如何导出将在另一个Java项目中使用的jar以及jar使用的整个maven /外部依赖关系？

Question

Sorry if my title isn't clear.

Some of my team members have built a jar for me to use, which we'll call B. That jar in turn uses a particular maven dependency (purejavacomm) which we'll call C. They gave me B by exporting it as a runnable jar, selecting the "Package required libraries" option. However, when I import B into my project and try to use it, I get a java.lang. NoClassDefFoundError and a java.lang.ClassNotFoundException in regards to some classes in C (specifically a custom exception class). I'm guessing these classes are those which aren't explicitly called anywhere in B, which is why they're not packaged with it.

So unless I include the maven dependency for C in my own pom, I can't use B. Is it possible for them to export their B in such a way that I don't have to explicitly add C? ie Make sure that the entirety of C is included with B, not just the classes that are explicitly used?

We're using Eclipse and m2e, so we haven't run any of this through mavens command line statements.

Answer 1

I'm assuming your problem occurs at runtime. If you indicate the dependency for C in your pom.xml B as <scope>provided<scope> , and include C.jar in your run time environment (say under lib folder of project), you tell maven that you are taking care of your dependency for C.jar. This will solve your problem.

Answer 2

You should use your own maven repository at your company (see Maven best practices ).

It works like a proxy for public repositories and in addition you can push your own internal JARs to your repo.

Then in your maven configuration you should point to only your corporate repo. Then your team members can publish their JAR B into the repo and you only have to add the dependency to B in your own POM.