此内容没有您所选择的语言版本。

4.4. Boosting


Lucene uses boosting to attach more importance to specific fields or documents over others. Lucene differentiates between index and search-time boosting.

4.4.1. Static Index Time Boosting

The @Boost annotation is used to define a static boost value for an indexed class or property. This annotation can be used within @Field, or can be specified directly on the method or class level.
In the following example:
  • the probability of Essay reaching the top of the search list will be multiplied by 1.7.
  • @Field.boost and @Boost on a property are cumulative, therefore the summary field will be 3.0 (2 x 1.5), and more important than the ISBN field.
  • The text field is 1.2 times more important than the ISBN field.

Example 4.7. Different ways of using @Boost

@Indexed
@Boost(1.7f)
public class Essay {
    ...

    @Field(name="Abstract", store=Store.YES, boost=@Boost(2f))
    @Boost(1.5f)
    public String getSummary() { return summary; }

    @Field(boost=@Boost(1.2f))
    public String getText() { return text; }

    @Field
    public String getISBN() { return isbn; }

}
Copy to Clipboard Toggle word wrap
返回顶部
Red Hat logoGithubredditYoutubeTwitter

学习

尝试、购买和销售

社区

关于红帽文档

通过我们的产品和服务,以及可以信赖的内容,帮助红帽用户创新并实现他们的目标。 了解我们当前的更新.

让开源更具包容性

红帽致力于替换我们的代码、文档和 Web 属性中存在问题的语言。欲了解更多详情,请参阅红帽博客.

關於紅帽

我们提供强化的解决方案,使企业能够更轻松地跨平台和环境(从核心数据中心到网络边缘)工作。

Theme

© 2025 Red Hat