findOne与getOne的注释
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/**
* Retrieves an entity by its id.
*
* @param id must not be {@literal null}.
* @return the entity with the given id or {@literal null} if none found
* @throws IllegalArgumentException if {@code id} is {@literal null}
*/
T findOne(ID id);
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/**
* Returns a reference to the entity with the given identifier.
*
* @param id must not be {@literal null}.
* @
return a reference
to the entity with the given identifier.
* @see EntityManager#getReference(Class, Object)
*/
T getOne(ID id);
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getOne是“Returns a reference“
本文详细解释了findOne和getOne方法的区别,包括参数、返回值和异常处理,并提供了实例代码帮助理解。
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