Unable to run Spring Boot simple REST service - spring-boot

Question

I'm trying to run a basic Spring Boot application created with the Spring Initializr. I see the application is pretty much the same of many examples available on the Web but I get a '404' page not found:
package com.example;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestMethod;
#RestController
public class Controller {
#RequestMapping(value = "/", method = RequestMethod.GET)
public String hello() {
return "it works!";
}
}
This is the main class:
package com.example.springtest;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
The pom.xml includes just the web starter:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>spring-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
The execution:
$ curl http://localhost:8080
{"timestamp":"2018-12-11T09:18:59.236+0000","status":404,"error":"Not Found","message":"No message available","path":"/"}
Do I miss any starter to get it working?
Thanks

Answer 1

use #ComponentScan() annotation in the main method class and pass the path to the rest service component scan as a parameter.
because by default it only include the service which is in the package and sub package of the main class . so for adding other path service you have to pass the path in component scan annotation.