There are high chance your company is set up a firewall and force the developers to connect internet via using HTTP proxy. If you are using HTTP proxy, Maven may not able to download the dependency libraries outside. To bypass it, you have to enable the proxy setting in Maven configuration file “settings.xml“.

1. Maven configuration file

Find your Maven configuration file – e.g, {M2_HOME}/conf/settings.xml

2. Edit it “settings.xml”

Find the following pattern

<proxies>
    <!-- proxy
     | Specification for one proxy, to be used in connecting to the network.
     |
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    -->
</proxies>

Comment out the proxy setting and fill in your proxy information.

<proxies>
 
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.yourcompany.com</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
 
</proxies>

4. Saved it, Done.

Apache Maven is able to connect to Internet via proxy server now.

P.S No restart is required, how do you restart Maven :) ? Maven is just a command , when you call it, it will read this file again.

Any Java questions or problems? please post at this JavaNullPointer.com forum, see you there ~
[ Read More ] You can find more similar articles at Maven Tutorials