lucene 过滤结果

 

 

 1 package cn.itcast.h_filter;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 
 6 import org.apache.lucene.document.Document;
 7 import org.apache.lucene.queryParser.MultiFieldQueryParser;
 8 import org.apache.lucene.queryParser.QueryParser;
 9 import org.apache.lucene.search.Filter;
10 import org.apache.lucene.search.IndexSearcher;
11 import org.apache.lucene.search.NumericRangeFilter;
12 import org.apache.lucene.search.Query;
13 import org.apache.lucene.search.Sort;
14 import org.apache.lucene.search.SortField;
15 import org.apache.lucene.search.TopDocs;
16 import org.apache.lucene.util.Version;
17 import org.junit.Test;
18 
19 import cn.itcast._domain.Article;
20 import cn.itcast._util.ArticleDocumentUtils;
21 import cn.itcast._util.LuceneUtils;
22 
23 public class TestApp {
24 
25     // 搜索
26     @Test
27     public void testSearch() throws Exception {
28         // 准备查询条件
29         String queryString = "lucene";
30 
31         // 执行搜索
32         List<Article> list = new ArrayList<Article>();
33 
34         // 1，把查询字符串转为Query对象（从title和content中查询）
35         QueryParser queryParser = new MultiFieldQueryParser(Version.LUCENE_30, new String[] { "title", "content" }, LuceneUtils.getAnalyzer());
36         Query query = queryParser.parse(queryString);
37 
38         // 2，执行查询，得到中间结果
39         IndexSearcher indexSearcher = new IndexSearcher(LuceneUtils.getDirectory()); // 指定所用的索引库
40         // TopDocs topDocs = indexSearcher.search(query, 100); // 最多返回前n条结果
41 
42         // ========================================================================================== 【创建高亮器】
43         // indexSearcher.search(query, n);
44         // indexSearcher.search(query, filter, n);
45         // indexSearcher.search(query, filter, n, sort);
46 
47         Filter filter = NumericRangeFilter.newIntRange("id", 5, 15, false, true); // null表示没有过滤条件   选择 (5,15] 之间的过滤的数据，后面的boolean判断 括号开闭用处的
48         TopDocs topDocs = indexSearcher.search(query, filter, 100);
49 
50         // ==========================================================================================
51 
52         // 3，处理结果
53         for (int i = 0; i < topDocs.scoreDocs.length; i++) {
54             // 根据编号拿到Document数据
55             int docId = topDocs.scoreDocs[i].doc; // Document的内部编号
56             Document doc = indexSearcher.doc(docId);
57             // 把Document转为Article
58             Article article = ArticleDocumentUtils.documentToArticle(doc);
59             list.add(article);
60         }
61         indexSearcher.close();
62 
63         // 显示结果
64         System.out.println("总结果数：" + list.size());
65         for (Article a : list) {
66             System.out.println("------------------------------");
67             System.out.println("id = " + a.getId());
68             System.out.println("title = " + a.getTitle());
69             System.out.println("content = " + a.getContent());
70         }
71     }
72 }