Java Web项目—餐饮管理系统Day09-用户端开发（二）

文章目录

- - 1. 地址簿管理
  - - 1-1. 新增地址
    - 1-2 查询当前用户的地址簿
    - 1-3. 更新默认地址
    - 1-4. 获取默认地址
    - 1-5. 修改地址
  - 2. 订单管理
  - - 2-1. 表结构
    - 2-2 提交订单

本章节主要完成地址簿的管理以及订单管理, 同时完善系统的部分细节, Reggie TakeAway 系统篇章基础篇告一段落.

1. 地址簿管理

地址簿记录了每个用户的地址信息, 每个用户可以设置多个地址, 但默认地址有且仅有一个.
实体类如下:

@Data
public class AddressBook implements Serializable {private static final long serialVersionUID = 1L;private Long id;private Long userId;            //用户idprivate String consignee;       //收货人private String phone;           //手机号private String sex;             //性别 0 女 1 男private String provinceCode;    //省级区划编号private String provinceName;    //省级名称private String cityCode;        //市级区划编号private String cityName;        //市级名称private String districtCode;    //区级区划编号private String districtName;    //区级名称private String detail;          //详细地址private String label;           //标签private Integer isDefault;      //是否默认 0 否 1是@TableField(fill = FieldFill.INSERT)private LocalDateTime createTime;@TableField(fill = FieldFill.INSERT_UPDATE)private LocalDateTime updateTime;@TableField(fill = FieldFill.INSERT)private Long createUser;@TableField(fill = FieldFill.INSERT_UPDATE)private Long updateUser;private Integer isDeleted;      //是否删除
}

为他建立对应的 mapper 和 service 层.

1-1. 新增地址

POST

@RestController
@RequestMapping("addressBook")
@Slf4j
public class AddressBookController {@Autowiredprivate AddressBookService addressBookService;@PostMappingpublic R<String> add(@RequestBody AddressBook address){log.info("新增地址: {}", address);Long userId = BaseContext.getId();address.setUserId(userId);address.setIsDefault(0);addressBookService.save(address);return R.success("地址新增成功");}
}

1-2 查询当前用户的地址簿

@GetMapping("list")
public R<List<AddressBook>> list(){Long userId = BaseContext.getId();log.info("查询当前用户所有的地址信息: {}", userId);List<AddressBook> books = addressBookService.listByUser(userId);return R.success(books);
}// AddressBookServiceImpl
@Override
public List<AddressBook> listByUser(Long userId) {LambdaQueryWrapper<AddressBook> wrapper = new LambdaQueryWrapper<>();wrapper.eq(AddressBook::getUserId, userId);wrapper.orderByDesc(AddressBook::getUpdateTime);return this.list(wrapper);
}

1-3. 更新默认地址

设置默认地址, 注意需要先把原默认地址取消, 这里有一个 trick, 就是如果一个实体类的字段为空, 那么在更新时该字段不会被写入到数据库中.

@PutMapping("default")
public R<String> defAddr(@RequestBody AddressBook newBook){log.info("设置默认地址");// 假如已经存在一个默认地址, 则先把它设为0LambdaQueryWrapper<AddressBook> bookWrapper = new LambdaQueryWrapper<>();bookWrapper.eq(AddressBook::getIsDefault, 1);AddressBook bookNoDefault = new AddressBook();bookNoDefault.setIsDefault(0);addressBookService.update(bookNoDefault, bookWrapper);newBook.setIsDefault(1);addressBookService.updateById(newBook);return R.success("设置默认地址成功");
}

1-4. 获取默认地址

@GetMapping("default")
public R<AddressBook> getDefAddr(){log.info("获取默认地址");LambdaQueryWrapper<AddressBook> bookWrapper = new LambdaQueryWrapper<>();bookWrapper.eq(AddressBook::getIsDefault, 1);bookWrapper.eq(AddressBook::getUserId, BaseContext.getId());AddressBook addressBook = addressBookService.getOne(bookWrapper);if (addressBook == null)return null;elsereturn R.success(addressBook);
}

1-5. 修改地址

地址信息回显:

@GetMapping("{addrId}")
public R<AddressBook> getById(@PathVariable Long addrId){log.info("获取地址: {}", addrId);return R.success(addressBookService.getById(addrId));
}

更新表格:

@PutMapping
public R<String> update(@RequestBody AddressBook book){log.info("修改地址: {}", book);addressBookService.updateById(book);return R.success("修改成功");
}

2. 订单管理

2-1. 表结构

Orders 和 OrderDetail
第一个存放订单的基本信息, 包括订单号订单所属用户订单配送地址等等

@Data
public class Orders implements Serializable {private static final long serialVersionUID = 1L;private Long id;private String number;                  // 订单号private Integer status;                 // 订单状态 1待付款，2待派送，3已派送，4已完成，5已取消private Long userId;                    // 下单用户idprivate Long addressBookId;             // 地址idprivate LocalDateTime orderTime;        // 下单时间private LocalDateTime checkoutTime;     // 结账时间private Integer payMethod;              // 支付方式 1 微信, 2 支付宝private BigDecimal amount;              // 实收金额private String remark;                  // 备注private String userName;                // 用户名private String phone;                   // 手机号private String address;                 // 地址private String consignee;               // 收货人
}

第二个是订单明细表, 它以订单号为关联键值, 存放该订单中包含的所有菜品或套餐的信息

@Data
public class OrderDetail implements Serializable {private static final long serialVersionUID = 1L;private Long id;private String name;    //名称private Long orderId;   //订单idprivate Long dishId;    //菜品idprivate Long setmealId; //套餐idprivate String dishFlavor;      //口味private Integer number;         //数量private BigDecimal amount;      //金额private String image;           //图片
}

为他们创建 service 和 mapper.

2-2 提交订单

如下为请求信息:

请求 URL:
http://localhost:8080/order/submit
请求方法:
POST
请求体:
{"remark": "","payMethod": 1,"addressBookId": "1746045643976040449"
}

订单生成的步骤包括:

获取当前登录用户
获取用户地址信息
获取购物车菜品信息
创建订单实体
保存订单明细表到数据库
清空购物车
填充订单实体的必要字段, 保存订单信息到数据库

如下为 controller 层的处理方法:

@RestController
@RequestMapping("order")
@Slf4j
public class OrderController {@Autowiredprivate OrdersService ordersService;@PostMapping("submit")public R<String> submit(@RequestBody Orders orders) {log.info("用户下单: {}", orders);ordersService.submit(orders);return R.success("下单成功");}
}

OrdersServiceImpl.submit 方法如下:

@Override
public void submit(Orders orders) {Long userId = BaseContext.getId();User user = userService.getById(userId);Long addressBookId = orders.getAddressBookId();AddressBook addressBook = addressBookService.getById(addressBookId);if (addressBook == null)throw new BusinessException("地址信息有误, 无法下单");Long orderId = IdWorker.getId();orders.setId(orderId);int amount = orderDetailService.saveCurrentShoppingCart(orderId);orders.setOrderTime(LocalDateTime.now());orders.setCheckoutTime(LocalDateTime.now());orders.setStatus(2);orders.setAmount(new BigDecimal(amount));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()));this.save(orders);
}

保存订单明细表到数据库的代码如下:

@Transactional
@Override
public Integer saveCurrentShoppingCart(Long orderId) {// 将当前用户购物车内的套餐或菜品全部存入订单明细表中, 并与订单号 orderId 关联// 返回购物车内商品总金额 amount, 同时清除购物车.AtomicInteger amount = new AtomicInteger(0);Long userId = BaseContext.getId();LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();wrapper.eq(ShoppingCart::getUserId, userId);List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);if (shoppingCarts==null || shoppingCarts.size()==0)throw new BusinessException("购物车为空, 无法下单");for (ShoppingCart cart: shoppingCarts){OrderDetail detail = new OrderDetail();BeanUtils.copyProperties(cart, detail);detail.setOrderId(orderId);amount.addAndGet(detail.getAmount().multiply(new BigDecimal(detail.getNumber())).intValue());this.save(detail);}shoppingCartService.remove(wrapper);return amount.get();
}