JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to run spring boot as a standalone application (non-web)?


Till now we have given examples on spring boot running as a web based application. In this page we are giving an example on how to create spring boot standalone application. In spring boot, we need to implement CommandLineRunner interface and override run() method to create standalone application.

Since we are creating standalone application, include only "spring-boot-starter" in the pom.xml file

<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>
	<groupId>com.java2novice.springboot</groupId>
	<artifactId>spring-boot-tutorials</artifactId>
	<packaging>jar</packaging>
	<version>0.0.1-SNAPSHOT</version>
	
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.2.RELEASE</version>
	</parent>
	
	<properties>
		<java.version>1.8</java.version>
	</properties>
	
	<dependencies>
		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
	</dependencies>
	
	<build>
		<plugins>
			<!-- Package as an executable jar/war -->
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

Here is our starting class. Since it implements CommandLineRunner interface, run() method would be the entry point for the code.

package com.java2novice.springboot;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootStandaloneApplication implements CommandLineRunner{

	public static void main(String[] args) throws Exception {

        SpringApplication app = new SpringApplication(SpringBootStandaloneApplication.class);
        app.run(args);

    }

	@Override
	public void run(String... arg0) throws Exception {

		// TODO Auto-generated method stub
		System.out.println("Spring boot standalone application is working...");
	}

}
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Spring-Boot Examples

  1. Spring-Boot initial setup.
  2. Spring-Boot hello world example
  3. What is spring-boot-starter-parent in Spring-Boot pom.xml file?
  4. What is @SpringBootApplication annotation in spring boot?
  5. What is application.properties in spring boot?
  6. What is @ConfigurationProperties annotation in spring boot?
  7. Spring Boot @ConfigurationProperties example
  8. Spring Boot @ConfigurationProperties Property Validation
  9. Difference between @ConfigurationProperties and @Value
  10. Spring boot web application configurations.
  11. How to run spring boot application through command line?
  12. How to run spring boot as a standalone application (non-web)?
  13. Spring boot property resolution order.
  14. Spring Boot – Profile based properties example.
  15. How to configure logback (SLF4J) logging to spring boot applications?
  16. How to update application context path in spring boot?
  17. How to disable spring logo banner in spring boot?
  18. Spring Data JPA with Spring Boot Applications - Oracle - example
  19. Spring Data JPA with Spring Boot Applications - MySql example
  20. How to configure Spring Boot to show Hibernate SQL Query in logs?
  21. Spring Boot – List all Beans loaded in the ApplicationContext
Knowledge Centre
Domain Naming Service(DNS)
It is very difficult to remember a set of numbers (IP address) to connect to the Internet. The Domain Naming Service(DNS) is used to overcome this problem. It maps one particular IP address to a string of characters. For example, www.java2novice.com implies com is the domain name reserved for US commercial sites, java2novice is the name of the company and www is the name of the specific computer, which is java2novice's server.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected] or you can comment on the page.

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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