Hi,
> You are right; I need to use a proxy server to connect to the internet.
For my
> project, I don't need internet access. Why does Maven need it.
Maven needs either an Internet connection or a repository manager with a
valid Internet connection to download plugins for building your project.
I.e. plugins for compiling your code, create a jar, install/deploy etc.pp.
Also see [1] and [2].
> And
> what can I do
> to fix the problem?
Well, specify the correct proxy settings in your IDE and in
$HOME/.m2/settings.xml. See [3] for example.
The better option is to install a repository manager such as Nexus,
Archiva, Artifactory etc. on a machine on your network, especially if
you're not the only one working with Maven ([4]).
[1] https://maven.apache.org/general.html#proxy-needed
[2] https://maven.apache.org/plugins/index.html
[3] https://maven.apache.org/guides/mini/guide-proxies.html
[4] https://maven.apache.org/repository-management.html
HTH
Thorsten
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