如何使用JPA仅更新数据库中的指定列？

是否可以使用 Spring Data JPA 仅更新数据库中的某些列？

有一个实体类

@Entity
@NoArgsConstructor
@Setter
@EqualsAndHashCode
public class Task 
{
    private Long id;
    private String title;
    private Integer completed;
    private Date date;
    private Priority priority;
    private Category category;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    public Long getId()
    {
        return id;
    }

    @Basic
    @Column(name = "title")
    public String getTitle()
    {
        return title;
    }

    @Basic
    @Column(name = "completed")
    public Integer getCompleted()
    {
        return completed;
    }

    @Basic
    @Column(name = "date")
    public Date getDate()
    {
        return date;
    }

    @ManyToOne
    @JoinColumn(name = "priority_id", referencedColumnName = "id")
    public Priority getPriority()
    {
        return priority;
    }

    @ManyToOne
    @JoinColumn(name = "category_id", referencedColumnName = "id")
    public Category getCategory()
    {
        return category;
    }
}

控制器类

@RestController
@RequestMapping("/task")
public class TaskController
{
    private TaskRepository taskRepository;

    public TaskController(TaskRepository taskRepository)
    {
        this.taskRepository = taskRepository;
    }

    //Some CRUD methods

    @PutMapping("/update")
    public ResponseEntity update(@RequestBody Task task)
    {
        taskRepository.save(task);

        return ResponseEntity.ok("Update was successful");
    }
}

仓库接口

public interface TaskRepository extends JpaRepository<Task, Long>
{
}

当我从客户端发送 JSON 更新请求而不使用所有字段时，例如：

{
    "id": 5,
    "title": "Read the book"        
}

所有那些我没有使用的字段都会自动设置为空，并且数据库中的所有列都被空覆盖。

有没有办法只更新那些我在 JSON 请求中直接指定字段值的列而不更改其余列？同时可以给JSON请求中的一些变量赋值为null，例如

{
    "id": 5,
    "title": "Read the book",
    "completed": null        
}