Null key returned for cache operation (maybe you are using named params on classes without debug info?) Builder（解决Null key returned for cache operation）

Null key returned for cache operation (maybe you are using named params on classes without debug info?) Builder（解决Null key returned for cache operation）

@Cacheable(cacheNames = "demoCache", key = "#id")
User getUserById(Integer id);

解决: key = "#id" 改成: key = "'_' + #id"

@Cacheable(cacheNames = "demoCache", key = "'_' + #id")
User getUserById(Integer id);