mysqlspringboot启动报错Could not create connection to database server. Attempted reconnect 3 times. (代码片

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原因是少了时区，加&serverTimezone=UTC

jdbc:mysql://127.0.0.1:3306/my_test?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&useSSL=false&serverTimezone=UTC

参考文章：https://www.cnblogs.com/flyingDragon/p/11268920.html

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