用Lucene提升新文档 [英] Boost fresh documents with Lucene

问题描述

Lucene是否提供了一种提升新文档的方法？

Does Lucene provide a means to boost fresh documents?

例如，假设Lucene文档包含日期字段。是否有可能在没有用户改变她的查询的情况下，以更高的分数呈现最新的文档？

For example suppose that the Lucene document includes a date field. Is it possible, without having the user to alter her query anyhow, to present the most recent documents with a higher score?

我不想采用粗略的按日期排序解决方案，因为它会完全取消评分算法。

I do not want to resort to a coarse "sort by date" solution as it will completely cancel the scoring algorithm.

推荐答案

将文档放入索引时使用Document.setBoost（浮点值）。

Use Document.setBoost(float value) when putting documents into the index.

您可以不断重新调整现有文档的值，或者有一个随日期递增的浮点值，这样您只需要将它应用到插入文档的时间。

You can either constantly re-adjust the value on existing documents, OR have a float value that increments with date, so that you only need to apply it to the time that documents are inserted.

例如，从第1天文档的提升值0开始。每天，将提升增加1.这是一个浮动值，每年增加365将持续很长时间。

For example, start with a boost value of 0 for day 1 documents. Each day, increment the boost by 1. It's a float value, incrementing by 365 each year will last a long time.

你可能需要试验强度提升你想要的效果。

You may have to experiment with the strength of the boost to get the effect you want.

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