生成一个类图 有图书、用户、评分、评论、标签、数据统计等类 图书类用户类有增删改查等方法,用户通过评分给图书评分,用户通过评论给图书评论,标签关联图书,通过数据统计进行图书推荐 PlantUml的代码要怎么写
时间: 2023-06-25 13:07:22 浏览: 32
以下是PlantUML代码的示例:
```
@startuml
class Book {
-id: int
-title: string
-author: string
-publisher: string
-price: float
+getRating(): float
+getComments(): List<Comment>
+addComment(comment: Comment): void
+getTags(): List<Tag>
+addTag(tag: Tag): void
+update(): void
+delete(): void
}
class User {
-id: int
-username: string
-password: string
-email: string
+getRatings(): List<Rating>
+getComments(): List<Comment>
+addRating(rating: Rating): void
+addComment(comment: Comment): void
+update(): void
+delete(): void
}
class Rating {
-id: int
-user_id: int
-book_id: int
-score: int
}
class Comment {
-id: int
-user_id: int
-book_id: int
-content: string
}
class Tag {
-id: int
-name: string
+getBooks(): List<Book>
+addBook(book: Book): void
}
class DataStatistics {
+recommendBooks(user: User): List<Book>
}
Book "1" -- "0..*" Comment
Book "1" -- "0..*" Tag
User "1" -- "0..*" Rating
User "1" -- "0..*" Comment
Tag "0..*" -- "0..*" Book
User -- DataStatistics
@enduml
```
以上代码会生成一个包含Book,User,Rating,Comment,Tag和DataStatistics这些类的UML类图。其中,Book和User类都包含了增删改查等方法,并且有与Rating,Comment和Tag类的关联关系。同时,DataStatistics类提供了用于图书推荐的方法。