Finding missing Maven artifacts

Question

I\'m new to Maven, and struggling with adding dependencies. I\'m trying to convert an existing project to Maven, and after adding the dependencies for all the jars in my ref

Answer 1

Thanks to everyone for responding. The actual cause of the problem is that for each of those 3 missing artifacts, for some reason, when Maven downloaded them into my local repository, .lastUpdated was appended to the end of the jar. For example, stax-1.0.jar.lastUpdated. This is the reason Maven could not find stax-1.0.jar.

So, to fix this problem, I had to manually download stax-1.0.jar, then install it into the local maven repository in the exact same place as the messed up file, so that Maven could find it. (For example, using the command:

mvn install:install-file -Dfile=<path-to-file>/stax-1.0.jar         
-DgroupId=stax -DartifactId=stax -Dversion=1.0 -Dpackaging=jar

Using the same exact groupId and artifactId as the existing, incorrect file was crucial in order for maven to find it.

Answer 2

You can find dependency search Sites under maven.apache.org. Go to the left side Navigation Menü entry FAQ (official) and Thun to end of page.

Answer 3

It's more likely that your POM definition is not correct for log4j. Everything relating to log4j should be readily available in maven.

Also, if you know the name of the bundle (such as log4j) you can almost always do a quick google search "[bundle name] maven pom" within the first few hits you should either get the maven repo containing a quick snippet on how to include it, or the actual website for the bundled up jar and the maven instructions.

For example log4j:

<dependencies>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
    </dependency>
</dependencies> 

Sometimes though you just need to specify the repository to find the item in (if it's not hosted in the greater maven repositories)

You can specify a new repository like so

<repositories>
    <repository>
        <id>Java.Net</id>
        <url>http://download.java.net/maven/2/</url>
    </repository>
</repositories>

Finally when you absolutely cannot find the artifact already maven'd up for you (this is usually true for proprietary jars and or drivers that you cannot include with your project) you can have the user manually install the item via command line

mvn install:install-file -DgroupId=[group-id] -DartifactId=[artifact-id] -Dversion=[version] -Dfile=/path/to/the/file -Dpackaging=[type]

You can then reference it in your maven file using the information described above

For example I have a custom reference for a salesforce.com project

mvn install:install-file -DgroupId=com.salesforce -DartifactId=wsc -Dversion=22 -Dfile=\tsclient\H\development\java\wsc-22.jar -Dpackaging=jar

To access it in maven:

<dependency>
    <groupId>com.salesforce</groupId>
    <artifactId>wsc</artifactId>
    <version>22</version>
</dependency>

Finally, you can find the jars (or their maven info) at their respective websites (please note I'm just basing these links off the jar names, these may not be the actual websites, well sans the log4j which I know to be correct)

Stax

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Log4j