@SpringBootApplication annotation example in Spring Boot

In this post, we will see @SpringBootApplication annotation example in Spring Boot.

• This annotation is a combined form of @SpringBootConfiguration,@EnableAutoConfiguration, and @ComponentScan.
• We use this annotation with class.
• This annotation introduced in Spring  1.2, available in org.springframework.boot.autoconfigure package.
• Optional elements  (exclude, excludeName, ScanBasePackageClasses, ScanBasePackages).

@SpringBootApplication annotation example in Spring Boot.

SpringMain.java

package springbootexample;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class SpringMain {
	public static void main(final String[] args) {
		final ConfigurableApplicationContext configurableApplicationContext = SpringApplication
				.run(SpringMain.class, args);
		 
		
	}
}

TestContoller.java

package springbootexample;


import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {
	@RequestMapping(value = "/rest")
	public String printHello(){
		
		return "hello";
	}
}

The directory structure should look likes below.

/SpringBootAnnotExamp/src/main/resources/application.properties

server.port = 9093

Let’s modify the SpringMain.java. We will use @SpringBootConfiguration, @EnableAutoConfiguration and @ComponentScan instead of @SpringBootApplication.

SpringMain.java

package springbootexample;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ComponentScan;

@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan
public class SpringMain {
	public static void main(final String[] args) {
		final ConfigurableApplicationContext configurableApplicationContext = SpringApplication
				.run(SpringMain.class, args);
		 
		
	}
}

Run this class and hit the rest URI on the browser.

That’s all about @SpringBootApplication annotation example in Spring Boot.

You may like.

• @RestController and @Controller annotation example in Spring Boot.
• @RequestMapping annotation example In Spring Boot.
• @RequestBody and @ResponseBody annotation example in Spring Boot.
• @PathVariable and @RequestParam annotations in Spring Boot.
• @RequestHeader annotation example by using Spring Boot.
• @Component, @Controller, @Service and @Repository annotations example using Spring Boot.
• @Configuration annotation example using spring boot.
• @ComponentScan example in spring boot.
• Content negotiation example using Spring Boot.
• Filter example in Spring Boot.
• Spring Boot interceptor example.
• Spring restful web services example using spring boot.
• Deploy multiple war files in JBoss to different port.
• Spring boot datasource configuration using tomcat.
• Jboss 7 EPA datasource configuration using oracle and spring boot.
• @ControllerAdvice Global Error Handling Example in Spring Boot
• @ExceptionHandler Example in Spring Boot.
• Spring Data JPA example using spring boot.
• Spring batch basic.
• Spring batch task scheduling example using spring boot.
• Spring transaction management basic.
• Spring transaction management example using spring boot.
• Spring security default authorization example using spring boot.
• Spring security inMemoryAuthentication and authorization example using spring boot.
• How to deploy multiple war files in Jboss in same port.
• @Transactional noRollbackForClassName example using spring boot
• @Transactional rollbackForClassName example using spring boot
• @Transactional readonly true example in spring boot
• @Transactional noRollbackFor example using spring boot.
• @Transactional rollbackFor example using spring boot.

Check @SpringBootApplication annotation docs.