Spring Boot & Elasticsearch 自定义查询结果排序

记一下调查查询结果排序的结果，以供今后参考。

首先是参考这篇博客使用 FunctionScoreQuery 实现自定义分值的方案。

queryBuilder.must(
    QueryBuilders.boolQuery()
        .should(QueryBuilders
            .functionScoreQuery(
                QueryBuilders.matchQuery(NovelField.TITLE, parameter.getKeyword()),
                ScoreFunctionBuilders.weightFactorFunction(1000)
            ))
        .should(QueryBuilders
            .functionScoreQuery(
                QueryBuilders.matchQuery(NovelField.AUTHOR, parameter.getKeyword()),
                ScoreFunctionBuilders.weightFactorFunction(500)
            ))
        .should(QueryBuilders
            .functionScoreQuery(
                QueryBuilders.matchQuery(NovelField.BRIEF, parameter.getKeyword()),
                ScoreFunctionBuilders.weightFactorFunction(10)
            ))
        .should(QueryBuilders
            .functionScoreQuery(
                QueryBuilders.matchQuery(NovelField.MAJOR_CHARACTERS, parameter.getKeyword()),
                ScoreFunctionBuilders.weightFactorFunction(100)
            ))
);

第二种是查看之前的笔记，可以通过修改 boost 调整查询权重，示例如下：

queryBuilder.must(
    QueryBuilders.boolQuery()
        .should(QueryBuilders.matchQuery(NovelField.TITLE, parameter.getKeyword()).boost(1000))
        .should(QueryBuilders.matchQuery(NovelField.AUTHOR, parameter.getKeyword()).boost(500))
        .should(QueryBuilders.matchQuery(NovelField.BRIEF, parameter.getKeyword()).boost(10))
        .should(QueryBuilders.matchQuery(NovelField.MAJOR_CHARACTERS, parameter.getKeyword()).boost(100))
);