com.mysql.cj.jdbc.Driver改为 com.mysql.jdbc.Driver

demo-system/demo-system-biz/src/main/resources/application-test.yml

@@ -1,6 +1,6 @@
 spring:
   datasource:
-    driver-class-name: com.mysql.cj.jdbc.Driver
+    driver-class-name: com.mysql.jdbc.Driver
     url: jdbc:mysql://39.104.100.138:3306/demo_system?serverTimezone=GMT%2B8&autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&nullCatalogMeansCurrent=true
     username: root
     password: yxt_mysql_138