/// <summary>
/// 搜索（返回所有）
/// </summary>
/// <param name="indexPath">返回结果数据类型</param>
/// <param name="query">Query</param>
/// <param name="sort">排序</param>
/// <returns></returns>
public static List <T> Search <T>(string indexPath, Query query, Sort sort) where T : BaseIndexModel
{
if (string.IsNullOrWhiteSpace(indexPath))
{
return(null);
}
if (null == query)
{
return(null);
}
FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexPath), new NoLockFactory());
if (null == directory)
{
return(null);
}
IndexReader reader = IndexReader.Open(directory, true);
IndexSearcher searcher = new IndexSearcher(reader);
ScoreDoc[] docs = null;
if (null == sort)
{
docs = searcher.Search(query, 0).ScoreDocs;
}
else
{
docs = searcher.Search(query, null, 0, sort).ScoreDocs;
}
List <T> list = new List <T>();
foreach (var scoreDoc in docs)
{
Document doc = searcher.Doc(scoreDoc.Doc);
var data = new IndexFactory(doc).Result as T;
if (null != data)
{
list.Add(data);
}
}
return(list);
}
/// <summary>
/// 多索引文件联合查询搜索（带分页）
/// </summary>
/// <typeparam name="T">返回结果数据类型</typeparam>
/// <param name="indexPaths">索引文件路径集合</param>
/// <param name="query">Query</param>
/// <param name="sort">排序</param>
/// <param name="pageIndex">当前搜索页</param>
/// <param name="pageSize">每页显示数</param>
/// <param name="count">总搜索结果数</param>
/// <returns></returns>
public static List <T> Search <T>(string[] indexPaths, Query query, Sort sort, int pageIndex, int pageSize, out int count) where T : BaseIndexModel
{
count = 0;
if (null == query)
{
return(null);
}
if (pageIndex < 1)
{
pageIndex = 1;
}
if (pageSize < 1)
{
pageSize = 1;
}
//起始搜索位置
int start = (pageIndex - 1) * pageSize;
if (null == indexPaths || indexPaths.Length < 1)
{
return(null);
}
List <IndexSearcher> searchers = new List <IndexSearcher>();
foreach (var indexPath in indexPaths)
{
if (string.IsNullOrWhiteSpace(indexPath))
{
continue;
}
//打开索引文件
FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexPath), new NoLockFactory());
if (null == directory)
{
continue;
}
//检测索引文件是否存在
bool isExist = IndexReader.IndexExists(directory);
if (!isExist)
{
continue;
}
//创建一个只读的索引文件读取实例
IndexReader reader = IndexReader.Open(directory, true);
//实例化IndexSearcher搜索器
IndexSearcher searcher = new IndexSearcher(reader);
searchers.Add(searcher);
}
if (searchers.Count < 1)
{
return(null);
}
MultiSearcher multiSearcher = new MultiSearcher(searchers.ToArray());
//Collector
TopFieldCollector results = TopFieldCollector.Create(sort, start + pageSize, false, false, false, false);
//搜索
multiSearcher.Search(query, results);
//总命中率（精算）
count = results.TotalHits;
//获取当前页文档
var docs = results.TopDocs(start, pageSize).ScoreDocs;
//定义一个结果返回变量
List <T> list = new List <T>();
//遍历当前页文档，并转换为需要的结果类型
foreach (var scoreDoc in docs)
{
Document doc = multiSearcher.Doc(scoreDoc.Doc);
var data = new IndexFactory(doc).Result as T;
if (null != data)
{
list.Add(data);
}
}
return(list);
}
