如何使用 HitCollector 按字段值对 Lucene 结果进行排序?

问题描述

我正在使用以下代码在 Lucene.Net 中执行查询

I'm using the following code to execute a query in Lucene.Net

var collector = new GroupingHitCollector(searcher.GetIndexReader());
searcher.Search(myQuery, collector);
resultsCount = collector.Hits.Count;

如何根据字段对这些搜索结果进行排序?

How do I sort these search results based on a field?

感谢您的回答.我曾尝试使用 TopFieldDocCollector 但当我将 5000 作为 传递时出现错误提示，值太小或太大"numHits 参数值.请建议一个有效的值来传递.

Thanks for your answer. I had tried using TopFieldDocCollector but I got an error saying, "value is too small or too large" when i passed 5000 as numHits argument value. Please suggest a valid value to pass.

推荐答案

search.Searcher.search 方法将接受 search.Sort 参数，构造简单如下:

The search.Searcher.search method will accept a search.Sort parameter, which can be constructed as simply as:

new Sort("my_sort_field")

但是，可以对哪些字段进行排序有一些限制 - 它们需要被索引但不被标记化，并且值可以转换为 Strings、Floats或整数s.

However, there are some limitations on which fields can be sorted on - they need to be indexed but not tokenized, and the values convertible to Strings, Floats or Integers.

Lucene in Action 涵盖了所有细节，以及按多个字段排序等.

Lucene in Action covers all of the details, as well as sorting by multiple fields and so on.

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