在我的spring应用程序中，lazy fetch不起作用，这使得db中的fetch操作很繁重。所以，当我招学生的时候，就是迫不及待地招那些甚至被标记为懒惰的领域。我的班是学生班

class Student{
   Long id;

   @ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL, optional = false)
   @JoinColumn(name = "tutor_fk", nullable = false)
   Tutor tutor;

   @OneToMany(fetch = FetchType.LAZY, mappedBy = Courses.student, cascade = CascadeType.ALL)
   Set<Courses> courses = new HashSet<>();

  }

课程.班级

class Courses{
  Long id;
  String create_date_time;
  @ManyToOne
  @JoinColumn(name = "student_fk")
  Student student;
 }

辅导班

class Tutor{
 Long id;
 String name;
}

学生服务.class

@Transactional
class studentService{
List<Students> getStudent(Long id){
  return studentRepository.findOneById(id);
} }

当我在org.hibernate.sql上运行代码时：debug。查询命中率

select course0_.id as id1_43_0_, course0_.create_date_time as create_date_time2_43_0_ 
  from course course0_ where course0_.id=?
 select tutor0_.id as id1_43_0_, tutor0_.name as name2_43_0_ 
  from tutor tutor0_ where tutor0_.id=?

我做错了，当这些字段被标记为lazy时，它将上述查询作为earge