https://lob-dev.tistory.com/entry/객체-변환하기-자바-코드-매핑-vs-MapStruct-vs-ModelMapper

https://pythonq.com/so/java/538376

@Mapping ( target = , source ) // 이렇게 하시면 더보기 편합니다

	
		@OneToMany(mappedBy = "post", orphanRemoval = true)
    private List<Authority> authorities = new ArrayList<>();

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "author_id")
    private User author;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "state_id")
    private PostState state;

    @NotNull
    @Column(nullable = false)
    private String title;

    @Column(name = "preview_text")
    private String previewText;

    @Column(name = "available_at")
    @Temporal(TemporalType.DATE)
    private Date availableAt;

    @Embedded
    private Point location;

////////////

		private String title;
    private String previewText;
    private Point location;
    private String availableAt;
    private List<String> authortities;
    private List<OrderImage> imageFiles;
    private String content;
    private String authorNickname;