一、Redis

具体的redis基本操作就不多再介绍，本节主要学习redis在java中的运用。

1、redis在java中的运用

具体步骤如下所示：

3.redis配置类：创建RedisTemplate对象

@Configuration
@Slf4j
public class RedisConfiguration {

    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){
        log.info("开始创建redis模板对象...");
        RedisTemplate redisTemplate = new RedisTemplate<>();
        //设置redis的连接工厂对象
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //设置redis key的序列化器
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        return redisTemplate;
    }
}

二、店铺营业状态设置

1、需求分析设计

修改营业状态同样影响客户端用户的使用



查询营业状态

2、代码设计

用户端就创建一个user的controller类管理用户端的controller就可以了，这里只写了用户端，代码也一样。

@RestController("adminShopController")
@RequestMapping("/admin/shop")
@Api(tags = "店铺相关接口")
@Slf4j
public class ShopController {

    public static final String KEY = "SHOP_STATUS";

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 设置店铺营业状态
     * @param status
     * @return
     */
    @PutMapping("/{status}")
    @ApiOperation(value = "设置店铺的营业状态")
    public Result setStatus(@PathVariable Integer status){
        log.info("设置店铺的营业状态为:{}",status == 1 ? "营业中":"打烊中");
        redisTemplate.opsForValue().set(KEY,status);
        return Result.success();
    }

    /**
     * 获取店铺的营业状态
     * @return
     */
    @GetMapping("/status")
    @ApiOperation(value = "获取店铺的营业状态")
    public Result<Integer> getStatus(){
        Integer status = (Integer) redisTemplate.opsForValue().get(KEY);
        log.info("获取到店铺的营业状态为：{}",status == 1 ? "营业中":"打烊中");
        return Result.success(status);
    }
}

3、测试

测试前需要开启redis

三、套餐管理

1、需求设计分析

这部分和前面功能大差不差，自己看下接口文档自己试着写出来就行

产品原型

2、代码设计

根据分类查询菜品也很简单，就不用在这里展示了，直接看一下套餐管理中的一些功能代码设计
SetmealController：

@RestController("adminSetmealController")
@RequestMapping("/admin/setmeal")
@Api(tags = "套餐相关接口")
@Slf4j
public class SetmealController {

    @Autowired
    private SetmealService setmealService;

    /**
     * 新增套餐
     * @param setmealDTO
     * @return
     */
    @PostMapping
    @ApiOperation("新增套餐")
    public Result save(@RequestBody SetmealDTO setmealDTO){
        setmealService.save(setmealDTO);
        return Result.success();
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @GetMapping("/page")
    @ApiOperation("分页查询")
    public Result<PageResult> page(SetmealPageQueryDTO setmealPageQueryDTO){
        PageResult pageResult = setmealService.pageQuery(setmealPageQueryDTO);
        return Result.success(pageResult);
    }

    /**
     * 删除
     * @param ids
     * @return
     */
    @DeleteMapping
    @ApiOperation("批量删除套餐")
    public Result delete(@RequestParam List<Long> ids){
        setmealService.deleteBatch(ids);
        return Result.success();
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    @ApiOperation("根据id查询套餐")
    public Result<SetmealVO> getById(@PathVariable Long id){
        SetmealVO setmealVO = setmealService.getByIdWithDish(id);
        return Result.success(setmealVO);
    }

    /**
     * 修改套餐
     * @param setmealDTO
     * @return
     */
    @PutMapping
    @ApiOperation("修改套餐")
    public Result update(@RequestBody SetmealDTO setmealDTO){
        setmealService.update(setmealDTO);
        return Result.success();
    }

    /**
     * 套餐起售停售
     * @param status
     * @param id
     * @return
     */
    @PostMapping("/status/{status}")
    @ApiOperation("套餐起售停售")
    public Result startOrStop(@PathVariable Integer status, Long id){
        setmealService.startOrStop(status, id);
        return Result.success();
    }
}

service：

public interface SetmealService {
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    List<Setmeal> list(Setmeal setmeal);

    /**
     * 根据套餐id查询菜品
     * @param id
     * @return
     */
    List<DishItemVO> getDishItemById(Long id);

    /**
     * 新增套餐
     * @param setmealDTO
     */
    void save(SetmealDTO setmealDTO);

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO);

    /**
     * 批量删除
     * @param ids
     */
    void deleteBatch(List<Long> ids);

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    SetmealVO getByIdWithDish(Long id);

    /**
     * 修改菜单
     * @param setmealDTO
     */
    void update(SetmealDTO setmealDTO);

    /**
     * 套餐停售起售
     * @param status
     * @param id
     */
    void startOrStop(Integer status, Long id);
}

SetmealServiceImpl：

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 新增套餐，同时保存套餐和菜品的管理关系
     * @param setmealDTO
     */
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //向套餐表中插入数据
        setmealMapper.insert(setmeal);
        //获取套餐生成的id
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);
            if(StatusConstant.ENABLE == setmeal.getStatus()){
                //启售中的商品不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(id -> {
            //删除套餐中的数据
            setmealMapper.deleteById(id);
            //删除套餐菜品关联表的数据
            setmealDishMapper.deleteBySetmealId(id);
        });
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        Setmeal setmeal = setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal, setmealVO);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //修改套餐表
        setmealMapper.update(setmeal);

        Long setmealId = setmealDTO.getId();
        //删除套餐和菜品关联
        setmealDishMapper.deleteBySetmealId(setmealId);
        //重新插入
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach( dish -> {
                    if(dish.getStatus() == StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
}

SetmealMapper：

@Mapper
public interface SetmealMapper {

    /**
     * 根据分类id查询套餐的数量
     * @param id
     * @return
     */
    @Select("select count(id) from setmeal where category_id = #{categoryId}")
    Integer countByCategoryId(Long id);

    /**
     * 动态条件查询套餐
     * @param setmeal
     * @return
     */
    List<Setmeal> list(Setmeal setmeal);

    /**
     * 根据套餐id查询菜品选项
     * @param setmealId
     * @return
     */
    @Select("select sd.name, sd.copies, d.image, d.description " +
            "from setmeal_dish sd left join dish d on sd.dish_id = d.id " +
            "where sd.setmeal_id = #{setmealId}")
    List<DishItemVO> getDishItemBySetmealId(Long setmealId);

    /**
     * 新增套餐
     * @param setmeal
     */
    @AutoFill(OperationType.INSERT)
    void insert(Setmeal setmeal);

    /**
     * 条件查询
     * @param setmealPageQueryDTO
     * @return
     */
    Page<SetmealVO> pageQuery(SetmealPageQueryDTO setmealPageQueryDTO);

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @Select("select * from setmeal where id = #{id}")
    Setmeal getById(Long id);

    /**
     * 根据id删除
     * @param id
     */
    @Delete("delete from setmeal where id = #{id}")
    void deleteById(Long id);

    /**
     * 修改套餐表
     * @param setmeal
     */
    @AutoFill(value = OperationType.UPDATE)
    void update(Setmeal setmeal);
}

SetmealMapper.XML：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.sky.mapper.SetmealMapper">

    <select id="list" parameterType="Setmeal" resultType="Setmeal">
        select * from setmeal
        <where>
            <if test="name != null">
                and name like concat('%',#{name},'%')
            </if>
            <if test="categoryId != null">
                and category_id = #{categoryId}
            </if>
            <if test="status != null">
                and status = #{status}
            </if>
        </where>
    </select>

    <insert id="insert" parameterType="Setmeal" useGeneratedKeys="true" keyProperty="id">
        insert into setmeal
        (category_id, name, price, status, description, image, create_time, update_time, create_user, update_user)
        values (#{categoryId}, #{name}, #{price}, #{status}, #{description}, #{image}, #{createTime}, #{updateTime},
                #{createUser}, #{updateUser})
    </insert>

    <select id="pageQuery" resultType="com.sky.vo.SetmealVO">
        select
        s.*,c.name categoryName
        from
        setmeal s
        left join
        category c
        on
        s.category_id = c.id
        <where>
            <if test="name != null">
                and s.name like concat('%',#{name},'%')
            </if>
            <if test="status != null">
                and s.status = #{status}
            </if>
            <if test="categoryId != null">
                and s.category_id = #{categoryId}
            </if>
        </where>
        order by s.create_time desc
    </select>
    <update id="update" parameterType="Setmeal">
        update setmeal
        <set>
            <if test="categoryId != null">
                category_id = #{categoryId},
            </if>
            <if test="name != null">
                name = #{name},
            </if>
            <if test="price != null">
                price = #{price},
            </if>
            <if test="status != null">
                status = #{status},
            </if>
            <if test="description != null">
                description = #{description},
            </if>
            <if test="image != null">
                image = #{image},
            </if>
            <if test="updateTime != null">
                update_time = #{updateTime},
            </if>
            <if test="updateUser != null">
                update_user = #{updateUser}
            </if>
        </set>
        where id = #{id}
    </update>
</mapper>

这里设计到一个套餐和菜品的关联表，即套餐中包含哪些菜品
SetmealdishMapper：

@Mapper
public interface SetmealDishMapper {

    /**
     *
     * 根据菜品id查询套餐id
     * @param dishIds
     * @return
     */
    List<Long> getSetmealDishIdsByDishIds(List<Long> dishIds);

    /**
     * 保存套餐菜品关系
     * @param setmealDishes
     */
    void insertBatch(List<SetmealDish> setmealDishes);
}

SetmealdishMapper.XML：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.sky.mapper.SetmealDishMapper">
    <select id = "getSetmealDishIdsByDishIds" resultType="java.lang.Long">
        select setmeal_id from setmeal_dish where dish_id in
        <foreach collection="dishIds" item="dishId" separator="," open="(" close=")">
            #{dishId}
        </foreach>
    </select>

    <insert id="insertBatch" parameterType="list">
        insert into setmeal_dish
        (setmeal_id,dish_id,name,price,copies)
        values
        <foreach collection="setmealDishes" item="sd" separator=",">
            (#{sd.setmealId},#{sd.dishId},#{sd.name},#{sd.price},#{sd.copies})
        </foreach>
    </insert>
</mapper>

3、测试

点击添加菜品，可以看到菜品回显，根据分类查询菜品

填写完表单数据，点击添加保存。

查询数据库

以及套餐菜品关系表

分类查询数据：

点击修改按钮能回显数据

修改部分信息，以及起售菜品


测试删除功能

删除成功