How to convert field to Java properties

Elastic Stack Elasticsearch
1

I use elasticsearch-java version 8.10.4 rather than spring-data-elasticsearch.
In my elasticsearch index, the field is underline-word such as "user_id". But in my Java Object, it is "userId". when i get the SearchResponse, the value of "userId" is null, as all the camel-case properties. But the simple property like "id", "model", it works well. How can I resolve it ?

2

Need help, please

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