public class HandleBusinessTO { @Field private Long id; @Field(name = "产品一级分类数据") private String name; } List<String> list转换为List<HandleBusinessTO>

可以通过循环遍历`List<String>`中的元素，创建新的`HandleBusinessTO`对象，并将元素赋值给`name`属性。然后将每个新创建的`HandleBusinessTO`对象添加到一个新的`List<HandleBusinessTO>`中。以下是示例代码：

List<String> stringList = Arrays.asList("数据1", "数据2", "数据3");
List<HandleBusinessTO> handleBusinessTOList = new ArrayList<>();

for (String str : stringList) {
    HandleBusinessTO handleBusinessTO = new HandleBusinessTO();
    handleBusinessTO.setName(str);
    handleBusinessTOList.add(handleBusinessTO);
}

// handleBusinessTOList 就是转换后的 List<HandleBusinessTO>

这样就将 `List<String>` 转换为 `List<HandleBusinessTO>`。请注意，示例代码假设 `HandleBusinessTO` 类具有默认的构造函数和相应的 `setName` 方法。

相关问题

@Data public class Dish implements Serializable { private Long id;//主键 private String name;//菜品名称 private Long categoryId;//所属分类id private BigDecimal price;//菜品价格 private String code;//商品码 private String image;//图片 private String description;//描述信息 private Integer status;//0 停售 1 起售 private Integer sort;//顺序 @TableField(fill = FieldFill.INSERT) @JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss") private Date createTime; @TableField(fill = FieldFill.INSERT_UPDATE) @JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss") private Date updateTime; @TableField(fill = FieldFill.INSERT) private Long createUser; @TableField(fill = FieldFill.INSERT_UPDATE) private Long updateUser; //===================数据表中不存在下面字段,仅仅用于页面显示=================== //菜品口味列表 @TableField(exist = false) private List<DishFlavor> flavors = new ArrayList<>(); //菜品分类名称 @TableField(exist = false) private String categoryName; @TableField(exist = false) private Integer copies; }利用springboot分页查询

可以使用Spring Data JPA提供的PagingAndSortingRepository接口来实现分页查询，具体步骤如下：

1.在DishRepository中继承PagingAndSortingRepository接口。

public interface DishRepository extends PagingAndSortingRepository<Dish, Long> {

}

2.在DishService中定义一个方法来实现分页查询。

@Service
public class DishService {
    @Autowired
    private DishRepository dishRepository;

    public Page<Dish> findDishByPage(int pageNum, int pageSize) {
        Sort sort = Sort.by(Sort.Direction.DESC, "createTime");
        Pageable pageable = PageRequest.of(pageNum - 1, pageSize, sort);
        return dishRepository.findAll(pageable);
    }
}

3.在DishController中调用该方法。

@RestController
@RequestMapping("/dishes")
public class DishController {
    @Autowired
    private DishService dishService;

    @GetMapping("/page")
    public Page<Dish> findDishByPage(@RequestParam(defaultValue = "1") int pageNum,
                                     @RequestParam(defaultValue = "10") int pageSize) {
        return dishService.findDishByPage(pageNum, pageSize);
    }
}

其中，PageRequest.of()方法用于创建分页请求对象，findAll()方法用于执行分页查询操作。在方法中还可以设置排序方式，例如按照创建时间倒序排序。

@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。