开发环境里,在vmware的nat模式下装了一个mysql 5.5.22 ,从主机程序访问数据库总是提示:
cannot establish a connection to jdbc:mysql://192.168.80.131:3306/manager using com.mysql.jdbc.Driver
Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
...connection refused.
找来找去,不是因为jdbc驱动的问题,也不是因为虚拟机防火墙开着的问题,也不是mysql访问账户的问题,而因为:
/etc/mysql/my.cnf里 bind-address的问题,修改为具体的IP地址,或者注释掉即可:
如下:
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address = 127.0.0.1
#
#bind-address = 192.168.80.131
默认是127,可以屏蔽其他网络ip访问数据库,只能本地访问,确实是很安全。:)
参考链接:http://stackoverflow.com/questions/10567064/why-i-get-this-error-communicationslinkfailure-thelastpacketsent-when
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