Why dependencies do not accompany the made package by Maven?

Question

I\'ve followed the simplest maven example and made the following pom.xml file:

Answer 1

The problem is, you are setting the classpath to a single .jar file, thus java command can not find the dependency. (json-simple-1.1.1.jar in your case..)

You can tell maven to include the dependencies in target folder that you compiling your class to.

This is done by the following change in the pom.xml:

  
    
      maven-dependency-plugin
      
        
          install
          
            copy-dependencies
          
          
            ${project.build.directory}/lib
          
        
      
    
  

Now try mvn package (or mvn clean install, I am not sure..) and you will see in /target/lib the dependencies are copied.

Run your application like this:

java -cp target/my-app-1.0-SNAPSHOT.jar:target/lib/json-simple-1.1.1.jar com.mycompany.app.App
{"hello":"world"}