构建完成，连接数据库报错

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create connection error, url: jdbc:mysql://localhost:3306/jobx?useUnicode=true&characterEncoding=utf8&useCursorFetch=true&autoReconnect=true&failOverReadOnly=false&useSSL=false&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=Asia/Shanghai, errorCode 0, state 08001
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.