我无法从多模块 maven 项目加载资源

Question

noob here, I have a multi module maven project but I can't load a xml file under resources folder. structure of the project:

and the TestClass source code is like the following snippet which is I stole from the internet:

public class TestClass {
    public static void main(String[] args) throws IOException {
        TestClass test = new TestClass();
        InputStream is = test.getFileFromResourceAsStream("general-analyser-job.xml");
    }
    private InputStream getFileFromResourceAsStream(String fileName) {

            ClassLoader classLoader = getClass().getClassLoader();
            InputStream inputStream = classLoader.getResourceAsStream(fileName);

            if (inputStream == null) {
                throw new IllegalArgumentException("file not found! " + fileName);
            } else {
                return inputStream;
            }
        }
    }

inputStream is alwayse null!

Answer 1

problem solved, it was silly one: in pom.xml of the module under build tag resources get excluded like:

<build>
        <resources>
            <resource>
                <directory>${basedir}/src/main/resources</directory>
               <excludes>
                    <exclude>**/*.*</exclude>
                </excludes>
            </resource>
</build>

just comment out <excludes> and everything works

Answer 2

First you don't need to add

<resources>
  <resource>
      <directory>${basedir}/src/main/resources</directory>
  </resource>
...

You can simply remove that part because it's the default (convention over configuration).

Furthermore you should put your test class TestClass.java into src/test/java plus a package name. You shouldn't put the TestClass directory into src/main/java which is the default package which shouldn't being used.

To access the resource you could go like this:

this.getClass().getResourceAsStream("/general...");

Based on your post I'm not sure if TestClass is really meant as test or as test implementation for production code later on. If so you should move it into a real package and rename it to something more useful.

Answer 3

try to put your xml file into src/test/resources and then use code like below:

InputStream is = TestClass.class.getClassLoader().getResourceAsStream("general-analyser-job.xml");