Dieffrence between _Id and Id in JPA-CodePudding

What's the difference between those two lines in JPA

public interface PostRepository extends JpaRepository<Post, Long> {
    List<Post> findByUser_Id(Long id);
}

And

public interface PostRepository extends JpaRepository<Post, Long> {
    List<Post> findByUserId(Long id);
}

CodePudding user response：

Its just the name of the method. Other than that, there is no difference between those lines.

CodePudding user response：

The only difference is the method name the class that implements the interface will need to use. They are otherwise identical. If you have a choice, use one that follows your convention, for consistency.