lucene入門查詢索引——（三）

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1.使用者介面(lucene不提供)

 

 

2.建立查詢

 

3.執行查詢

 

 

4.渲染結果:

 

5.過程分析

根據關鍵字查詢索引庫中的內容：

1）  建立IndexSearcher對象

2）  建立QueryParser對象

3）  建立Query對象來封裝關鍵字

4）  用IndexSearcher對象去索引庫中查詢合格前100條記錄，不足100條記錄的以實際為準

5）  擷取合格編號

6）  用indexSearcher對象去索引庫中查詢編號對應的Document對象

7）  將Document對象中的所有屬性取出，再封裝回JavaBean對象中去，並加入到集合中儲存，以備將之用

 

 IndexSearcher對象搜尋方法:

 

 6.代碼實現:

 1     // 搜尋索引 2     @Test 3     public void testSearch() throws Exception { 4         // 第一步：建立一個Directory對象，也就是索引庫存放的位置。 5         Directory directory = FSDirectory.open(new File("E:\\lucene&solr\\index"));// 磁碟 6         // 第二步：建立一個indexReader對象，需要指定Directory對象。 7         IndexReader indexReader = DirectoryReader.open(directory); 8         // 第三步：建立一個indexsearcher對象，需要指定IndexReader對象 9         IndexSearcher indexSearcher = new IndexSearcher(indexReader);10         // 第四步：建立一個TermQuery對象，指定查詢的域和查詢的關鍵詞。11         Query query = new TermQuery(new Term("fileName", "java"));12         // 第五步：執行查詢。13         TopDocs topDocs = indexSearcher.search(query, 10);14         // 第六步：返回查詢結果。遍曆查詢結果並輸出。15         ScoreDoc[] scoreDocs = topDocs.scoreDocs;16         for (ScoreDoc scoreDoc : scoreDocs) {17             int doc = scoreDoc.doc;18             Document document = indexSearcher.doc(doc);19             // 檔案名稱20             String fileName = document.get("fileName");21             System.out.println(fileName);22             // 檔案內容23             String fileContent = document.get("fileContent");24             System.out.println(fileContent);25             // 檔案大小26             String fileSize = document.get("fileSize");27             System.out.println(fileSize);28             // 檔案路徑29             String filePath = document.get("filePath");30             System.out.println(filePath);31             System.out.println("------------");32         }33         // 第七步：關閉IndexReader對象34         indexReader.close();35 36     }

 

 

結果:

java struts.txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene1\searchfiles\java struts.txt------------java struts - .txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene&solr\searchfiles\java struts - .txt------------java struts.txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene&solr\searchfiles\java struts.txt------------java struts  springmvc.txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene&solr\searchfiles\java struts  springmvc.txt------------java struts spring.txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene&solr\searchfiles\java struts spring.txt------------

 

 將上面的第五步的

 TopDocs topDocs = indexSearcher.search(query, 10); 改為
 TopDocs topDocs = indexSearcher.search(query, 2);


結果:只輸出查到的兩條記錄

java struts.txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene1\searchfiles\java struts.txt------------java struts - .txt think smiling is as important as sunshine. Smiling is like sunshine because it can make people happy and have a good day. If you aren??t happy, you can smile, and then you will feel happy. Someone may say, ??But I don??t feel happy.?? Then I would say, ??Please smile as you do when you are happy or play wit309E:\lucene&solr\searchfiles\java struts - .txt------------

 

lucene入門查詢索引——（三）