/// <summary> /// 删除 /// </summary> /// <param name="id"></param> public void DeleteQueue(string id) { IndexContent indexContent = new IndexContent(); indexContent.id = id; indexContent.LuceneEnumType = LuceneEnumType.Delete; queue.Enqueue(indexContent); }
/// <summary> /// 调用该方法,向队列中添加数据 /// </summary> /// <param name="id"></param> /// <param name="title"></param> /// <param name="content"></param> public void AddOrEditQueue(string id, string img, string title, string jiage, string chuxiaojia) { IndexContent indexContent = new IndexContent(); indexContent.id = id; indexContent.img = img; indexContent.title = title; indexContent.jiage = jiage; indexContent.chuxiaojia = chuxiaojia; indexContent.LuceneEnumType = LuceneEnumType.Add; queue.Enqueue(indexContent); }
private void WriteSearchContent() { string indexPath = @"E:\lucenedir"; //注意和磁盘上文件夹的大小写一致,否则会报错。将创建的分词内容放在该目录下。 FSDirectory directory = FSDirectory.Open(new DirectoryInfo(indexPath), new NativeFSLockFactory()); //指定索引文件(打开索引目录) FS指的是就是FileSystem bool isUpdate = IndexReader.IndexExists(directory); //IndexReader:对索引进行读取的类。该语句的作用:判断索引库文件夹是否存在以及索引特征文件是否存在。 if (isUpdate) { //同时只能有一段代码对索引库进行写操作。当使用IndexWriter打开directory时会自动对索引库文件上锁。 //如果索引目录被锁定(比如索引过程中程序异常退出),则首先解锁(提示一下:如果我现在正在写着已经加锁了,但是还没有写完,这时候又来一个请求,那么不就解锁了吗?这个问题后面会解决) if (IndexWriter.IsLocked(directory)) { IndexWriter.Unlock(directory); } } IndexWriter writer = new IndexWriter(directory, new PanGuAnalyzer(), !isUpdate, Lucene.Net.Index.IndexWriter.MaxFieldLength.UNLIMITED);//向索引库中写索引。这时在这里加锁。 while (queue.Count > 0) { IndexContent indexContent = queue.Dequeue();//出队 writer.DeleteDocuments(new Term("id", indexContent.id.ToString())); if (indexContent.LuceneEnumType == LuceneEnumType.Delete) { continue; } Document document = new Document(); //表示一篇文档。 //string id,string img,string title,string jiage,string chuxiaojia //Field.Store.YES:表示是否存储原值。只有当Field.Store.YES在后面才能用doc.Get("number")取出值来.Field.Index. NOT_ANALYZED:不进行分词保存 document.Add(new Field("id", indexContent.id.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED)); //Field.Index. ANALYZED:进行分词保存:也就是要进行全文的字段要设置分词 保存(因为要进行模糊查询) //Lucene.Net.Documents.Field.TermVector.WITH_POSITIONS_OFFSETS:不仅保存分词还保存分词的距离。 document.Add(new Field("img", indexContent.img, Field.Store.YES, Field.Index.ANALYZED, Lucene.Net.Documents.Field.TermVector.WITH_POSITIONS_OFFSETS)); document.Add(new Field("title", indexContent.title, Field.Store.YES, Field.Index.ANALYZED, Lucene.Net.Documents.Field.TermVector.WITH_POSITIONS_OFFSETS)); document.Add(new Field("jiage", indexContent.jiage, Field.Store.YES, Field.Index.ANALYZED, Lucene.Net.Documents.Field.TermVector.WITH_POSITIONS_OFFSETS)); document.Add(new Field("chuxiaojia", indexContent.chuxiaojia, Field.Store.YES, Field.Index.ANALYZED, Lucene.Net.Documents.Field.TermVector.WITH_POSITIONS_OFFSETS)); writer.AddDocument(document); } writer.Close(); //会自动解锁。 directory.Close(); //不要忘了Close,否则索引结果搜不到 }