Lucene关于实现Similarity自定义排序 - 起跑人生,追逐梦想,超越现实 - ITeye技术网站



Lucene关于实现Similarity自定义排序 - 起跑人生,追逐梦想,超越现实 - ITeye技术网站
所以经过各部门商量,职位搜索的结果排序应该是,相关度优先,然后才是职位的发布时间倒序.即如果关键字匹配是一定要全部命中了才会排在第一位,然后再是只命中一部分关键字记录.具体如下图,(搜索"php 开发",这样的话,只有php,开发这两个关键字都全部匹配了才会排前.然后全部命中关键字的记录按职位的发布时间来递减.)

在看代码之前先看看我们Lucene排序的一些影响因为,大家可以在搜索的时候,开启Explain的选项,这样就能看得清楚了 
比如说,我现在要搜索 "开发工程" 这些关键字,然后就会把每一个Document的得分情况都列出来,大家就知道了,同时大家有没发现,这一个详细情况跟Similarity的需要实现的方法的因素基本都是对应的..比如 idf,tf queryNorm等方法..这样大家就有一个可以参考分析的方法了. 
writer.setSimilarity(similarity);
  1.                     Explanation exp = search.explain(bq, docId);  
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