使用日历类injava同步服务器时间 [英] synchronizing servers time using calendar class injava

问题描述

我已经构建了两个服务器在Web服务使用java.My问题是，我无法弄清楚如何同步服务器时间使用日历类在java.I将很高兴，如果你帮助我，至少它

感谢

解决方案

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我不认为你应该使用Java来同步它们之间的系统时间。有一个成熟且广泛传播的协议可用于此问题：网络时间协议

否则您必须处理

• 网络延迟


• 内部CMOS时钟漂移


• 获得正确的参考日期


• 系统权限：通常需要root才能更改时间...，




当然，所有这些问题都是在NTP中解决的。




I have constructed two servers in web service using java.My problem is that i couldn't figure out how can i synchronize servers time using calendar class in java.I would be glad if you help me with that, at least it would be nice to give me an example how can i do that.

Thanks

解决方案

I don't think that you should use Java to sync the system times between them. There is a matured and widely spread protocol available for this issue: The Network Time Protocol

Otherwise you have to deal with

• network latency
• time drifts of internal CMOS clock
• getting the correct reference date
• system rights: normally root is required to change the time ... and you don't want your web service running as root?

Of course, all of these issues is solved in NTP.

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