How to load resource file in a dependency jar contained in the Spring Boot jar file?

Question

When packaging the Spring Boot application as a single jar, all the dependency jars are also contained in that jar file. It forms a hierarchical structure of jars. How can I access to the resource file(such as a xml) that built in one of the dependency jar without unpackaging them?

Answer 1

If dependency jar is in your classpath, you can read XML files like:

URL loadedResource = this.getClass().getClassLoader().getResource(“your.xml”);
InputStream inputStream = loadedResource.openStream();

OR

Resource resource=new CLassPathResource(“your.xml”);
resource.getInputStream();

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If it is properties file you want to read, you can use @PropertySource annotation:

@PropertySource("classpath:your.properties")