自Maven 2.0.9开始，所有核心的插件都设定了稳定版本，这意味着日常使用Maven时几乎不会受到不稳定插件的影响。此外，Maven社区也提倡为你使用的任何插件设定稳定的版本。从Maven 3开始，如果你使用插件时未设定版本，会看到警告信息(Since Maven 2.0.9, all core plug-ins have set a stable version, which means that the daily use of Maven is hardly affected by the unstable plug-ins. In addition, the Maven community also advocates setting a stable version for any plug-in you use. From Maven 3, if you don't set a version when you use a plug-in, you will see a warning message)