在redis里创建一个文件夹的示例：
使用spring在redis的缓存中创建文件夹，代码：
@Cacheable(value = "displayItem", cacheManager = "longLifeCacheManager")
public DisplayItem getDisplayItem(String displayItemCode) {
// Do a lot of things
}
@Cacheable(cacheManager = "mediumLifeCacheManager", value = "preferences:userPreferences", key = "#zenithName")
public UserPreferences getUserPreferencesByZenithName(String zenithName) {
// Do something
}
