一、导入用户地址簿相关功能代码

1 需求分析

2 数据模型

3 导入功能代码

3.1 实体AddressBook

3.2 Mapper接口AddressBookMapper

3.3 业务接口层AddressBookService

3.4 业务接口实现类AddressBookServiceImpl

3.5 控制层AddressBookController

4 功能测试

二、菜品展示

1 需求分析

2 代码开发

2.1 main.js

2.2 DishController

2.3 SetmealController

3 功能测试

三、购物车

1 需求分析

2 数据模型

3 代码开发

3.1 实体类ShoppingCart

3.2 Mapper接口ShoppingCartMapper

3.3 业务层接口ShoppingCartService

3.4 业务层实现类ShoppingCartServiceImpl

3.5 控制层ShoppingCartController

3.6 main.js

3.7 ShoppingCartController 控制层

4 功能测试

四、用户下单

1 需求分析

2 数据模型

3 代码开发

3.1 订单实体Orders

3.2 订单详细实体OrderDetail

3.3 Mapper接口类OrderMapper

3.4 Mapper接口类OrderDetailMapper

3.5 业务层接口OrderService

3.6 业务层接口OrderDetailService

3.7 业务层接口OrderServiceImpl

3.8 业务层接口OrderDetailServiceImpl

3.9 业务层接口OrderController

3.10 业务层接口OrderDetailController

3.11 OrderController

3.12 OrderService

3.13 OrderServiceImpl

4 功能测试

前言：导入用户地址簿相关功能代码、菜品展示、购物车、下单

一、导入用户地址簿相关功能代码

1 需求分析

2 数据模型

3 导入功能代码

3.1 实体AddressBook

package com.runa.reggie.entity;

import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;
import java.io.Serializable;
import java.time.LocalDateTime;

/**
 * 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;
}

3.2 Mapper接口AddressBookMapper

package com.runa.reggie.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.runa.reggie.entity.AddressBook;
import org.apache.ibatis.annotations.Mapper;

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

3.3 业务接口层AddressBookService

package com.runa.reggie.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.runa.reggie.entity.AddressBook;

public interface AddressBookService extends IService<AddressBook> {
}

3.4 业务接口实现类AddressBookServiceImpl

package com.runa.reggie.service.impl;


import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.runa.reggie.entity.AddressBook;
import com.runa.reggie.mapper.AddressBookMapper;
import com.runa.reggie.service.AddressBookService;
import org.springframework.stereotype.Service;

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

3.5 控制层AddressBookController

package com.runa.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.runa.reggie.common.BaseContext;
import com.runa.reggie.common.R;
import com.runa.reggie.entity.AddressBook;
import com.runa.reggie.service.AddressBookService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * 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) {
        addressBook.setUserId(BaseContext.getCurrentId());
        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));
    }
}

4 功能测试

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二、菜品展示

1 需求分析

2 代码开发

2.1 main.js

修改记得清理浏览器缓存

//获取所有的菜品分类
function categoryListApi() {
    return $axios({
      'url': '/category/list',
      'method': 'get',
    })
  }

//获取菜品分类对应的菜品
function dishListApi(data) {
    return $axios({
        'url': '/dish/list',
        'method': 'get',
        params:{...data}
    })
}

//获取菜品分类对应的套餐
function setmealListApi(data) {
    return $axios({
        'url': '/setmeal/list',
        'method': 'get',
        params:{...data}
    })
}

//获取购物车内商品的集合
function cartListApi(data) {
    return $axios({
        // 'url': '/shoppingCart/list',
        'url': '/front/cartData.json',
        'method': 'get',
        params:{...data}
    })
}

//购物车中添加商品
function  addCartApi(data){
    return $axios({
        'url': '/shoppingCart/add',
        'method': 'post',
        data
      })
}

//购物车中修改商品
function  updateCartApi(data){
    return $axios({
        'url': '/shoppingCart/sub',
        'method': 'post',
        data
      })
}

//删除购物车的商品
function clearCartApi() {
    return $axios({
        'url': '/shoppingCart/clean',
        'method': 'delete',
    })
}

//获取套餐的全部菜品
function setMealDishDetailsApi(id) {
    return $axios({
        'url': `/setmeal/dish/${id}`,
        'method': 'get',
    })
}

2.2 DishController

package com.runa.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.runa.reggie.common.R;
import com.runa.reggie.dto.DishDto;
import com.runa.reggie.entity.Category;
import com.runa.reggie.entity.Dish;
import com.runa.reggie.entity.DishFlavor;
import com.runa.reggie.service.CategoryService;
import com.runa.reggie.service.DishFlavorService;
import com.runa.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;
    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
      return R.success("新增菜品成功");
    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        // 构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        // 添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        // 添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        // 对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();// 分类id
            Category category = categoryService.getById(categoryId);
            String categoryName = category.getName();
            dishDto.setCategoryName(categoryName);
            return dishDto;
        }).collect(Collectors.toList());


        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }


    /**
     * 根据ID 查询菜品和对应口味信息 回显
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        log.info("要查询显示的菜品信息是：{}",id);
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        return R.success("修改菜品成功");
    }




//    /**
//     * 根据条件查询对于菜品数据
//     * @param dish
//     * @return
//     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//
//        // 构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper =new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        // 添加条件，查询状态为1（起售状态）的菜品
//        queryWrapper.eq(Dish::getStatus,1);
//        // 天添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }
//}

    /**
     * 根据条件查询对于菜品数据
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){

        // 构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper =new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        // 添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        // 天添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        List<DishDto> dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();// 分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            // 当前菜品的id
            Long dishId = item.getId();

            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

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


        return R.success(dishDtoList);
    }
}

2.3 SetmealController

package com.runa.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.runa.reggie.common.R;
import com.runa.reggie.dto.SetmealDto;
import com.runa.reggie.entity.Category;
import com.runa.reggie.entity.Setmeal;
import com.runa.reggie.service.CategoryService;
import com.runa.reggie.service.SetmealDishService;
import com.runa.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/setmeal")
@Slf4j
public class SetmealController {

    @Autowired
    private SetmealService setmealService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * 新增套餐
     * @param setmealDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody SetmealDto setmealDto){
        log.info("套餐信息：{}",setmealDto);

        setmealService.saveWithDish(setmealDto);

        return R.success("新增套餐成功");
    }

    /**
     * 套餐分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        //分页构造器对象
        Page<Setmeal> pageInfo = new Page<>(page,pageSize);
        Page<SetmealDto> dtoPage = new Page<>();

        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件，根据name进行like模糊查询
        queryWrapper.like(name != null,Setmeal::getName,name);
        //添加排序条件，根据更新时间降序排列
        queryWrapper.orderByDesc(Setmeal::getUpdateTime);

        setmealService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dtoPage,"records");
        List<Setmeal> records = pageInfo.getRecords();

        List<SetmealDto> list = records.stream().map((item) -> {
            SetmealDto setmealDto = new SetmealDto();
            //对象拷贝
            BeanUtils.copyProperties(item,setmealDto);
            //分类id
            Long categoryId = item.getCategoryId();
            //根据分类id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                //分类名称
                String categoryName = category.getName();
                setmealDto.setCategoryName(categoryName);
            }
            return setmealDto;
        }).collect(Collectors.toList());

        dtoPage.setRecords(list);
        return R.success(dtoPage);
    }

    /**
     * 删除套餐
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        log.info("ids:{}",ids);

        setmealService.removeWithDish(ids);

        return R.success("套餐数据删除成功");
    }

    /**
     * 根据条件查询套餐数据
     * @param setmeal
     * @return
     */
    @GetMapping("/list")
    public R<List<Setmeal>> list(Setmeal setmeal){
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(setmeal.getCategoryId() != null,Setmeal::getCategoryId,setmeal.getCategoryId());
        queryWrapper.eq(setmeal.getStatus() != null,Setmeal::getStatus,setmeal.getStatus());
        queryWrapper.orderByDesc(Setmeal::getUpdateTime);
        List<Setmeal> list = setmealService.list(queryWrapper);
        return R.success(list);

    }

}

3 功能测试

三、购物车

1 需求分析

2 数据模型

3 代码开发

3.1 实体类ShoppingCart

package com.runa.reggie.entity;

import lombok.Data;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDateTime;

/**
 * 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;
}

3.2 Mapper接口ShoppingCartMapper

package com.runa.reggie.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.runa.reggie.entity.ShoppingCart;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;

@Mapper
public interface ShoppingCartMapper extends BaseMapper<ShoppingCart> {

}

3.3 业务层接口ShoppingCartService

package com.runa.reggie.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.runa.reggie.entity.ShoppingCart;

public interface ShoppingCartService extends IService<ShoppingCart> {

}

3.4 业务层实现类ShoppingCartServiceImpl

package com.runa.reggie.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.runa.reggie.entity.ShoppingCart;
import com.runa.reggie.mapper.ShoppingCartMapper;
import com.runa.reggie.service.ShoppingCartService;
import org.springframework.stereotype.Service;

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

}

3.5 控制层ShoppingCartController

package com.runa.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.runa.reggie.common.BaseContext;
import com.runa.reggie.common.R;
import com.runa.reggie.entity.ShoppingCart;
import com.runa.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 购物车
 */
@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

 
}

3.6 main.js

修改记得清理浏览器缓存

//获取所有的菜品分类
function categoryListApi() {
    return $axios({
      'url': '/category/list',
      'method': 'get',
    })
  }

//获取菜品分类对应的菜品
function dishListApi(data) {
    return $axios({
        'url': '/dish/list',
        'method': 'get',
        params:{...data}
    })
}

//获取菜品分类对应的套餐
function setmealListApi(data) {
    return $axios({
        'url': '/setmeal/list',
        'method': 'get',
        params:{...data}
    })
}

//获取购物车内商品的集合
function cartListApi(data) {
    return $axios({
        'url': '/shoppingCart/list',
        // 'url': '/front/cartData.json',
        'method': 'get',
        params:{...data}
    })
}

//购物车中添加商品
function  addCartApi(data){
    return $axios({
        'url': '/shoppingCart/add',
        'method': 'post',
        data
      })
}

//购物车中修改商品
function  updateCartApi(data){
    return $axios({
        'url': '/shoppingCart/sub',
        'method': 'post',
        data
      })
}

//删除购物车的商品
function clearCartApi() {
    return $axios({
        'url': '/shoppingCart/clean',
        'method': 'delete',
    })
}

//获取套餐的全部菜品
function setMealDishDetailsApi(id) {
    return $axios({
        'url': `/setmeal/dish/${id}`,
        'method': 'get',
    })
}

3.7 ShoppingCartController 控制层

package com.runa.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.runa.reggie.common.BaseContext;
import com.runa.reggie.common.R;
import com.runa.reggie.entity.ShoppingCart;
import com.runa.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

/**
 * 购物车
 */
@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据:{}",shoppingCart);

        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);

        if(dishId != null){
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);

        }else{
            //添加到购物车的是套餐
            queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
        }

        //查询当前菜品或者套餐是否在购物车中
        //SQL:select * from shopping_cart where user_id = ? and dish_id/setmeal_id = ?
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);

        if(cartServiceOne != null){
            //如果已经存在，就在原来数量基础上加一
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number + 1);
            shoppingCartService.updateById(cartServiceOne);
        }else{
            //如果不存在，则添加到购物车，数量默认就是一
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }

        return R.success(cartServiceOne);
    }

    /**
     * 查看购物车
     * @return
     */
    @GetMapping("/list")
    public R<List<ShoppingCart>> list(){
        log.info("查看购物车...");

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

        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        return R.success(list);
    }

    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){
        //SQL:delete from shopping_cart where user_id = ?

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

        shoppingCartService.remove(queryWrapper);

        return R.success("清空购物车成功");
    }
}

4 功能测试

四、用户下单

1 需求分析

2 数据模型

3 代码开发

3.1 订单实体Orders

package com.runa.reggie.entity;

import lombok.Data;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDateTime;

/**
 * 订单
 */
@Data
public class Orders implements Serializable {

    private static final long serialVersionUID = 1L;

    private Long id;

    //订单号
    private String number;

    //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 Integer status;


    //下单用户id
    private Long userId;

    //地址id
    private Long addressBookId;


    //下单时间
    private LocalDateTime orderTime;


    //结账时间
    private LocalDateTime checkoutTime;


    //支付方式 1微信，2支付宝
    private Integer payMethod;


    //实收金额
    private BigDecimal amount;

    //备注
    private String remark;

    //用户名
    private String userName;

    //手机号
    private String phone;

    //地址
    private String address;

    //收货人
    private String consignee;
}

3.2 订单详细实体OrderDetail

package com.runa.reggie.entity;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import lombok.Data;
import java.io.Serializable;
import java.math.BigDecimal;

/**
 * 订单明细
 */
@Data
public class OrderDetail implements Serializable {

    private static final long serialVersionUID = 1L;

    private Long id;

    //名称
    private String name;

    //订单id
    private Long orderId;


    //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;
}

3.3 Mapper接口类OrderMapper

package com.runa.reggie.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.runa.reggie.entity.Orders;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface OrderMapper extends BaseMapper<Orders> {
}

3.4 Mapper接口类OrderDetailMapper

package com.runa.reggie.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.runa.reggie.entity.OrderDetail;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface OrderDetailMapper extends BaseMapper<OrderDetail> {
}

3.5 业务层接口OrderService

package com.runa.reggie.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.runa.reggie.entity.Orders;

public interface OrderService extends IService<Orders> {
}

3.6 业务层接口OrderDetailService

package com.runa.reggie.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.runa.reggie.entity.OrderDetail;

public interface OrderDetailService extends IService<OrderDetail> {
}

3.7 业务层接口OrderServiceImpl

package com.runa.reggie.service.impl;


import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.runa.reggie.entity.*;
import com.runa.reggie.mapper.OrderMapper;
import com.runa.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;



@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

}

3.8 业务层接口OrderDetailServiceImpl

package com.runa.reggie.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.runa.reggie.entity.OrderDetail;
import com.runa.reggie.mapper.OrderDetailMapper;
import com.runa.reggie.service.OrderDetailService;
import org.springframework.stereotype.Service;

@Service
public class OrderDetailServiceImpl extends ServiceImpl<OrderDetailMapper, OrderDetail> implements OrderDetailService {
}

3.9 业务层接口OrderController

package com.runa.reggie.controller;

import com.runa.reggie.common.R;
import com.runa.reggie.entity.Orders;
import com.runa.reggie.service.OrderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 订单
 */
@Slf4j
@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private OrderService orderService;

}

3.10 业务层接口OrderDetailController

package com.runa.reggie.controller;

import com.runa.reggie.service.OrderDetailService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/**
 * 订单明细
 */
@Slf4j
@RestController
@RequestMapping("/orderDetail")
public class OrderDetailController {

    @Autowired
    private OrderDetailService orderDetailService;

}

3.11 OrderController

package com.runa.reggie.controller;

import com.runa.reggie.common.R;
import com.runa.reggie.entity.Orders;
import com.runa.reggie.service.OrderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 订单
 */
@Slf4j
@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private OrderService orderService;
    /**
     * 用户下单
     * @param orders
     * @return
     */
    @PostMapping("/submit")
    public R<String> submit(@RequestBody Orders orders){
        log.info("订单数据：{}",orders);
        orderService.submit(orders);
        return R.success("下单成功");
    }

}

3.12 OrderService

package com.runa.reggie.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.runa.reggie.entity.Orders;

public interface OrderService extends IService<Orders> {
    /**
     * 用户下单
     * @param orders
     */
    public void submit(Orders orders);
}

3.13 OrderServiceImpl

package com.runa.reggie.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.runa.reggie.common.BaseContext;
import com.runa.reggie.common.CustomException;
import com.runa.reggie.entity.*;
import com.runa.reggie.mapper.OrderMapper;
import com.runa.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;


@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw new CustomException("用户地址信息有误，不能下单");
        }

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

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        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
        this.save(orders);

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

        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

}