瑞吉外卖Day06 - 技术栈

1.用户地址

1.1实体类

/**
 * 地址簿
 */
@Data
public class AddressBook implements Serializable {

    private static final long serialVersionUID = 1L;

    private Long id;


    //用户id
    private Long userId;


    //收货人
    private String consignee;


    //手机号
    private String phone;


    //性别 0 女 1 男
    private String sex;


    //省级区划编号
    private String provinceCode;


    //省级名称
    private String provinceName;


    //市级区划编号
    private String cityCode;


    //市级名称
    private String cityName;


    //区级区划编号
    private String districtCode;


    //区级名称
    private String districtName;


    //详细地址
    private String detail;


    //标签
    private String label;

    //是否默认 0 否 1是
    private Integer isDefault;

    //创建时间
    @TableField(fill = FieldFill.INSERT)
    private LocalDateTime createTime;


    //更新时间
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateTime;


    //创建人
    @TableField(fill = FieldFill.INSERT)
    private Long createUser;


    //修改人
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Long updateUser;


    //是否删除
    private Integer isDeleted;
}

1.2mapper

java 复制代码

@Mapper
public interface AddressBookMapper extends BaseMapper<AddressBook> {
}

1.3service

java 复制代码

public interface AddressBookService extends IService<AddressBook> {
}

java 复制代码

@Service
public class AddressBookServiceImpl extends ServiceImpl<AddressBookMapper, AddressBook> implements AddressBookService {
}

1.4controller

java 复制代码

/**
 * 地址簿管理
 */
@Slf4j
@RestController
@RequestMapping("/addressBook")
public class AddressBookController {

    @Autowired
    private AddressBookService addressBookService;

    /**
     * 新增
     */
    @PostMapping
    public R<AddressBook> save(@RequestBody AddressBook addressBook) {
        Long userId = BaseContext.getCurrentId();
        /*
         * 这里留了个坑，我把数据库create_Id和更新时间等字段改成了非空了，算是遗留Bug
         * 不知道为什么BaseContext拿不到用户Id数据，所以拿不到create_Id
         *
         * */
        addressBook.setUserId(userId);
        log.info("addressBook:{}", addressBook);
        addressBookService.save(addressBook);
        return R.success(addressBook);
    }

    /**
     * 设置默认地址
     */
    @PutMapping("default")
    public R<AddressBook> setDefault(@RequestBody AddressBook addressBook) {
        log.info("addressBook:{}", addressBook);
        LambdaUpdateWrapper<AddressBook> wrapper = new LambdaUpdateWrapper<>();
        wrapper.eq(AddressBook::getUserId, BaseContext.getCurrentId());
        wrapper.set(AddressBook::getIsDefault, 0);
        //SQL:update address_book set is_default = 0 where user_id = ?
        addressBookService.update(wrapper);

        addressBook.setIsDefault(1);
        //SQL:update address_book set is_default = 1 where id = ?
        addressBookService.updateById(addressBook);
        return R.success(addressBook);
    }

    /**
     * 根据id查询地址
     */
    @GetMapping("/{id}")
    public R get(@PathVariable Long id) {
        AddressBook addressBook = addressBookService.getById(id);
        if (addressBook != null) {
            return R.success(addressBook);
        } else {
            return R.error("没有找到该对象");
        }
    }

    /**
     * 查询默认地址
     */
    @GetMapping("default")
    public R<AddressBook> getDefault() {
        LambdaQueryWrapper<AddressBook> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(AddressBook::getUserId, BaseContext.getCurrentId());
        queryWrapper.eq(AddressBook::getIsDefault, 1);

        //SQL:select * from address_book where user_id = ? and is_default = 1
        AddressBook addressBook = addressBookService.getOne(queryWrapper);

        if (null == addressBook) {
            return R.error("没有找到该对象");
        } else {
            return R.success(addressBook);
        }
    }

    /**
     * 查询指定用户的全部地址
     */
    @GetMapping("/list")
    public R<List<AddressBook>> list(AddressBook addressBook) {
        addressBook.setUserId(BaseContext.getCurrentId());
        log.info("addressBook:{}", addressBook);

        //条件构造器
        LambdaQueryWrapper<AddressBook> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(null != addressBook.getUserId(), AddressBook::getUserId, addressBook.getUserId());
        queryWrapper.orderByDesc(AddressBook::getUpdateTime);

        //SQL:select * from address_book where user_id = ? order by update_time desc
        return R .success(addressBookService.list(queryWrapper));
    }
}

2.购物车

2.1实体类

java 复制代码

/**
 * 购物车
 */
@Data
public class ShoppingCart implements Serializable {

    private static final long serialVersionUID = 1L;

    private Long id;

    //名称
    private String name;

    //用户id
    private Long userId;

    //菜品id
    private Long dishId;

    //套餐id
    private Long setmealId;

    //口味
    private String dishFlavor;

    //数量
    private Integer number;

    //金额
    private BigDecimal amount;

    //图片
    private String image;

    private LocalDateTime createTime;
}

2.2mapper

java 复制代码

@Mapper
public interface ShoppingCartMapper extends BaseMapper<ShoppingCart> {
}

2.3service

java 复制代码

public interface ShoppingCartService extends IService<ShoppingCart> {
}

java 复制代码

@Service
public class ShoppingCartServiceImpl extends ServiceImpl<ShoppingCartMapper, ShoppingCart> implements ShoppingCartService {
}

2.4controller

java 复制代码

@Slf4j
@RestController
@RequestMapping("shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 往购物车内部添加
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart) {
        log.info("购物车数据:{}",shoppingCart.toString());
        //解析一下接受的对象不难发现没有用户ID，所以我们得设置一下用户Id，也就是当前购物车是谁的
        Long userId=BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        //判断当前传来的Id是菜品还是套餐，这两个肯定会有一个是Null
        Long dishId=shoppingCart.getDishId();
        Long setmealId = shoppingCart.getSetmealId();

        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId, userId);

        //动态拼接一下添加的查询条件
        if (dishId!=null){
            //传过来的是菜品而不是套餐
            lambdaQueryWrapper.eq(ShoppingCart::getDishId, dishId);
        }
        if (setmealId!=null){
            //传过来的是套餐而不是菜品
            lambdaQueryWrapper.eq(ShoppingCart::getSetmealId, setmealId);
        }
        /*
          SQL:select * from shopping_cart where user_Id=? and dish_Id=?/setmealId=?
          如果可以查出来，说明购物车已经加入了相关菜品
         */
        ShoppingCart cartServiceOne=shoppingCartService.getOne(lambdaQueryWrapper);

        //已经存在在购物车里
        if (cartServiceOne!=null){
            //在数量原有基础上+1
            Integer count = cartServiceOne.getNumber();
            cartServiceOne.setNumber(count + 1);
            /*
                update shopping_cart set number=（更新后数量）
            */
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //尚未存在购物车，就添加到购物车
            shoppingCart.setNumber(1);
            /*
                insert into shopping_cart (ShoppingCart解析出来的字段) values (ShoppingCart解析出来的数据)
            */
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            //因为这个分支的cartServiceOne是null，所以要覆盖一下
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);
    }

    /**
     * @return 购物车列表
     */
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(BaseContext.getCurrentId()!=null,ShoppingCart::getUserId, BaseContext.getCurrentId());

        // 最晚下单的 菜品或套餐在购物车中最先展示
        queryWrapper.orderByDesc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        return R.success(list);
    }


    /**
     * 一次性清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        //获取当前购物车用户Id
        Long userId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId, userId);
        shoppingCartService.remove(lambdaQueryWrapper);
        return R.success("清空成功");
    }
}

3.用户下单

3.1service

java 复制代码

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private ShoppingCartController shoppingCartController;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;


    /**
     * 订单提交（下单）
     *
     * @param orders
     */
    @Transactional
    @Override
    public void submit(Orders orders) {
        //获取用户Id
        Long userId = BaseContext.getCurrentId();
        //根据用户Id查询所对应的购物车内容
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(userId != null, ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(lambdaQueryWrapper);

        //如果订单是空就没必要下单了
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomException("购物车为空，不能下单");
        }

        //拿到用户数据
        User user = userService.getById(userId);

        //拿到用户的地址数据
        Long addressId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressId);
        if (addressBook == null) {
            throw new CustomException("地址有误，不能下单");
        }

        long orderId = IdWorker.getId();  // 订单号

        //遍历购物车列表，来算一下总金额
        //  购物车中 商品 的总金额 需要保证在多线程的情况下 也是能计算正确的，故需要使用原子类
        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();

            orderDetail.setOrderId(orderId);
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());

            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setAmount(item.getAmount());

            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());

            return orderDetail;

        }).collect(Collectors.toList());


        //填充订单对象信息（CV的）
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额，需要 遍历购物车，计算相关金额来得到
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        // 向订单表插入数据,一条数据，插入数据之前，需要填充如上属性
        this.save(orders);    //  --> ordersService.save(orders);

        // 向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //调用接口清空购物车
        shoppingCartController.clean();
    }

}

3.2controller

java 复制代码

@Slf4j
@RestController
@RequestMapping("/order")
public class OrdersController {

    @Autowired
    private OrdersService ordersService;

    @PostMapping("/submit")
    public R<String> submit(@RequestBody Orders orders){
        //比较繁琐，在service实现
        ordersService.submit(orders);
        return R.success("下单成功");
    }
}