- Spring Boot Tutorial
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Application Runner and Command Line Runner interfaces lets you to execute the code after the Spring Boot application is started. You can use these interfaces to perform any actions immediately after the application has started. This chapter talks about them in detail.
Application Runner
Application Runner is an interface used to execute the code after the Spring Boot application started. The example given below shows how to implement the Application Runner interface on the main class file.
Now, if you observe the console window below Hello World from Application Runner, the println statement is executed after the Tomcat started. Is the following screenshot relevant?
Command Line Runner
Command Line Runner is an interface. It is used to execute the code after the Spring Boot application started. The example given below shows how to implement the Command Line Runner interface on the main class file.
Look at the console window below 'Hello world from Command Line Runner' println statement is executed after the Tomcat started.
last modified July 6, 2020
Spring Boot CommandLineRunner tutorial shows how to run beans usingCommandLineRunner interface.
Spring is a popular Java application framework and Spring Boot is an evolution of Spring that helps create stand-alone, production-grade Spring based applications easily.
CommandLineRunner
CommandLineRunner 1password 6 8 3 – powerful password manager. is an interface used to indicate that a bean should run when it is contained within a SpringApplication. A Spring Boot application can have multiple beans implementing CommandLineRunner. These can be orderedwith @Order.
Spring Boot CommandLineRunner example
The following application demonstrates the usage of CommandLineRunner. It creates cities in a H2 in-memory database and later lists them.
This is the project structure.
This is the Maven pom.xml file. We use the H2 database and Spring Data JPA.
Ip Runner For Booting
The application.properties is the main configuration file in Spring Boot.With spring.main.banner-mode=off we turn off the Spring banner.
This is the City model, which has the following properties: id, name, and population.
Download native instruments raum 1 0 0. CityRepository has some generic CRUD operations on a repository for a City.
By implementing the CommandLineRunner, the run() method of the MyRunner class will be executed after the applicationstarts.
MyRunner is also decorated with @Component, so it willbe autodetected and registered as well.
Boot Runner Config
With the @Autowired annotation, we inject the CityRepository beaninto the repository field.
In the run() method, we create three cities and later find all of them and print them to the console.
Application is the entry point which sets up Spring Bootapplication.
Boot Runner Software
We run the application with mvn -q spring-boot:run.
Boot Runner Uninstall
In this tutorial, we have shown how to use CommandLineRunner interface to create a bean that is run when the application starts.
List Spring Boot tutorials.
