org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied f

org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user ‘’@‘localhost’ (using password: YES))

解決：在dbcp配置檔案裡面username等資訊是灰色的，我以為這樣是不生效，是以改成user了，這樣會高亮，結果報錯！！

改回來就好了

#連接配接設定
driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
username=root
password=root



#最大連接配接數量
maxActive=50

#<!-- 最大空閑連接配接 -->
maxIdle=20