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maven generates wrong download url for artifact

We have Nexus(https://maven.mycompany.com/repository/maven-public/) repository. We have deployed jar snapshot repo
<dependency>
<groupId>com.mycompany.my-proj</groupId>
<artifactId>my-app</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
But another application that uses this dependency couldn't download artifact. I've tried download dependency with command line*(maven version 3.8.4)*
mvn org.apache.maven.plugins:maven-dependency-plugin:3.2.0:get -DrepoUrl=https://maven.mycompany.com/repository/maven-public/ -Dartifact=com.mycompany.my-proj:my-app:1.0-SNAPSHOT
-P my-repo
Suddenly I've noticed that maven builds the wrong download URL as below that "com." missed
Downloading from my-repo: https://maven.mycompany.com/repository/maven-public/mycompany/my-proj/my-app/maven-metadata.xml
Then I used quotation marks for -Dartifact="com.mycompany.my-proj:my-app:1.0-SNAPSHOT" after that worked and downloaded. I didn't understand what is the problem? This problem also exists in the building of the project.

How to add 3rd party JARs to Maven project [duplicate]

This question already has answers here:
Add a dependency in Maven
(5 answers)
Closed 3 years ago.
My area of expertise is not Java. I develop in other languages on other platforms.
Right now I'm developing a series of Java servlets for a project. The servlets are to run on a CentOS server running FileNetP8.
I actually got all of the planned items finished and running.
Now when I am trying to add a few more services, the library I came across is available via Maven. I have no idea what Maven is. Read up on it today. Created a test project to try it out.
My development environment is Eclipse Photon on Windows 10.
Now my problem is I can't figure out how to add the Filenet JARs to the project. I can't upload them to some Maven repo. Searching the Web says to add them to the local repo, but I don't understand how to do that to the Local repo in Eclipse's builtin Maven.
I think that the JARs don't need to be packaged within the deployment WAR because the app will be deployed to the Websphere server that runs Filenet so they should be available on it. Should I add them as external JAR references to get the project to compile?

I provide below the following approaches to check based upon your suitability.
Approach-1: Install manually
If you have only 1 jar file, execute the following command by replacing as per your requirements.
mvn install:install-file \
-Dfile=<file path location> \
-DgroupId=<your own custom group id> \
-DartifactId=<your own custom artifact id> \
-Dversion=<some version number> \
-Dpackaging=jar \
-DgeneratePom=true
Once it is done, use the following in your project pom.xml in the dependency section.
<dependency>
<groupId>your own custom group id</groupId>
<artifactId>your own custom artifact id</artifactId>
<version>some version number</version>
</dependency>
The downside of the above approach is, only you can use it as it installs in your .m2 directory. For other developers, they have to follow the same approach. It is not a suggested approach.
Approach-2: Manually add the location of jar file
Add the following dependency in pom.xml
<dependency>
<groupId>some.group.id</groupId>
<artifactId>some.artifat.id</artifactId>
<version>some.version.no</version>
<scope>system</scope>
<systemPath>${project.basedir}/libs/yourActualJarFileName.jar</systemPath>
</dependency>
The downside of the above approach is, you have to put all the jar files in a directory and you have to provide the path. All the jar files should be part of your project, it means all the jar file should be put in source code repository. Although it servers the purposes, still it is not a good approach. If you got a newer/higher version of jar file, again you have to put it inside your lib directory. It means you have manage all the old and new versions of jar files.
Best Approach
Maintain Nexus or Artifactory, or any artifactory management system in the organisation and put all the jar files and provide the definition of your custom jar file. It will provide you pom definition. Based upon this, you have to add the dependencies in your project pom.xml. Here you can maintain n number version of your custom jar files.

Seeing as every answer involves maven i'll try to provide a different and somewhat old school approach. You could always import your jars directly into your project by right clicking on it -> properties -> Add Jars. Apply when done and Voilà. This is far easier than understanding the complexity of maven.

Dependencies need to be added in pom.xml under dependencies tag. Maven will download the specified jars from maven central repository for the first time, and it will be saved in your local repo.
If the dependencies are not available in central repo and if they have their own repo, you to need specify it in the repositories tag.
<repositories>
<repository>
<id>repo-id</id>
<name>repo-name</name>
<url>http://repourl</url>
</repository>
</repositories>
Any change in the pom.xml, maven will automatically download it.
<dependencies>
<dependency>
<groupId>dependency-id</groupId>
<artifactId>artifactid</artifactId>
<version>1</version>
</dependency>
</dependencies>

If the jars are available in Maven Central repo then all you hvae to do is add dependency under dependencies section in your pom.xml file. Set the scope as required, like you said jars don't needed to be packaged in WAR file as they might be available on server then you can set scope to provided.
<dependency>
<groupId>groud-id</groupId>
<artifactId>artifact-id</artifactId>
<version>version-numbe</version>
<scope>scope</scope>
</dependency>
If jars are not available in central repo and you want to install them on your local repo then below command should help you. More information here.
mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> -DartifactId=<artifact-id> -Dversion=<version> -Dpackaging=<packaging>

How do I build my Maven pom in Eclipse?

I have a project that uses UI4J, and instead of using external jar I decided to go for maven, I am going to distribute it via git, so I guessed that this is a much better approach.
This is my pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>Kalamaria</groupId>
<artifactId>KalamariaHarverst</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>MavenFirst</name>
<dependencies>
<dependency>
<groupId>com.ui4j</groupId>
<artifactId>ui4j</artifactId>
<version>2.0.0</version>
<type>pom</type>
</dependency>
</dependencies>
</project>
The problem is that I can't find a way to get this to work. What ever I try I am still getting errors on the import of the library, meaning that the jar of the ui4j is not imported.
I have (among others) tried to do a "Maven bumvn eclipse:eclipseild" with "clean install" as goal
Downloading source and Updating Project from the Maven menu
even tried to do a mvn eclipse:eclipse from the console, but i got this error
The program 'mvn' can be found in the following packages: * maven *
maven2 Try: sudo apt-get install
How does this work, what should I do to import the declared jars?

Removing <type></type> was the correct first step that you need to do.
Now, there's probably still a pom.lastUpdated file in your repository that is wrong, you need to forcibly override it. The easiest thing to do is just delete the entire directory in your .m2 directory, which is located in your OS dependent home directory. On windows, this would be:
C:\Users\<username>\.m2\repository\com\ui4j
On Linux, this is usually in:
/home/<username>/.m2/repository/com/ui4j
Delete that directory, and then do Maven -> Update project, this should fix your problem.
By the way, mvn eclipse:eclipse is almost never the right thing to do, it's much better to use m2eclipse for your eclipse integrations as it works much more seamlessly.
I am not able to reproduce the behavior of the pom type being added automatically when you add the ui4j dependency. However, most of the time the correct dependency <type> is jar, as that is the default. pom dependencies are most often used when a project is simply a pom and nothing else, which is common as the parent pom of an entire application.
In this case (as in most cases), the type you want is jar, so don't specify a type parameter.

To add a bit more background to #durron597 's correct answer:
tag defines what Maven looks for in the repository when it downloads your artifact. Various types exist. Most common and default is "jar" - Maven will look for something packaged as "jar" - a regular *.jar file. Other types include "test-jar", "war" and "pom". Type "pom" means that Maven will look for something packaged as "pom" - basically your dependency's pom.xml file. Most of the artifacts you refer to are packaged as "jar" and do not supply "pom" packaging. See http://maven.apache.org/pom.html#Dependencies, search for "Type".

how to add jar dependency in maven?

When I run
mvn compile
I get package com.ibm.icu.util does not exist. So I downloaded the ICU4J jar and installed it into the local repository. I confirmed it's in .m2/repository/com/ibm/icu/icu4j/3.4.4/icu4j-3.4.4.jar. Inside that jar file is the missing class file com/ibm/icu/util/Calendar.class. Then I added the following into the dependencies section of pom.xml:
<dependency>
<groupId>com.ibm.icu</groupId>
<artifactId>icu4j</artifactId>
<version>3.4.4</version>
</dependency>
But when I run mvn compile again, I get the same error. What am I doing wrong?

You should avoid adding dependencies manually.
If you don't know a groupId and artifactId of the dependency you need, search for it at http://mvnrepository.com/. Usually, groupId matches the package names in the jar file.
For your case, the dependency is already there: http://mvnrepository.com/search?q=com.ibm.icu
So, go to http://mvnrepository.com/artifact/com.ibm.icu/icu4j and get the version of the dependency you need, e.g. 55.1: http://mvnrepository.com/artifact/com.ibm.icu/icu4j/55.1
Grab maven dependency xml and put it to your pom.xml file:
<dependency>
<groupId>com.ibm.icu</groupId>
<artifactId>icu4j</artifactId>
<version>55.1</version>
</dependency>
If you didn't find your dependency try to find it in google. Sometimes the dependency may be found in some corporate public repositories, not in a central. In this case you need to add the third-party repository to repositories section of your pom.xml.
If you're unable to find your dependency in the public repository then you have three options:
A. Install jar to internal repository server (e.g. nexus)
B. Put the JAR file in your project sources and declare project maven repository :
<repositories>
<repository>
<id>my-local-repo</id>
<url>file://${basedir}/my-repo</url>
</repository>
</repositories>
Important: You should keep the maven repository layout in your local repository.
C. [Bad Practice] Use maven install plugin to install your custom jar to local repository on your machine. But it's a badIt's not recommended.
mvn org.apache.maven.plugins:maven-install-plugin:2.5.2:install-file -Dfile=path-to-your-artifact-jar -DpomFile=path-to-pom
D. [Bad Practice] Use system dependency with absolute path to the JAR file, although it's a bad practice and should be avoided.
<dependency>
<groupId>test</groupId>
<artifactId>test</artifactId>
<version>X.Y.Z</version>
<scope>system</scope>
<systemPath>${user.home}/jars/my.jar</systemPath>
</dependency>

You should not be manually installing things into the maven repository directory. That directory is maintained by maven itself.
The way dependencies work is that when you run mvn compile or some other goal, it will connect to the maven central repository and download the needed dependencies and their dependencies.
If you manually install a jar file, it may not have it's dependencies. That icu artifact will likely have other things it depends on. Maven will automatically resolve these dependencies.
I would recommend using mvn clean install this will clean the target directory and rebuild everything.
If it fails to download, then you likely need to change the maven configuration. For example, if you are behind a proxy server you need to configure maven with the proxy credentials.
Also, if you manually copied anything into the .m2/repository/ directory you should delete it and let maven put it in there correctly instead.
The beauty of maven is that you don't need to worry about things like downloading jars. It just handles that for you. Let it do it's job.

If you have an internal artifactory like JFrog maybe you should check that the jar is there. Do not download manually to .m2 because it's at least strange. At most you can upload the jar in that artifactory manually.

Maven: How to include jars, which are not available in reps into a J2EE project?

in my J2EE project I've a couple of dependencies, which are not available in any Maven repository, because they're proprietary libraries. These libraries need to be available at runtime, so that have to be copied to target/.../WEB-INF/lib ...
Right now, I'm listing them as system dependency in my POM, but with this method the problem is, that aren't being copied to the target build during compilation. Also this method is not very elegant.
So which is the best way to integrate them in Maven?
Note: I don't want to create my own Maven repository.

For people wanting a quick solution to this problem:
<dependency>
<groupId>LIB_NAME</groupId>
<artifactId>LIB_NAME</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${basedir}/WebContent/WEB-INF/lib/YOUR_LIB.jar</systemPath>
</dependency>
just give your library a unique groupID and artifact name and point to where it is in the file system. You are good to go.
Of course this is a dirty quick fix that will ONLY work on your machine and if you don't change the path to the libs. But some times, that's all you want, to run and do a few tests.
EDIT: just re-red the question and realised the user was already using my solution as a temporary fix. I'll leave my answer as a quick help for others that come to this question. If anyone disagrees with this please leave me a comment. :)

As you've said you don't want to set up your own repository, perhaps this will help.
You can use the install-file goal of the maven-install-plugin to install a file to the local repository. If you create a script with a Maven invocation for each file and keep it alongside the jars, you (and anyone else with access) can easily install the jars (and associated pom files) to their local repository.
For example:
mvn install:install-file -Dfile=/usr/jars/foo.jar -DpomFile=/usr/jars/foo.pom
mvn install:install-file -Dfile=/usr/jars/bar.jar -DpomFile=/usr/jars/bar.pom
or just
mvn install:install-file -Dfile=ojdbc14.jar -DgroupId=com.oracle -DartifactId=ojdbc14 -Dversion=10.2.0 -Dpackaging=jar
You can then reference the dependencies as normal in your project.
However your best bet is still to set up an internal remote repository and I'd recommend using Nexus myself. It can run on your development box if needed, and the overhead is minimal.

Create a repository folder under your project. Let's take
${project.basedir}/src/main/resources/repo
Then, install your custom jar to this repo:
mvn install:install-file -Dfile=[FILE_PATH] \
-DgroupId=[GROUP] -DartifactId=[ARTIFACT] -Dversion=[VERS] \
-Dpackaging=jar -DlocalRepositoryPath=[REPO_DIR]
Lastly, add the following repo and dependency definitions to the projects pom.xml:
<repositories>
<repository>
<id>project-repo</id>
<url>file://${project.basedir}/src/main/resources/repo</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>[GROUP]</groupId>
<artifactId>[ARTIFACT]</artifactId>
<version>[VERS]</version>
</dependency>
</dependencies>

You need to set up a local repository that will host such libraries. There are a number of projects that do exactly that. For example Artifactory.

None of the solutions work if you are using Jenkins build!! When pom is run inside Jenkins build server.. these solutions will fail, as Jenkins run pom will try to download these files from enterprise repository.
Copy jars under src/main/resources/lib (create lib folder). These will be part of your project and go all the way to deployment server. In deployment server, make sure your startup scripts contain src/main/resources/lib/* in classpath. Viola.

you can install them in a private, local repository (e.g. .m2/repository under your home directory): more details here

If I am understanding well, if what you want to do is to export dependencies during the compilation phase so there will be no need to retrieve manually each needed libraries, you can use the mojo copy-dependencies.
Hope it can be useful in your case (examples)

#Ric Jafe's solution is what worked for me.
This is exactly what I was looking for. A way to push it through for research test code. Nothing fancy. Yeah I know that that's what they all say :) The various maven plugin solutions seem to be overkill for my purposes. I have some jars that were given to me as 3rd party libs with a pom file. I want it to compile/run quickly. This solution which I trivially adapted to python worked wonders for me. Cut and pasted into my pom. Python/Perl code for this task is in this Q&A: Can I add jars to maven 2 build classpath without installing them?
def AddJars(jarList):
s1 = ''
for elem in jarList:
s1+= """
<dependency>
<groupId>local.dummy</groupId>
<artifactId>%s</artifactId>
<version>0.0.1</version>
<scope>system</scope>
<systemPath>${project.basedir}/manual_jars/%s</systemPath>
</dependency>\n"""%(elem, elem)
return s1

Continue to use them as a system dependency and copy them over to target/.../WEB-INF/lib ... using the Maven dependency plugin:
http://maven.apache.org/plugins/maven-dependency-plugin/examples/copying-artifacts.html

Install alone didn't work for me.
mvn deploy:deploy-file -Durl=file:///home/me/project/lib/ \
-Dfile=target/jzmq-2.1.3-SNAPSHOT.jar -DgroupId=org.zeromq \
-DartifactId=zeromq -Dpackaging=jar -Dversion=2.1.3