/// <summary>
/// 绑定数据
/// 1.读取分页信息（分页控件）
/// 2.处理lucen返回的Hits结果集
/// 3.绑定数据控件
/// </summary>
public void BindData(string keyWords)
{
// 1.分页信息
int pageSize = this.AspNetPageControls.PageSize = 20;
int currentPage = this.AspNetPageControls.CurrentPageIndex;
if (!Directory.Exists(Server.MapPath("ArticleIndex")))
{
this.SetArticleIndex();
}
DateTime startTime = DateTime.Now;
int totalCount = this.GetHitsResultBy(Server.MapPath("ArticleIndex"), keyWords, currentPage, pageSize);
double timeSeconds = (DateTime.Now - startTime).TotalSeconds;
this.AspNetPageControls.RecordCount = totalCount;
this.LiMessage.Text = string.Format("搜索“ {0} ” 约 {1} 个结果,", keyWords, totalCount);
// 3.绑定数据控件
this.RepArticleList.DataSource = ArticleList;
this.RepArticleList.DataBind();
}
/// <summary>
/// 查询LucenIndex
/// 1.创建索引查询器
/// 2.创建查询分析器
/// 3.使用查询分析器分析条件
/// 4.设置排序规则
/// 5.使用查询器把查询分析条件（即3得到结果）和排序规则作为参数，进行查询
/// </summary>
/// <param name="path">绝对路径Server.MapPath("ArticleIndex")</param>
/// <param name="keyWord">关键词</param>
/// <returns>Hits</returns>
public int GetHitsResultBy(string path, string keyWord, int currPage, int pageSize)
{
#region /* 注释代码 */
// Hits hits = null;
//// 设置对哪个文件（即索引）进行搜索
//IndexSearcher indexSearch = new IndexSearcher(path);
//// 具体对哪个索引进行搜索，使用哪种分析器
////QueryParser multiQuery = new QueryParser("Content", new ChineseAnalyzer());
//// 对那个字段索引进行索引
//MultiFieldQueryParser multiQuery = new MultiFieldQueryParser(new string[] { "Title", "Content" }, new ChineseAnalyzer());
//// 将参数传入到索引解析器中
//Query query = multiQuery.Parse(keyWord);
//// 模糊查询*代表通配所有？刚表式通配单个字符
////WildcardQuery wildcarQ = new WildcardQuery(new Term("contents"), keyWord + "??");
//// 按照什么要求排序为true是降序 false是升序
//Sort sort = new Sort(new SortField("Title", SortField.DOC, true));
//// hit是搜索结果记录集，不过是Luence自己的格式，需要格式化成标准输出
#endregion
int result = 0;
Hits hits = null; // 设置对哪个文件（即索引）进行搜索
IndexSearcher indexSearch = new IndexSearcher(path);
try
{
ChineseAnalyzer chinesAnalyer = new ChineseAnalyzer();
MultiFieldQueryParser multiQuery = new MultiFieldQueryParser(new string[] { "Title", "Content" }, chinesAnalyer);
// 将参数传入到索引解析器中
Query query = multiQuery.Parse(keyWord);
// 按照什么要求排序为true是降序 false是升序
Sort sort = new Sort(new SortField("Title", SortField.SCORE, false));
hits = indexSearch.Search(query, sort);
result = hits.Length();
// 分解词
TokenStream tokenStearm = chinesAnalyer.TokenStream("", new StringReader(keyWord));
Lucene.Net.Analysis.Token token;
List<string> keyWordList = new List<string>();
while ((token = tokenStearm.Next()) != null) { keyWordList.Add(token.TermText()); }
// 2.处理lucen返回的Hits结果集
Article article = null;
int pageCount = (result < pageSize) ? result : pageSize;
if (hits != null && hits.Length() > 0)
{
int stratIndex = (currPage - 1) * pageSize;
for (int i = (stratIndex <= 0) ? stratIndex : (stratIndex - 1); i < pageCount; i++)
{
article = new Article();
Document doc = hits.Doc(i);
article.FromSiteUrl = doc.Get("Url").ToString();
article.Title = SimpleHighLighter(doc.Get("Title").ToString(), keyWordList, "<font style='color:Red'>{0}</font>", 266); ;
article.Content = SimpleHighLighter(doc.Get("Content").ToString(), keyWordList, "<font style='color:Red'>{0}</font>", 266);
article.UptoTime = doc.Get("Updated");
ArticleList.Add(article);
}
}
indexSearch.Close();
}catch (Exception){
hits = null;
indexSearch.Close();
return 0;
}
return result;
}
/// <summary>
/// 创建索引
/// </summary>
private void SetArticleIndex()
{
#region /* 注释创建索引 */
//IndexWriter writer = new IndexWriter(path, new ChineseAnalyzer(), true);
//foreach (Article article in list)
//{
// Document doc = new Document();
// // Field.Store.Yes 是存储索引值 Tokenized是对内容进行分词 UN_Tokenized不分词
// // 如果内容较多，可以对内容不进行存储，但可对他分词，将一些url信息附加到相关信息上去
// doc.Add(SetField("url", article.Url, Field.Store.YES, Field.Index.UN_TOKENIZED));
// doc.Add(SetField("title", article.Title, Field.Store.YES, Field.Index.TOKENIZED));
// doc.Add(SetField("content", article.Content, Field.Store.YES, Field.Index.TOKENIZED));
// writer.AddDocument(doc);
//}
//writer.Optimize();
//writer.Close();
#endregion
List<Article> list = HelperArticle.GetAllArticle(TypeOfArticle.LinkArticle);
this.SetLuceneIndex<Article>(Server.MapPath("ArticleIndex"), new ChineseAnalyzer(), list, true, "Url", "Title", "Content", "Updated");
}
/// <summary>
/// 通用创建索引
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="path">绝对路径Server.MapPath("LuceneArticleIndex")</param>
/// <param name="analyzer">分词</param>
/// <param name="tList">需要分词数据</param>
/// <param name="isCreateOrAppend">true创建 false追加</param>
/// <param name="colunms">需要索引列名</param>
private void SetLuceneIndex<T>(string path, Analyzer analyzer, List<T> tList, bool isCreateOrAppend, params string[] colunms)
{
IndexWriter writer = new IndexWriter(path, analyzer, isCreateOrAppend);
try
{
foreach (T type in tList)
{
Document doc = new Document();
foreach (string colunm in colunms)
{
object obj = type.GetType().GetProperty(colunm).GetValue(type, null);
string content = string.Empty;
if ("Updated".Equals(colunm))
content = ((DateTime)obj).ToString("yyyy-MM-dd");
else
content = We7Helper.RemoveHtml(obj.ToString()).Replace(" ", "");
// 索引数据
if ("title".Equals(colunm.ToLower()) || "content".Equals(colunm.ToLower()))
doc.Add(SetField(colunm, content, Field.Store.YES, Field.Index.TOKENIZED));
else
doc.Add(SetField(colunm, content, Field.Store.YES, Field.Index.UN_TOKENIZED));
}
writer.AddDocument(doc);
}
writer.Optimize();
writer.Close();
}
catch (Exception)
{
writer.Close();
}
}
/// <summary>
/// 替换高亮字符
/// </summary>
/// <param name="body">文本</param>
/// <param name="keyWords">关键字</param>
/// <param name="highLighter">高亮信息（使用占位符）如：html标签 {0} html结束标签</param>
/// <param name="Max_Length">字符长度</param>
/// <returns>输出信息</returns>
public string SimpleHighLighter(string body, List<string> keyWords, string highLighter, int Max_Length)
{
body = body.Replace(" ", "");
body = body.Substring(0, (Max_Length < body.Length) ? Max_Length : body.Length);
StringBuilder sbBody = new StringBuilder(body);
foreach (string objkeyWord in keyWords)
{
sbBody.Replace(objkeyWord, string.Format(highLighter, objkeyWord));
}
sbBody.Append("...");
return sbBody.ToString();
}
