【Spring/SpringBoot】Spring Data Jpa更新部分字段遇到的问题及解决方案

问题假设mysql中有一张product_category表,它有以下列category_id主键自增category_name类目名(notnull)category_type类目编号(notnull)且存在一条记录|category_id|category_name|category_type|
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