucene.Net.Documents;
using Lucene.Net.QueryParsers;
using System.IO;
namespace Search
{
class Program
{
static void Main(string[] args)
{
//
StandardAnalyzer analyzer=new StandardAnalyzer();
//建立一个内存目录
//Lucene.Net.Store.RAMDirectory ramDir = new Lucene.Net.Store.RAMDirectory();
Lucene.Net.Store.Directory ramDir = FSDirectory.GetDirectory("../index/", true);
//建立一个索引书写器
IndexWriter ramWriter = new IndexWriter(ramDir,analyzer , true);
//ramWriter.SetMaxFieldLength(25000);
////要索引的词，这就相当于一个个的要索引的文件
//string[] words = { "中华人民共和国", "人民共和国", "人民", "共和国" };
////循环数组，创建文档，给文档添加字段，并把文档添加到索引书写器里
//Document doc = null;
//for (int i = 0; i < words.Length; i++)
//{
// doc = new Document();
// doc.Add(new Field("contents", words[i], Field.Store.YES, Field.Index.TOKENIZED));
// ramWriter.AddDocument(doc);
//}
IndexDirectory(ramWriter, new System.IO.FileInfo("../tmp/"));
//索引优化
ramWriter.Optimize();
//TokenStream st = analyzer.TokenStream("contents", new StringReader());
//关闭索引读写器，一定要关哦,按理说应该把上面的代码用try括主，在finally里关闭索引书写器
ramWriter.Close();
//构建一个索引搜索器
IndexSearcher searcher = new IndexSearcher(ramDir);
//用QueryParser.Parse方法实例化一个查询
//Query query = QueryParser.Parse("中华人民", "contents", new ChineseAnalyzer());
QueryParser parser=new QueryParser("contents",analyzer);
Query query = parser.Parse("唐");
//获取搜索结果
Hits hits = searcher.Search(query);
//判断是否有搜索到的结果，当然你也可以遍历结果集并输出
if (hits.Length() != 0)
Console.WriteLine("有");
else
Console.WriteLine("没有");
for (int i = 0; i < hits.Length(); i++)
{
Document doc = hits.Doc(i);
Console.Write(doc.Get("contents"));
//String[] str = hits.Doc(i).GetValues("contents");
//for (int j = 0; j < str.Length; j++)
//{
// Console.Write(str[j]);
//}
//TextReader reader=doc.GetField("contents").ReaderValue();
//Console.WriteLine(reader.ReadLine());
}
searcher.Close();
ramDir.Close();
Console.Read();
}
/// <summary>
/// 生成指定文件或目录的索引
/// </summary>
/// <param name="writer"></param>
/// <param name="file"></param>
public static void IndexDirectory(IndexWriter writer, FileInfo file)
{
//文件路径是否存在
if (System.IO.Directory.Exists(file.FullName))
{
//获得文件列表
String[] files = System.IO.Directory.GetFileSystemEntries(file.FullName);
// an IO error could occur
//文件不存在
if (files != null)
{
//遍历目录文件
for (int i = 0; i < files.Length; i++)
{
IndexDirectory(writer, new FileInfo(files[i])); //这里是一个递归
}
}
}
else if (file.Extension == ".htm")//文件扩展名符合直接创建索引
{
IndexFile(file, writer);
}
}
/// <summary>
/// 创建文件的索引
/// </summary>
/// <param name="file">文件路径</param>
/// <param name="writer">索引编写器</param>
private static void IndexFile(FileInfo file, IndexWriter writer)
{
Console.Out.WriteLine("adding " + file);
try
{
//创建新文档
Document doc = new Document();
//添加Field
doc.Add(new Field("filename", file.FullName,Field.Store.YES,Field.Index.TOKENIZED));
//读取文件内容
string values;
using(StreamReader reader=new StreamReader(file.FullName,Encoding.UTF8))
{
values = reader.ReadToEnd();
}
//创建Field
doc.Add(new Field("contents",values,Field.Store.YES,Field.Index.TOKENIZED));
//写入索引
writer.AddDocument(doc);
}
catch (FileNotFoundException fnfe)
{
}
}
}
}
