问题一：
eclipse中使用mybatis-generator逆向代码生成工具出现waiting for "building workspace"
解决办法：
选择菜单栏的 Project ,然后把菜单栏中 Build Automatically 前面的对钩去掉即可解决。
问题二：
com.mysql.jdbc.exceptions.jdbc4.communicationsexception: communications link failure
the last packet sent successfully to the server was 0 milliseconds ago. the driver has not received any packets from the server.
事故现场：
解决办法：
test001为数据库名