【学习日记】（SpringBoot-part 6）新闻管理系统—评论功能/分类和标签功能

新闻评论功能

效果展示

可以直接在新闻底下输入姓名和邮箱评论，也可以回复别人发表的评论

功能实现

1. 新建实体类
   在pojo目录下新建一个Comment的实体类，主要包含昵称、邮箱、评论内容、头像和创建时间，接着就是声明实体间对应的关系

@Entity
@Table(name = "t_comment")
public class Comment {
   

    @Id //主键标识
    @GeneratedValue(strategy = GenerationType.IDENTITY)  //自增
    private Long id;
    private String nickname;
    private String email;
    private String content;
    private String avatar;
    @Temporal(TemporalType.TIMESTAMP)
    private Date createTime;

    @ManyToOne
    private News news;

    @OneToMany(mappedBy = "parentComment")
    private List<Comment> replyComment = new ArrayList<>();

    @ManyToOne
    private Comment parentComment;

    //管理员评论
    private boolean adminComment;

    public Comment() {
   
    }

    public Long getId() {
   
        return id;
    }

    public void setId(Long id) {
   
        this.id = id;
    }

    public String getNickname() {
   
        return nickname;
    }

    public void setNickname(String nickname) {
   
        this.nickname = nickname;
    }

    public String getEmail() {
   
        return email;
    }

    public void setEmail(String email) {
   
        this.email = email;
    }

    public String getContent() {
   
        return content;
    }

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

    public String getAvatar() {
   
        return avatar;
    }

    public void setAvatar(String avatar) {
   
        this.avatar = avatar;
    }

    public Date getCreateTime() {
   
        return createTime;
    }

    public void setCreateTime(Date createTime) {
   
        this.createTime = createTime;
    }

    public News getNews() {
   
        return news;
    }

    public void setNews(News news) {
   
        this.news = news;
    }

    public List<Comment> getReplyComment() {
   
        return replyComment;
    }

    public void setReplyComment(List<Comment> replyComment) {
   
        this.replyComment = replyComment;
    }

    public C