瑞吉外卖Day5

新增套餐

将新增页面录入的套餐信息插入到setmeal表，同时向setmeal_dish表插入套餐和菜品关联数据。

新增套餐涉及到两个表:

setmeal 套餐表
setmeal_dish 套餐菜品关系表

一、类和接口的基本结构

实体类SetmealDish
DTO SetmealDto
Mapper接口 SetmealDishMapper
业务层接口 SetmealDishService
业务层实现类SetmealDishServicelmpl
控制层 SetmealController

二、前端页面交互过程

页面（backend/page/combo/add.html)发送ajax请求，请求服务端获取套餐分类数据并展示到下拉框中
页面发送ajax请求，请求服务端获取菜品分类数据并展示到添加菜品窗口中
页面发送ajax请求，请求服务端，根据菜品分类查询对应的菜品数据并展示到添加菜品窗口中
页面发送请求进行图片上传，请求服务端将图片保存到服务器
页面发送请求进行图片下载，将上传的图片进行回显
点击保存按钮，发送ajax请求，将套餐相关数据以json形式提交到服务端

三、代码实现

1.实体类SetmealDish

package com.study.pojo;

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

/**
 * 套餐菜品关系
 */
@Data
public class SetmealDish implements Serializable {
    
    

    private static final long serialVersionUID = 1L;

    private Long id;


    //套餐id
    private Long setmealId;


    //菜品id
    private Long dishId;


    //菜品名称 （冗余字段）
    private String name;

    //菜品原价
    private BigDecimal price;

    //份数
    private Integer copies;


    //排序
    private Integer sort;


    @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;


    //是否删除
    private Integer isDeleted;
}

2.Mapper接口 SetmealDishMapper

package com.study.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.study.pojo.SetmealDish;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface SetmealDishMapper extends BaseMapper<SetmealDish> {

3.业务层接口 SetmealDishService

package com.study.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.study.pojo.SetmealDish;

public interface SetmealDishService extends IService<SetmealDish> {
    
    
}

4.业务层实现类SetmealDishServicelmpl

package com.study.Service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.study.Service.SetmealDishService;
import com.study.mapper.SetmealDishMapper;
import com.study.pojo.SetmealDish;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j
public class SetmealDishServiceimpl extends ServiceImpl<SetmealDishMapper, SetmealDish> implements SetmealDishService {
    
    
}

5.控制层 SetmealController

package com.study.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.study.Dto.SetmealDto;
import com.study.Service.CategoryService;
import com.study.Service.SetmealDishService;
import com.study.Service.SetmealService;
import com.study.common.R;
import com.study.pojo.Category;
import com.study.pojo.Setmeal;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

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

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

    @Autowired
    private SetmealService setmealService;

    /**
     * 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");
    }
}

分页查询

一、前端和服务端交互过程

页面(backend/page/combo/list.html)发送ajax请求，将分页查询参数(page、pageSize、name)提交到服务端，获取分页数据页面发送请求
请求服务端进行图片下载，用于页面图片展示开发套餐信息分页查询功能

二、代码实现

SetmealController类中增添以下代码

 /**
     * 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){
    
    
        Page<Setmeal> pageInfo=new Page<>();
        Page<SetmealDto> dtoPage=new Page<>();

        LambdaQueryWrapper<Setmeal> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.like(name!=null,Setmeal::getName,name);
        queryWrapper.orderByDesc(Setmeal::getUpdateTime);
        setmealService.page(pageInfo,queryWrapper);

        BeanUtils.copyProperties(pageInfo,dtoPage,"records");
        List<Setmeal> records=pageInfo.getRecords();
        List<SetmealDto> list=records.stream().map((item)->{
    
    
            SetmealDto setmealDto=new SetmealDto();
            BeanUtils.copyProperties(item,setmealDto);
            Long categoryId = item.getCategoryId();
            Category category=categoryService.getById(categoryId);
            if(category!=null){
    
    
                String categoryName=category.getName();
                setmealDto.setCategoryName(categoryName);
            }
            return setmealDto;
        }).collect(Collectors.toList());
        dtoPage.setRecords(list);
        return R.success(dtoPage);
    }

删除功能

一、前后端交互过程

1、删除单个套餐时，页面发送ajax请求，根据套餐id删除对应套餐
Request URL: http://localhost:8080/setmeal?ids=1414118011303899137

Request Method: DELETE

2、删除多个套餐时，页面发送ajax请求，根据提交的多个套餐id删除对应套餐
Request URL: http://localhost:8080/setmeal?ids=1414131634248101890,1414118011303899137
Request Method: DELETE

二、代码开发