private static void CreateIndex(List <SellOffer> list)
{
string indexpath = ConfigurationManager.AppSettings["Indexpath"];
FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexpath), new NativeFSLockFactory());
//IndexReader:对索引库进行读取的类
bool isExist = IndexReader.IndexExists(directory); //是否存在索引库文件夹以及索引库特征文件
if (isExist)
{
//如果索引目录被锁定（比如索引过程中程序异常退出或另一进程在操作索引库），则解锁
//Q:存在问题 如果一个用户正在对索引库写操作 此时是上锁的 而另一个用户过来操作时 将锁解开了 于是产生冲突 --解决方法后续
if (IndexWriter.IsLocked(directory))
{
IndexWriter.Unlock(directory);
}
}
IndexWriter writer = new IndexWriter(directory, new PanGuAnalyzer(), !isExist, IndexWriter.MaxFieldLength.UNLIMITED);
ISellOfferDetail selldetailBll = new SellOfferDetailService();
try
{
foreach (var pitem in list)
{
SellOfferDetail offerdetail = new SellOfferDetail();
offerdetail = selldetailBll.SearchById(pitem.Id);
Document document = new Document();
Field id = new Field("id", pitem.Id.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED);
Field title = new Field("title", pitem.Title, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
title.SetBoost(1.0f);
Field keywords = new Field("keywords", pitem.Keywords, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
keywords.SetBoost(0.7f);
Field detail = new Field("detail", offerdetail.Detail, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
Field sysattr = new Field("sysattr", pitem.SysAttr, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
sysattr.SetBoost(0.4f);
Field cusattr = new Field("cusattr", pitem.CusAttr, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS);
cusattr.SetBoost(0.1f);
document.Add(id);
document.Add(title);
document.Add(keywords);
document.Add(detail);
document.Add(sysattr);
document.Add(cusattr);
writer.AddDocument(document); //文档写入索引库
}
writer.Optimize();
writer.Close(); //会自动解锁
directory.Close(); //不要忘了Close，否则索引结果搜不到
}
catch (Exception ex)
{
Utility.writelog("创建索引出问题:" + ex + "");
}
}
public SellOfferDetail SearchById(int id)
{
SellOfferDetail detail = new SellOfferDetail();
DataTable dt = new DataTable();
dt = SqlHelper.Search(@"select * from Products_SellOffer_Detail where SellOfferId=@id", new SqlParameter[] { new SqlParameter("@id", id) });
if (dt.Rows.Count == 1)
{
detail.Id = (int)dt.Rows[0]["Id"];
detail.SellOfferId = (int)dt.Rows[0]["SellOfferId"];
detail.Detail = dt.Rows[0]["Detail"].ToString();
}
return(detail);
}
