Connections could not be acquired from the underlying database!
Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
今天寫單元測試的時候遇到的資料庫問題，百度可能會有各種各樣的答案，但是我這個是因為，MySQL
資料庫版本不一致導致的
把這個和安裝的資料庫版本保持一致就解決這個問題了
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