小编Geo*_*zov的帖子

我试图通过 ID 获取对象，但我无法弄清楚为什么我得到 null 并且它不起作用..

@Entity
@Table(name = "exercises")
public class ExerciseEntity {

@Id
private Long id;
private String nameOfExercise;
private Integer caloriesBurnedForHour;
@Column(columnDefinition = "TEXT")
private String bonusInfo;
@ManyToMany(mappedBy = "exerciseEntityList",fetch = FetchType.EAGER)
private List<PersonalTrainingProgram> personalTrainingPrograms;

public ExerciseEntity() {
}


@Entity
public class PersonalTrainingProgram {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@ManyToMany
@JoinTable()
private List<ExerciseEntity> exerciseEntityList;
@ManyToOne
private FoodProgram foodProgram;
@ManyToOne
private AppUser appUser;

public PersonalTrainingProgram() {
}

这是方法，

@Override
public List<ExerciseEntity> findExercisesBySpecificId(List<ExerciseDto> exerciseDto) {

    List<ExerciseEntity> listEntity= new …