@Data @ApiModel(value = "飞行任务管理-后端列表页vo") public class BisTaskVO extends PageReqVO implements Serializable { @ApiModelProperty(value = "id") private Integer id; @ApiModelProperty(value = "项目名称") private String projectName; @ApiModelProperty(value = "任务名称") private String taskName; @ApiModelProperty(value = "期望飞行开始时间") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8") private Date expectTaskStartDate; @ApiModelProperty(value = "实际飞行开始时间") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date actualTaskStartDate; @ApiModelProperty(value = "期望飞行结束时间") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8") private Date expectTaskEndDate; @ApiModelProperty(value = "实际飞行结束时间") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date actualTaskEndDate; @ApiModelProperty(value = "飞行地点") private String flyPlace; @ApiModelProperty(value = "任务创建时间") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date createTime; @ApiModelProperty(value = "任务修改时间") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date updateTime; @ApiModelProperty(value = "任务状态 1 待指派 2已指派 3已完成 4待飞行 5待上传 6已上传 7驳回 8审核通过") private Integer taskStatus; } 帮我写一个根据id修改，但是projectName是BisProject类的, BisTask类的id关联BisTaskTower类的taskId， BisTower类的id关联BisTaskTower类的Id， BisTower类的projectId关联BisProject类的id， 用mybtais-plus修改，不要写mapper和sql

好的，这里是根据id修改BisTaskVO的代码：

@Service
public class BisTaskService extends ServiceImpl<BisTaskMapper, BisTask> {

    @Autowired
    private BisTaskTowerMapper bisTaskTowerMapper;

    @Autowired
    private BisTowerMapper bisTowerMapper;

    @Autowired
    private BisProjectMapper bisProjectMapper;

    public boolean updateBisTaskVOById(BisTaskVO bisTaskVO) {
        // 根据id查询BisTask
        BisTask bisTask = getById(bisTaskVO.getId());
        if (bisTask == null) {
            return false;
        }

        // 更新BisTask
        BeanUtils.copyProperties(bisTaskVO, bisTask);
        updateById(bisTask);

        // 更新BisProject
        BisProject bisProject = bisProjectMapper.selectOne(new QueryWrapper<BisProject>()
                .eq("id", bisTaskVO.getProjectId()));
        if (bisProject != null) {
            bisProject.setProjectName(bisTaskVO.getProjectName());
            bisProjectMapper.updateById(bisProject);
        }

        // 更新BisTower
        BisTaskTower bisTaskTower = bisTaskTowerMapper.selectOne(new QueryWrapper<BisTaskTower>()
                .eq("task_id", bisTaskVO.getId()));
        if (bisTaskTower != null) {
            BisTower bisTower = bisTowerMapper.selectOne(new QueryWrapper<BisTower>()
                    .eq("id", bisTaskTower.getTowerId()));
            if (bisTower != null) {
                bisTower.setProjectId(bisTaskVO.getProjectId());
                bisTowerMapper.updateById(bisTower);
            }
        }

        return true;
    }
}

这里假设你已经定义好了`BisTaskMapper`和`BisTask`，以及其他相关的Mapper和实体类。在`updateBisTaskVOById`方法中，我们首先根据id查询到要修改的`BisTask`对象，然后将`BisTaskVO`中的属性复制到`BisTask`中，并更新到数据库。接着，我们根据`BisTask`的id查询到对应的`BisTaskTower`对象，从而得到`BisTower`对象，并将其`projectId`属性更新为`BisTaskVO`中的`projectId`。最后，我们还需要根据`BisTaskVO`中的`projectId`更新对应的`BisProject`对象。这里使用了`BeanUtils.copyProperties`来实现对象属性的复制，避免了手动设置每个属性。