@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT") private Date createTime;

这是一个使用 Jackson 库的 Java 代码片段，用于在实体类中格式化日期类型的 createTime 属性。@JsonFormat 注解指定了日期格式为 "yyyy-MM-dd HH:mm:ss"，时区为 GMT。这样在序列化和反序列化 JSON 数据时，Jackson 库会自动将 createTime 属性的值转换为指定的格式。

相关问题

@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。

@Data @TableName("bis_task") public class BisTask { private static final long serialVersionUID = 1L; @TableId(value="id" , type = IdType.AUTO) private Integer id; @TableField("task_name") private String taskName; @TableField("create_time") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date createTime; @TableField("task_status") private Integer taskStatus; @TableField("expect_task_start_date") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8") private Date expectTaskStartDate; @TableField("actual_task_start_date") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date actualTaskStartDate; @TableField("expect_task_end_date") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8") private Date expectTaskEndDate; @TableField("actual_task_end_date") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private Date actualTaskEndDate; @TableField("fly_place") private String flyPlace; } 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，以下是根据id修改BisTask类的方法，同时修改BisTask关联的其他类的相关信息：

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

    @Autowired
    private BisTaskTowerMapper bisTaskTowerMapper;

    @Autowired
    private BisTowerMapper bisTowerMapper;

    @Autowired
    private BisProjectMapper bisProjectMapper;

    /**
     * 根据id修改BisTask类的相关信息
     * BisTask类的id关联BisTaskTower类的taskId，
     * BisTower类的id关联BisTaskTower类的towerId，
     * BisTower类的projectId关联BisProject类的id
     *
     * @param id           BisTask的id
     * @param projectName BisProject的projectName
     * @param bisTask      BisTask对象，修改的其他属性值
     * @return 是否修改成功
     */
    public boolean updateBisTaskAndRelatedInfoById(Integer id, String projectName, BisTask bisTask) {
        // 根据id查询BisTask
        BisTask oldTask = getById(id);
        if (oldTask == null) {
            return false;
        }
        // 更新BisTask的属性值
        oldTask.setTaskName(bisTask.getTaskName());
        oldTask.setCreateTime(bisTask.getCreateTime());
        oldTask.setTaskStatus(bisTask.getTaskStatus());
        oldTask.setExpectTaskStartDate(bisTask.getExpectTaskStartDate());
        oldTask.setActualTaskStartDate(bisTask.getActualTaskStartDate());
        oldTask.setExpectTaskEndDate(bisTask.getExpectTaskEndDate());
        oldTask.setActualTaskEndDate(bisTask.getActualTaskEndDate());
        oldTask.setFlyPlace(bisTask.getFlyPlace());

        // 更新BisTaskTower的属性值
        QueryWrapper<BisTaskTower> bisTaskTowerQueryWrapper = new QueryWrapper<>();
        bisTaskTowerQueryWrapper.eq("task_id", id);
        List<BisTaskTower> bisTaskTowerList = bisTaskTowerMapper.selectList(bisTaskTowerQueryWrapper);
        for (BisTaskTower bisTaskTower : bisTaskTowerList) {
            bisTaskTower.setTaskId(oldTask.getId());
            bisTaskTowerMapper.updateById(bisTaskTower);
        }

        // 更新BisTower的属性值
        QueryWrapper<BisTower> bisTowerQueryWrapper = new QueryWrapper<>();
        bisTowerQueryWrapper.in("id", bisTaskTowerList.stream().map(BisTaskTower::getTowerId).collect(Collectors.toList()));
        List<BisTower> bisTowerList = bisTowerMapper.selectList(bisTowerQueryWrapper);
        for (BisTower bisTower : bisTowerList) {
            bisTower.setProjectId(bisProjectMapper.selectOne(new QueryWrapper<BisProject>().eq("project_name", projectName)).getId());
            bisTowerMapper.updateById(bisTower);
        }

        // 更新BisTask
        return updateById(oldTask);
    }
}

需要注意的是，这里传入的BisTask对象只需要包含需要修改的属性值，其他属性值会从数据库中查询出来并更新。另外，需要注意更新BisTower时需要先根据BisTaskTower的towerId查询出BisTower对象，再根据BisTower的projectId查询出BisProject的id，最后更新BisTower的projectId。