MissingResourceException：运行 JAR 时找不到基本名称的捆绑包

Question

I made a maven spring-boot project using Spring Initializr and added the basic dependencies like starter-web, tom-cat-jasper, dev-tools and etc.. then imported it in Eclipse.

I then added a new external JAR in my local repository that is not from maven repository using

mvn install:install-file

and added the new dependendcy in the pom.xml

<dependency>
  <groupId>com.domain.project</groupId>
  <artifactId>resourceName</artifactId>
  <version>1</version>
</dependency>

And this external JAR has a.properties that's need to be added in order for it to connect to a database. I put this.properties file in src/main/resources and tested the methods in the external JAR and it works as intended in the Eclipse IDE.

After this I run the project as Maven build with goals: clean install so that it can be run as an executable JAR.

Then I run the JAR with start java -jar using a.bat file everything is working but whenever I used the methods from the external JAR via GET/POST request it gives the error:

java.util.MissingResourceException: Can't find bundle for base name resourceName, locale en_US
    at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1581) ~[?:1.8.0_241]
    at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1396) ~[?:1.8.0_241]
    at java.util.ResourceBundle.getBundle(ResourceBundle.java:782) ~[?:1.8.0_241]
    at com.domain.project.vitality.VitalityInfo.VitalityInfoDetails(VitalityInfo.java:28) ~[resourceName-1.jar!/:?]

This is the name of the external JAR: resourceName.jar and the required properties file: resourceName.properties.

I also encountered this error if I rename or removed the required.properties file in src/main/resources in Eclipse IDE.

If I run the project only in Eclipse IDE and access the said external JAR methods via GET/POST request it gives the usual JDBC SQL error.

How do I fix this whenver I build using maven any help is very much appreciated?

EDIT: This is the result from jar tf of executable JAR when using maven build.

BOOT-INF/classes/application.properties
BOOT-INF/classes/resourceName.properties
BOOT-INF/classes/log4j2-spring.xml

EDIT: Issue is resolved.

Answer 1

Turns out the solution was rather simple.
In my case the external JAR has this in its implementation

ResourceBundle bundle = ResourceBundle.getBundle("resourceName");

I changed this into

ResourceBundle bundle = ResourceBundle.getBundle("application");

And simply renamed resourceName.properties file into application.properties or just copy the content from resourceName.properties into your application.properties or any property file that spring-boot is able to read.