How avoid Eclipse load test-class file in to classpath when Java app run?

Question

I am using STS to develop a large Spring Boot based application. We have multiple maven projects and a parent project to include them all. Each project has own testing code and config files.

When I run the Spring Boot application in the main entry class. The test-classes folder of the depended projects will be loaded into the app running classpath, that causes some conflict of spring bean definition. I have to config every project removing [src/test/java and src/test/resources] from the 'source folders on build path'.

The whole project structure is like below:

app-parent

sub-app-1

sub-app-2

sub-app-3

main-app [running from this project]

main-app project has dependencies on the sub-app-1 ~ 3.

Is there any way to let STS (Eclipse) run a Java App excluding the test-classes folder from classpath? I really do want the testing code under source folder but not have them when the App run.

Besides, I tried open the [run configuration], but it can only add more file to the classpath.

Answer 1

As pointed out by @torsten-crass, verify that Exclude test code is ticked in your Classpath tab of Run configurations in Eclipse.

Here is the screenshot.