一直能正常运行的本地项目，在IDEA中突然跑不起来
解决步骤：
给application启动类的run方法加上try-catch
打印日志为Failed to determine a suitable driver class，说是数据源有问题
实则是IDEA抽风了
1.尝试删除idea缓存重启Invalidate Caches / Restart...，无效
2.尝试rebuild project，无效
3.尝试用maven来clean，无效
4.用maven的整个项目install，解决了
每个人情况不一样，以上方法都可以试试
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