缓存Cache

package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品相关接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据Id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("根据分类id查询菜品，分类id为{}", categoryId);
        //1.如果缓存中有数据
        String key = "dish_" + categoryId;
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if (list != null && list.size() > 0) {
            return Result.success(list);
        }
        //2.如果缓存中没有数据,先查询数据库数据,在存储到缓存中
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        list = dishService.list(dish);
        redisTemplate.opsForValue().set(key, list);

        return Result.success(list);

    }


}

package com.sky.controller.admin;

import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;

@RestController
@RequestMapping("/admin/dish")
@Slf4j
@Api(tags = "菜品相关接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDTO
     * @return
     */
    @PostMapping
    @ApiOperation("新增菜品")
    public Result save(@RequestBody DishDTO dishDTO) {
        log.info("新增菜品，菜品数据：{}", dishDTO);
        dishService.saveWithFlavor(dishDTO);
        //删除缓存数据
        String key = "dish_" + dishDTO.getCategoryId();
        cleanCache(key);

        return Result.success();

    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @GetMapping("/page")
    @ApiOperation("分页查询菜品")
    public Result<PageResult> page(DishPageQueryDTO dishPageQueryDTO) {
        log.info("分页查询菜品，参数为：{}", dishPageQueryDTO);
        PageResult pageResult = dishService.pageQuery(dishPageQueryDTO);
        return Result.success(pageResult);
    }

    /**
     * 根据id查询菜品
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    @ApiOperation("根据id查询菜品")
    public Result<DishVO> getById(@PathVariable Long id) {
        log.info("根据id查询菜品，id为{}", id);
        DishVO dishVO = dishService.getByIdWithFlavor(id);
        return Result.success(dishVO);
    }

    /**
     * 根据categoryId分类Id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据categoryId分类Id查询菜品")
    public Result<List<Dish>> list(Long categoryId) {
        log.info("根据分类id查询菜品，分类id为{}", categoryId);
        List<Dish> list = dishService.listByCategoryId(categoryId);
        return Result.success(list);
    }


    /**
     * 修改菜品
     *
     * @param dishDTO
     * @return
     */
    @PutMapping
    @ApiOperation("修改菜品")
    public Result update(@RequestBody DishDTO dishDTO) {
        log.info("修改菜品，菜品数据为：{}", dishDTO);
        dishService.updateWithFlavor(dishDTO);
        //清理缓存数据
        cleanCache("dish_*");
        return Result.success();
    }


    /**
     * 删除菜品 1,2,3
     *
     * @param ids
     * @return
     */
    @DeleteMapping()
    @ApiOperation("删除菜品")
    public Result deleteByIds(@RequestParam List<Long> ids) {
        log.info("删除菜品，id为：{}", ids);
        dishService.deleteByIds(ids);
        //清理缓存数据
        cleanCache("dish_*");
        return Result.success();
    }

    @PostMapping("/status/{status}")
    @ApiOperation("起售停售菜品")
    public Result startOrStop(@PathVariable Integer status, Long id) {
        log.info("起售停售菜品，状态为：{}，id为：{}", status, id);
        dishService.startOrStop(status, id);
        //清理缓存数据
        cleanCache("dish_*");
        return Result.success();
    }


    //清理缓存数据
    private void cleanCache(String key) {
        Set keys = redisTemplate.keys(key);
        redisTemplate.delete(keys);
    }


}

1.Spring Cache----------注解用法类似Transaction

package com.sky.controller.admin;

import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@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")
    @CacheEvict(cacheNames = "setmealCache", key = "#setmeal.categoryId")
    public Result save(@RequestBody SetmealDTO setmealDTO) {
        log.info("新增套餐：{}", setmealDTO);
        setmealService.saveWithDish(setmealDTO);
        return Result.success();
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @GetMapping("/page")
    @ApiOperation("套餐分页查询")
    public Result<PageResult> page(SetmealPageQueryDTO setmealPageQueryDTO) {
        log.info("套餐分页查询，参数为：{}", setmealPageQueryDTO);
        PageResult pageResult = setmealService.pageQuery(setmealPageQueryDTO);
        return Result.success(pageResult);
    }

    /**
     * 删除套餐
     * @param ids
     * @return
     */
    @DeleteMapping
    @ApiOperation("批量删除套餐")
    @CacheEvict(cacheNames = "setmealCache", allEntries = true)
    public Result delete(@RequestParam List<Long> ids) {
        log.info("批量删除套餐，ids为：{}", ids);
        setmealService.deleteByIds(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) {
        log.info("根据id查询套餐：{}", id);
        SetmealVO setmealVO = setmealService.getById(id);
        return Result.success(setmealVO);
    }

    /**
     * 修改套餐状态
     * @param setmealDTO
     * @return
     */
    @PutMapping
    @ApiOperation("修改套餐")
    @CacheEvict(cacheNames = "setmealCache",allEntries = true)
    public Result update(@RequestBody SetmealDTO setmealDTO) {
        log.info("修改套餐：{}", setmealDTO);
        setmealService.updateWithDish(setmealDTO);
        return Result.success();
    }


    /**
     * 修改套餐状态
     * @param status
     * @param id
     * @return
     */
    @PostMapping("/status/{status}")
    @ApiOperation("起售停售套餐")
    @CacheEvict(cacheNames = "setmealCache",allEntries = true)
    public Result startOrStop(@PathVariable Integer status, Long id) {
        log.info("起售停售套餐，状态为：{}，id为：{}", status, id);
        setmealService.startOrStop(status, id);
        return Result.success();
    }

}

2.添加购物车

package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.SetmealService;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

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

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     *
     * @param shoppingCartDTO
     */
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);//dishId,setmealId,dishFlavor
        //只能查看自己的购物车
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //1.如果购物车中已经存在该菜品或套餐，则数量+1
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list != null && list.size() == 1) {
            shoppingCart = list.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber() + 1);
            shoppingCartMapper.updateNumberById(shoppingCart.getId());
        }
        //2.购物车没有该菜品或套餐，
        else {
            //添加菜品
            Long dishId = shoppingCartDTO.getDishId();
            if(dishId!=null){
                //通过id查询菜品信息
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());

            }else{
                //添加套餐
                Long setmealId = shoppingCart.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }

            shoppingCart.setNumber(1);

            shoppingCart.setCreateTime(LocalDateTime.now());
            //则添加到购物车中
            shoppingCartMapper.insert(shoppingCart);

        }


    }

    /**
     * 查看购物车
     *
     * @return
     */
    @Override
    public List<ShoppingCart> list() {
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(BaseContext.getCurrentId()).build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    /**
     * 清空购物车
     */
    @Override
    public void clean() {
       // ShoppingCart shoppingCart = ShoppingCart.builder().userId(BaseContext.getCurrentId()).build();
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());

    }
}