Java设计模式之备忘录模式

/**
 * 备忘录（完稿）
 * @author tcy
 * @Date 16-09-2022
 */
public class VideoMemento {
    private String title;
    private String videoUrl;
    private String imgs;

    public VideoMemento(String title, String content, String imgs) {
        this.title = title;
        this.videoUrl = content;
        this.imgs = imgs;
    }

    public String getTitle() {
        return title;
    }

    public String getContent() {
        return videoUrl;
    }

    public String getImgs() {
        return imgs;
    }

    @Override
    public String toString() {
        return "ArticleMemento{" +
                "title='" + title + '\'' +
                ", content='" + videoUrl + '\'' +
                ", imgs='" + imgs + '\'' +
                '}';
    }
}

/**
 * 发起人 （草稿）
 * @author tcy
 * @Date 16-09-2022
 */
public class Editor {
    private String title;
    private String videoUrl;
    private String imgs;

    public Editor(String title, String videoUrl, String imgs) {
        this.title = title;
        this.videoUrl = videoUrl;
        this.imgs = imgs;
    }

    public String getTitle() {
        return title;
    }

    public String getContent() {
        return videoUrl;
    }

    public String getImgs() {
        return imgs;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public void setContent(String content) {
        this.videoUrl = content;
    }

    public void setImgs(String imgs) {
        this.imgs = imgs;
    }

    /**
     *  保存到备忘录
     * @return
     */
    public VideoMemento saveToMemento(){
        VideoMemento articleMemento = new VideoMemento(this.title,this.videoUrl,this.imgs);
        return articleMemento;
    }

    /**
     * 从备忘录恢复
     * @param articleMemento
     */
    public void undoFromMemento(VideoMemento articleMemento){
        this.title = articleMemento.getTitle();
        this.videoUrl = articleMemento.getContent();
        this.imgs = articleMemento.getImgs();
    }

    @Override
    public String toString() {
        return "Editor{" +
                "title='" + title + '\'' +
                ", content='" + videoUrl + '\'' +
                ", imgs='" + imgs + '\'' +
                '}';
    }
}

/**
 * 管理者（草稿箱）
 * @author tcy
 * @Date 16-09-2022
 */
public class Caretaker {
    private final Stack<VideoMemento> STACK = new Stack<VideoMemento>();

    public VideoMemento getMemento(){
        VideoMemento videoMemento = STACK.pop();
        return videoMemento;
    }

    public void addMemento(VideoMemento videoMemento){
        STACK.push(videoMemento);
    }
}