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异常信息：com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureThe last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packe...

刚学完SSH没多久，写一个demo项目的时候遇到这个问题。我的配置基本都是使用注解配置的，只有dao层是在xml文件中配置。service层代码：package com.xushuai.crm.service.impl;import java.util.List;import javax.annotation.Resource;import org.hibernate.crite...