Maven项目中：com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create conn

报错信息 详细信息 ERROR [Druid-ConnectionPool-Create-2074541388] - create connection error, url: jdbc:mysql://localhost:3306/ssmtest?characterEncoding=UTF-8, errorCode 0, state 08001 com.mysql.jdbc.exception

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