I have a problem with my eclipse, all class can not be resolved to a type when creating new workspace all errors are disappeared, but after a clean or updating maven, I got the same problem.我的 eclipse 有问题,所有 class 在创建新工作区时can not be resolved to a type ,所有错误都消失了,但是在清理或更新 maven 后,我遇到了同样的问题。