Spring Boot Controller not mapping

Question

I have used STS and now I am using IntelliJ Ultimate Edition but I am still getting the same output. My controller is not getting mapped thus showing 404 error. I am completely

Answer 1

Because of DemoApplication.class and HelloController.class in the same package
Locate your main application class in a root package above other classes
Take look at Spring Boot documentation Locating the Main Application Class

Using a root package also allows component scan to apply only on your project.

For example, in your case it looks like below:

com.webservice.demo.DemoApplication
com.webservice.demo.controller.HelloController