Spring Boot音乐服务器项目如何删除音乐模块

    /**
     根据ID删除⾳乐
     @param musicId
     @return
     */
    int deleteMusicById(int musicId);
    /**
     根据ID查询⾳乐
     @param id
     @return
     */
    Music findMusicById(int id);

    </insert>
    <delete id="deleteMusicById" parameterType="java.lang.Integer">
        delete from music where id = #{id}
    </delete>
    <select id="findMusicById" resultType="com.example.musicplayer.model.Music">
        select * from music where id = #{id}
    </select>

@RequestMapping("/delete")
    public ResponseBodyMessage<Boolean> deleteMusicById(@RequestParam String id){
        int musicId = Integer.parseInt(id);
        Music music = musicMapper.findMusicById(musicId);
        if (music == null)
            return new ResponseBodyMessage<>(-1,"没有你所需要的音乐",false);
            int ret = musicMapper.deleteMusicById(musicId);
            if (ret == 1) {
                int index = music.getUrl().lastIndexOf("=");
                String filename = music.getUrl().substring(index + 1);
                File file = new File(SAVE_PATH + "/" + filename + ".mp3");
                System.out.println("路径为:" + file.getPath());
                if (file.delete()) {
                    return new ResponseBodyMessage<>(0, "删除音乐成功", true);
                } else {
                    return new ResponseBodyMessage<>(1, "删除音乐失败", false);
                }
            }else {
                return new ResponseBodyMessage<>(-1,"在数据库中删除音乐失败",false);
            }
        }

/**
     根据id数组批量删除⾳乐
     @param id
     @return
     */
    @RequestMapping("/deleteSel")
    public ResponseBodyMessage<Boolean> deleteSelMusic(@RequestParam("id[]")
                                                               List<Integer> id) {
        int sum = 0;
        for (int i = 0; i < id.size(); i++) {
            Music music = musicMapper.findMusicById(id.get(i));
            int ret = musicMapper.deleteMusicById(id.get(i));
            if(ret == 1) {
                //数据库删除成功，那么服务器上的数据也需要发⽣改变
                //删除服务器⽬录下的对应的⽂件
                int index = music.getUrl().lastIndexOf("=");
                String filename = music.getUrl().substring(index+1);
                File file = new File(SAVE_PATH+"\\"+filename+".mp3");
                if(file.delete()) {
                    sum += ret;
                }else {
                    System.out.println("删除失败！");
                    return new ResponseBodyMessage<>(-1,"删除服务器上的⾳乐失败",false);
                }
            }else {
                System.out.println("删除失败！");
                return new ResponseBodyMessage<>(-1,"删除数据上的⾳乐信息失败",false);
            }
        }
        if(sum == id.size()) {
            System.out.println("删除成功！");
            return new ResponseBodyMessage<>(0,"批量删除成功",true);
        }else {
            System.out.println("删除失败！");
            return new ResponseBodyMessage<>(0,"批量删除成功",false);
        }
    }