Generate Project
go to start.spring.io and generate the project with Web dependency

Extract the archive and import it to your IDE
Add Rome Dependency
<!-- https://mvnrepository.com/artifact/com.rometools/rome --><dependency>
<groupId>com.rometools</groupId>
<artifactId>rome</artifactId>
<version>1.11.1</version>
</dependency>
Create Rest Controller

Start the Feed
mvn spring-boot:run
Browse from Browser

Subscribe from RSS Feed Reader

