unblock with 'mysqladmin flush-hosts'"解决办法

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mysql  报错java.sql.SQLException: null,  message from server: "Host 'xx.xx.xx.xx' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"

解决方案:

mysqladmin  -u  root  -p  flush-hosts

输入数据库密码即可!