lucene学习之二Numeric搜索

techdo

于 2011-11-30 15:55:32 发布

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分类专栏：搜索引擎文章标签： lucene exception query date class

本文链接：https://blog.youkuaiyun.com/techdo/article/details/7027555

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本文讨论了如何使用Elasticsearch进行数值范围查询，并提供了两种查询方式的实现：包含边界和排除边界。

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public class NumericRangeQueryTest extends TestCase {
  public void testInclusive() throws Exception {
    Directory dir = TestUtil.getBookIndexDirectory();
    IndexSearcher searcher = new IndexSearcher(dir);
    // pub date of TTC was September 2006
    NumericRangeQuery query = NumericRangeQuery.newIntRange("pubmonth",
                                                            200605,
                                                            200609,
                                                            true,
                                                            true);

    TopDocs matches = searcher.search(query, 10);
    /*
    for(int i=0;i<matches.totalHits;i++) {
      System.out.println("match " + i + ": " + searcher.doc(matches.scoreDocs[i].doc).get("author"));
    }
    */
    assertEquals(1, matches.totalHits);
    searcher.close();
    dir.close();
  }

  public void testExclusive() throws Exception {
    Directory dir = TestUtil.getBookIndexDirectory();
    IndexSearcher searcher = new IndexSearcher(dir);

    // pub date of TTC was September 2006
    NumericRangeQuery query = NumericRangeQuery.newIntRange("pubmonth",
                                                            200605,
                                                            200609,
                                                            false,
                                                            false);
    TopDocs matches = searcher.search(query, 10);
    assertEquals(0, matches.totalHits);
    searcher.close();
    dir.close();
  }

}