When I right-click a missing import, I have an option of "Find Jar on Web", but the Jars in the list are outdated. For example, the newest ant jar on the list is ant-1.7.1.jar, but I know that ant-1.10.1.jar is available from Maven Central.
How can I add more "sources" to the search of IntelliJ?
This happens because the repositories is outdated in your IntelliJ, so, you can update with these steps, go to:
Preferences > Build, Execution, Deployment > Maven > Repositories
Choose the Remote repository entry and click on Update button, this action takes some minutes, after of that, do the same with your Local repository, IntelliJ will be able to retrieve the last versions of your dependencies.
UPDATE
To view the remote repositories in IntelliJ, you can add in your settings.xml file (check this) or directly in your pom.xml file of your project.
This is the structure for your settings.xml file:
<project> <repositories> <repository> <id>maven-central</id> <url>http://repo.maven.apache.org/maven2</url> </repository> </repositories> </project> And this is the structure for your pom.xml file:
<dependencies> ... </dependencies> <repositories> <repository> <id>codehausSnapshots</id> <name>Codehaus Snapshots</name> <releases> <enabled>false</enabled> <updatePolicy>always</updatePolicy> <checksumPolicy>warn</checksumPolicy> </releases> <snapshots> <enabled>true</enabled> <updatePolicy>never</updatePolicy> <checksumPolicy>fail</checksumPolicy> </snapshots> <url>http://repo.maven.apache.org/maven2</url> <layout>default</layout> </repository> </repositories> After of add this configuration, IntelliJ will be able to detect the new repository.
Notice: The updated specified in your pom.xml file (or inherited from parent project's pom and settings.xml)
No remote repositories for that project, but in another project I see the URL that you posted. How can I add a Maven repository?
File > Settings... > Build, Execution, Deployment > Remote Jar Repositories.