摘要：
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 很容易看出是数据库出了问题，看看是否是db 阅读全文
摘要：
Error creating bean with name 'itemCatController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.B 阅读全文