Lucene代码备份之分页条件查询

分页条件查询并且获取数据,两种方法,Query和Query2是两种方法另外我用的是最新的lucene.net 2.94版本的写法是通过TopDocs2Data方法取最终数据的,相对以前版本好处是按需取数据,不用一次加载全部using System;using System.Collections.Generic;using System.Linq;using System.Text;using XydSoft.Article.Entity;using Lucene.Net.Search;using Lucene.Net.Analysis;using Lucene.Net.QueryParsers;using Lucene.Net.Analysis.Standard;using Lucene.Net.Index;using XydSoft.Article.Common;using System.IO;using Lucene.Net.Documents; namespace XydSoft.Article.Luncene{    /// <summary>    /// 查询类    /// 重要    /// </summary>    public class QueryIndexManager    {         /// <summary>        /// 分页获取列表数据        /// </summary>        /// <param name="tag"></param>        /// <param name="pageIndex"></param>        /// <param name="pageSize"></param>        /// <param name="totalRec"></param>        /// <returns></returns>        public static List<ArticleInfo> Query(string tag, int pageIndex, int pageSize, out int totalRec)        {            QueryParser parser = new QueryParser("Title", Common.CurrentAnalyzer);            Query query = parser.Parse(tag);            Sort sort = new Sort(new SortField("AddDate", SortField.DOC, false));              TopDocs topDocs = Common.GenerateSearcher().Search(query, (Filter)null, pageIndex * pageSize, sort);            totalRec = topDocs.TotalHits;             if (pageIndex == 1)                return TopDocs2Data(topDocs.ScoreDocs);            return TopDocs2Data(topDocs.ScoreDocs, pageIndex, pageSize, totalRec);        }         private static List<DataSourceInfo> Query2(string tag, int pageIndex, int pageSize, out int totalRec)        {            Query query = new WildcardQuery(new Term("Title", "*" + tag + "*"));            Sort sort = new Sort(new SortField("AddDate", SortField.AUTO, false));             IndexSearcher searcher = new IndexSearcher(XydSoft.Article.Common.Const.LuceneIndexPath, true);            Hits hits = searcher.Search(query, sort);            totalRec = hits.Length();             int start = (pageIndex - 1) * pageSize;            int end = pageIndex * pageSize;            if (end > totalRec)                end = totalRec;            List<DataSourceInfo> list = new List<DataSourceInfo>();            for (int index = start; index < end; index++)            {                DataSourceInfo dataSourceInfo = new DataSourceInfo();                dataSourceInfo.Title = hits.Doc(index).Get("Title");                dataSourceInfo.ID = hits.Doc(index).Get("ID").ToInteger();                dataSourceInfo.AddDate = hits.Doc(index).Get("AddDate").ToDateTime();                list.Add(dataSourceInfo);            }            return list;        }          #region 获取最终的数据        /// <summary>        /// 获取最终的数据        /// </summary>        /// <param name="scoreDoc"></param>        /// <param name="pageIndex"></param>        /// <param name="pageSize"></param>        /// <param name="totalRec"></param>        /// <returns></returns>        private static List<ArticleInfo> TopDocs2Data(ScoreDoc[] scoreDoc, int pageIndex, int pageSize, int totalRec)        {            int start = (pageIndex - 1) * pageSize;            int end = pageIndex * pageSize;            if (end > totalRec)                end = totalRec;            List<ArticleInfo> list = new List<ArticleInfo>();            for (int index = start; index < end; index++)            {                Document doc = Common.GenerateSearcher().Doc(scoreDoc[index].doc);                ArticleInfo articleInfo = new ArticleInfo();                articleInfo.Title = doc.Get("Title");                articleInfo.ID = doc.Get("ID").ToInteger();                articleInfo.AddDate = doc.Get("AddDate").ToDateTime();                list.Add(articleInfo);            }            return list;        }         /// <summary>        /// 获取最终的数据        /// </summary>        /// <param name="docs"></param>        /// <returns></returns>        private static List<ArticleInfo> TopDocs2Data(ScoreDoc[] docs)        {             if (docs == null || docs.Length == 0)                return null;            List<ArticleInfo> list = new List<ArticleInfo>();            foreach (ScoreDoc sd in docs)            {                Document doc = Common.GenerateSearcher().Doc(sd.doc);                ArticleInfo articleInfo = new ArticleInfo();                articleInfo.Title = doc.Get("Title");                articleInfo.ID = doc.Get("ID").ToInteger();                articleInfo.AddDate = doc.Get("AddDate").ToDateTime();                list.Add(articleInfo);            }            return list;         }         #endregion     }}