Use your class as a bean in Spring Boot
Depending on your needs, you can either leverage @ComponentScan to automatically detect your class and have an instance created, use it together with @Autowired and @Value to get dependencies or properties injected, or you can use a method annotated with @Bean to have more control over the construction of the bean being created
Spring project main class
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
Using @Component
package com.example.demo;
import javax.annotation.PostConstruct;
import org.springframework.stereotype.Component;
@Component
public class HelloBean {
@PostConstruct
public void sayHello() {
System.out.println("Hello world, from spring bean");
}
}
Spring Boot will detect this class and create a bean instance from it. The @PostConstruct annotated method is invoked after construction and injection of all dependencies.
Output
Hello world, from spring bean
