73 lines
1.4 KiB
Java
73 lines
1.4 KiB
Java
package com.vibevault.model;
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import jakarta.persistence.*;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* 歌单实体类
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*
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* 需要实现：
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* - 将此类映射为数据库表 "playlists"
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* - id 作为自增主键
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* - name 不能为空
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* - 每个歌单属于一个用户（多对一关系）
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* - 一个歌单包含多首歌曲（一对多关系）
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* - 删除歌单时应级联删除其中的歌曲
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*/
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public class Playlist {
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private Long id;
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private String name;
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private User owner;
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private List<Song> songs = new ArrayList<>();
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protected Playlist() {
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}
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public Playlist(String name, User owner) {
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this.name = name;
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this.owner = owner;
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}
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public Long getId() {
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return id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public User getOwner() {
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return owner;
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}
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public List<Song> getSongs() {
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return Collections.unmodifiableList(songs);
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}
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/**
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* 向歌单添加歌曲
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* 提示：需要维护双向关系
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*/
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public void addSong(Song song) {
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// TODO: 实现添加歌曲逻辑
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}
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/**
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* 从歌单移除歌曲
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* 提示：需要维护双向关系
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*/
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public void removeSong(Song song) {
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// TODO: 实现移除歌曲逻辑
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}
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}
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