lucene 实现分页

 1 package com.kite.dispage;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 
 6 import org.apache.lucene.document.Document;
 7 import org.apache.lucene.index.IndexWriter;
 8 import org.apache.lucene.index.IndexWriter.MaxFieldLength;
 9 import org.apache.lucene.queryParser.MultiFieldQueryParser;
10 import org.apache.lucene.queryParser.QueryParser;
11 import org.apache.lucene.search.IndexSearcher;
12 import org.apache.lucene.search.Query;
13 import org.apache.lucene.search.ScoreDoc;
14 import org.apache.lucene.search.TopDocs;
15 import org.apache.lucene.util.Version;
16 import org.junit.Test;
17 
18 import com.kite.bean.Article;
19 import com.kite.luncene.utils.DocumentUtils;
20 import com.kite.luncene.utils.LunceneUtils;
21 
22 /**
23  * 分页
24  * @author admin
25  *
26  */
27 public class DisPageTest
28 {
29     @Test
30     public void testCreateIndexBeath() throws Exception
31     {
32         IndexWriter indexWriter = new IndexWriter(LunceneUtils.directory, LunceneUtils.analyzer, MaxFieldLength.LIMITED);
33         for(int i = 0; i < 1000; i++)
34         {
35             
36             Article article = new Article();
37             article.setId(1L + i);
38             article.setTitle("luncenes是一个好难写的东西");
39             article.setContent("百度，谷歌是很好的搜索引擎");
40             //通过工具类转换成document
41             Document document = DocumentUtils.articleToDocument(article);
42             indexWriter.addDocument(document);
43         }
44         
45         indexWriter.close();
46     }
47     
48     /**
49      * 
50      * @param firstResult
51      *    当前页的第一行在集合中的位置
52      * @param maxResult
53      *    每页显示的最大的行数
54      * @throws Exception
55      */
56     public void testSearchIndexDispage(int firstResult,int maxResult) throws Exception
57     {
58         IndexSearcher indexSearcher = new IndexSearcher(LunceneUtils.directory);
59         QueryParser queryParser = new MultiFieldQueryParser(Version.LUCENE_30, new String[]{"title","content"}, LunceneUtils.analyzer);
60         Query query = queryParser.parse("luncenes");
61         //查询的是起点位置到一页显示多少行
62         TopDocs topDocs = indexSearcher.search(query,firstResult+maxResult);
63         //返回
64         int count = Math.min(topDocs.totalHits, firstResult+maxResult);
65         ScoreDoc[] scoreDocs = topDocs.scoreDocs;
66         List<Article> articleList = new ArrayList<Article>();
67         for(int i=firstResult;i<count;i++){
68             Document document =  indexSearcher.doc(scoreDocs[i].doc);
69             Article article = DocumentUtils.documentToArticle(document);
70             articleList.add(article);
71         }
72         
73         for(Article article:articleList){
74             System.out.println(article.getId());
75             System.out.println(article.getTitle());
76             System.out.println(article.getContent());
77         }
78     }
79     /**
80      * 分页测试
81      */
82     @Test
83     public void testDisPage() throws Exception
84     {
85         this.testSearchIndexDispage(500,100);
86     }
87 }