如何在springboot中使用Crudepository基于inverseColumn数据检索数据？

我有两个表，即用户和事件。用户表将在新用户注册时填写。稍后，同一用户可以创建日历事件。因此，事件表将被填充，用户\事件将根据用户保持事件的映射。 我想查找基于登录用户ID的所有事件。这里是查询，它应该返回基于它的数据。 从事件中选择*从事件中选择eventid从用户中选择eventid\u事件中选择id\u user=x。这是我的用户和事件实体类

User.java

    @Entity
    @Table(name = "users")
    public class User {

@Id
@GenericGenerator(name = "generator", strategy = "increment")
@GeneratedValue(generator = "generator")
@Column(name = "id", nullable = false)
private Long id;

@Column(name = "first_name", nullable = false)
private String firstName;

@Column(name = "family_name", nullable = false)
private String familyName;

@Column(name = "e_mail", nullable = false)
private String email;

@Column(name = "phone", nullable = false)
private String phone;

@Column(name = "language", nullable = false)
private String language;

@Column(name = "id_picture")
private String pictureId;

@Column(name = "login", nullable = false)
private String login;

@Column(name = "password", nullable = false)
private String password;

@Column(name = "birth_date")
private Date birthDate;

@Column(name = "enabled")
private Boolean enabled;
   //getter and setter

Event.java

    @Entity
    @Table(name = "events")
    public class Event {
@Id
@GenericGenerator(name = "generator", strategy = "increment")
@GeneratedValue(generator = "generator")
@Column(name = "eventId", nullable = false)
private Long eventId;

@Column(name = "title", nullable = false)
private String title;

@Column(name = "description", nullable = true)
private String description;

@Column(name = "startAt", nullable = false)
@Temporal(TemporalType.TIMESTAMP)
private Date startAt;

@Column(name = "endAt", nullable = true)
@Temporal(TemporalType.TIMESTAMP)
private Date endAt;

@Column(name = "isFullDay", nullable = false)
private Boolean isFullDay;

@ManyToMany(fetch = FetchType.EAGER)
@JoinTable(name = "users_event", joinColumns = { @JoinColumn(name = "id_event", referencedColumnName = "eventId") }, inverseJoinColumns = { @JoinColumn(name = "id_user", table = "users", referencedColumnName = "id") })
private Set<User> user = new HashSet<User>();
/getter and setter

EventRepo.java

   public interface EventRepo extends CrudRepository<Event, Long> {
Event findByUser(Set<User> user);
    }

我正在尝试实现一些东西，它可以给我这个查询的输出。 从事件中选择*从用户中选择事件id从事件中选择事件id从事件中选择事件id\u user=x 这是我的实现。有什么输入吗

       @RequestMapping(value = "/events", method = RequestMethod.GET)
public @ResponseBody List<Event> getEvents() {
    logger.debug("get event list");
    User x=new User();
    x.setId(1);
    Set<User> user= new HashSet();
    user.add(x);
    return (List<Event>) eventRepo.findByUser(user);
}

---

只需在EventRepo中添加以下方法：

并将控制器修改为如下所示：

@RequestMapping(value = "/events", method = RequestMethod.GET)
public List<Event> getEvents() {
    return eventRepo.findAllByUserId(1L);
}

---

成功了！是否有任何规则来定义方法“findAllByUserId”？我还可以从Users表中使用哪些字段进行查询？是的，规则已经定义。您应该能够使用几乎任何字段。还有没有办法，在保存事件数据时，我可以只传递UserId而不是users表的所有现有列数据？目前我正在这样做：title:title，description:description，startAt:startTime，endAt:endTime，isFullDay:false，user:[{id:1，firstName:Steve，family:JOBS，email:Steve。jobs@apple.com，电话：0033 1 23 45 67 89，语言：en，pictureId:null，登录名：steve，密码：steve，burthDate:null，已启用：true，权限：[{id:1，名称：admin}，{id:2，名称：技术用户}，{id:3，名称：用户}]]是的，有。你要做的是为事件数据创建一个单独的类，比如带有普通userId字段的EventDTO，为用户界面UserRepo extensed JpaRepository创建一个存储库，然后在服务层中从EventDTO重建事件后，你可以执行event.setUserCollections.singletonuserRepo.getOneeventDTO.getUserId；。

@RequestMapping(value = "/events", method = RequestMethod.GET)
public List<Event> getEvents() {
    return eventRepo.findAllByUserId(1L);
}