进入文件|设置|构建，执行，部署|构建工具| Maven

选择“始终更新快照”

下面最左边的按钮(蓝色循环)也重新导入了所有的maven项目:

还有一个有用的设置告诉IntelliJ检查依赖项的新版本，即使版本号没有改变。我们有一个本地maven存储库和一个快照项目，它更新了几次，但版本号保持不变。问题是IntelliJ/Maven没有更新这个项目，因为版本号是固定的。

要启用检查变更的依赖关系，尽管版本号没有改变，请进入“Maven项目”选项卡，选择“Maven设置”，并在那里激活“始终更新快照”。

进入文件|设置|构建，执行，部署|构建工具| Maven

选择“始终更新快照”

执行此命令 mvn -U clean install

这在2022年仍然是一个问题。

The option Setting > Maven > Always update snapshots no longer works in IDEA 2022.2.2, probably because Maven 3 frowns upon it and IntelliJ seems to not have updated the IDE to make it function. A simple solution might be to be able to add maven -U clean install as a custom target to the Lifecycle list in the IDEA Maven tab, but if it is possible it is not clear how to do it (even after googling for days). A not as nice but viable solution would be to go into the Terminal tool of IDEA and typing maven -U clean install, but IDEA does not expose the maven command in its Terminal by default and again it is not clear how to configure it so that it would.