Nullkeyreturnedforcacheoperation(maybeyouareusingnamedparamsonclasseswithoutdebug

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);