原因是mysql服务器没打开，昨天关了电脑今早开机后忘记开服务。
转载自blog.csdn.net/qq_41583663/article/details/81025285转载自blog.
阅读背景：
A ResourcePool could not acquire a resource from its primary factory or source.
来源：互联网
转载自blog.csdn.net/qq_41583663/article/details/81025285转载自blog.
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