瑞吉外卖（28）- 用户下单功能开发（功能完结篇）

需求分析

数据模型

订单表 - orders

订单明细表 - order_detail

代码开发

梳理交互过程

分析前端请求

去结算"页面正常

获得默认地址信息

“去支付”请求

搭建框架

实体类Orders.java

package com.taotao.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;
}

实体类OrderDetail.java

package com.taotao.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;
}

OrderMapper.java

package com.taotao.reggie.mapper;

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

/**
 * create by 刘鸿涛
 * 2022/9/29 20:40
 */
@SuppressWarnings({"all"})
@Mapper
public interface OrderMapper extends BaseMapper<Orders> {
    
}

OrderDetailMapper.java

package com.taotao.reggie.mapper;

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

/**
 * create by 刘鸿涛
 * 2022/9/29 20:41
 */
@SuppressWarnings({"all"})
@Mapper
public interface OrderDetailMapper extends BaseMapper<OrderDetail> {
}

OrderService.java

package com.taotao.reggie.service;

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

/**
 * create by 刘鸿涛
 * 2022/9/29 20:42
 */
@SuppressWarnings({"all"})
public interface OrderService extends IService<Orders> {
}

OrderDetailService.java

package com.taotao.reggie.service;

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

/**
 * create by 刘鸿涛
 * 2022/9/29 20:43
 */
@SuppressWarnings({"all"})
public interface OrderDetailService extends IService<OrderDetail> {
}

OrderServiceImpl.java

package com.taotao.reggie.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.taotao.reggie.entity.Orders;
import com.taotao.reggie.mapper.OrderMapper;
import com.taotao.reggie.service.OrderService;
import org.springframework.stereotype.Service;

/**
 * create by 刘鸿涛
 * 2022/9/29 20:43
 */
@SuppressWarnings({"all"})
@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    
}

OrderDetailServiceImpl.java

package com.taotao.reggie.service.impl;

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

/**
 * create by 刘鸿涛
 * 2022/9/29 20:45
 */
@SuppressWarnings({"all"})
@Service
public class OrderDetailServiceImpl extends ServiceImpl<OrderDetailMapper, OrderDetail> implements OrderDetailService {
}

OrderController.java

package com.taotao.reggie.controller;

import com.taotao.reggie.service.OrderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * create by 刘鸿涛
 * 2022/9/29 20:54
 */
@SuppressWarnings({"all"})
@RestController
@Slf4j
@RequestMapping("/order")
public class OrderController {
    @Autowired
    private OrderService orderService;
}

OrderDetailController.java

package com.taotao.reggie.controller;

import com.taotao.reggie.service.OrderDetailService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * create by 刘鸿涛
 * 2022/9/29 20:57
 */
@SuppressWarnings({"all"})
@RestController
@RequestMapping("orderDetail")
@Slf4j
public class OrderDetailController {
    private OrderDetailService orderDetailService;
}

编写核心代码

分析返回数据

因为返回的三个属性都在orders表内，所以，我们可以使用orders来接收返回值，但是注意，前端返回来的数据是json格式，所以后端我们使用@RequestBody注解

OrderController.java

package com.taotao.reggie.controller;

import com.taotao.reggie.common.R;
import com.taotao.reggie.entity.Orders;
import com.taotao.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;

/**
 * create by 刘鸿涛
 * 2022/9/29 20:54
 */
@SuppressWarnings({"all"})
@RestController
@Slf4j
@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");
    }
}

OrderService.java

package com.taotao.reggie.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.taotao.reggie.entity.Orders;
import org.springframework.web.bind.annotation.PostMapping;

/**
 * create by 刘鸿涛
 * 2022/9/29 20:42
 */
@SuppressWarnings({"all"})
public interface OrderService extends IService<Orders> {
    /**
     * 用户下单
     * @param orders
     */
    public void submit(Orders orders);
}

OrderServiceImpl.java

package com.taotao.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.taotao.reggie.common.BaseContext;
import com.taotao.reggie.common.CustomException;
import com.taotao.reggie.entity.*;
import com.taotao.reggie.mapper.OrderMapper;
import com.taotao.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

        //原子类
        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);
    }
}

功能测试

扩展资料

md5加密

数字摘要算法

RSA加密