Mybaits之@Options(useGeneratedKeys = true, keyProperty = “xxxx”)作用

useGeneratedKeys 设置为"true"表明要 MyBatis 获取由数据库自动生成的主键；

keyProperty="id"指定把获取到的主键值注入到 XXX（实体类） 的 id 属性。

如配置中开启了@Options(useGeneratedKeys = true")会报错

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.executor.ExecutorException: Error getting generated key or setting result to parameter object. Cause: org.apache.ibatis.executor.ExecutorException: No setter found for the keyProperty ‘id’ in com.xx.xx.entity.xxxx.
在mapper层加上下面这句：

@Options(useGeneratedKeys = true, keyProperty = "majorId")