Getting entity and wrapping it into Optional.ofNullable() works normally (just as workaround): publicinterfaceExampleRepository2extendsJpaRepository<ExampleEntity,Long> {ExampleEntityfindFirstByOrderByCreatedAtDesc(); }
但是涉及到的东西还是挺多的，网上大部分关于 JPA 的资料都不是特别齐全，大部分用的版本也是比较落后的...
那么这些方法究竟是怎么来的呢？答案很简单，对于我们自定义的Dao接口，由于继承了JpaRepository和Jpa...
JPA:Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Failed to create query for method public abstract com.***.***.entity.User com.***.***.repository.UserRepository.findFirstByPhone_no(java.lang.String) 27282930 1 14 21...