[redis]黑马点评-商铺类型缓存

Redis-P37-商城类型缓存接口开发

@GetMapping("list")publicResultqueryTypeList(){returntypeService.queryList();}

IShopTypeService

publicinterfaceIShopTypeServiceextendsIService<ShopType>{ResultqueryList();}

ShopTypeServiceImpl

@ServicepublicclassShopTypeServiceImplextendsServiceImpl<ShopTypeMapper,ShopType>implementsIShopTypeService{@ResourceprivateStringRedisTemplatestringRedisTemplate;@OverridepublicResultqueryList(){Stringkey=CACHE_TYPE_LIST;//从redis中查询类型缓存StringtypeJson=stringRedisTemplate.opsForValue().get(key);if(StrUtil.isNotBlank(typeJson)){//存在,直接返回List<ShopType>shopTypeList=JSONUtil.toList(typeJson,ShopType.class);returnResult.ok(shopTypeList);}//为空,查询数据库List<ShopType>shopTypeList=query().orderByAsc("sort").list();//将数据库信息转为str保存到缓存stringRedisTemplate.opsForValue().set(key,JSONUtil.toJsonStr(shopTypeList));returnResult.ok(shopTypeList);}}