How to run Spring Boot Application?

How to Run a Spring Boot Application

Step 1: Create a New Spring Boot Project

To run a Spring Boot application, you first need to create a new project. You can do this using the Spring Initializr web tool or by using the Spring Tool Suite (STS) or Spring Boot CLI.

Table of Contents

Using Spring Initializr Web Tool

Go to the Spring Initializr web tool.

Choose the Spring Boot version you want to use.

Select the project type (e.g., web, data, or command-line).

Choose the dependencies you want to include (e.g., Spring Web, Spring Data JPA, or Spring H2).

Click on the "Generate Project" button to download the project.

Using Spring Tool Suite (STS)

Download and install the Spring Tool Suite (STS) from the official website.

Launch the STS IDE.

Create a new project by selecting "Spring Boot" from the project template.

Choose the dependencies you want to include (e.g., Spring Web, Spring Data JPA, or Spring H2).

Click on the "Create Project" button to create the project.

Using Spring Boot CLI

Open a terminal or command prompt.

Install the Spring Boot CLI using the following command: mvn install -DskipTests=true

Create a new Spring Boot project using the following command: mvn spring-boot:run

Step 2: Configure the Project

Once you have created a new project, you need to configure it to run correctly. Here are some important settings to configure:

Spring Boot Application Properties

application.name: The name of your application.

application.version: The version of your application.

application.properties: The properties file for your application.

application.yml: The properties file for your application (optional).

Spring Boot Configuration Classes

application.properties: The properties file for your application.

application.yml: The properties file for your application (optional).

WebMvcConfigurerAdapter: The configuration class for the Spring MVC controller.

WebMvcConfigurer: The configuration class for the Spring MVC view resolver.

Database Configuration

spring.datasource.url: The URL of your database.

spring.datasource.username: The username of your database.

spring.datasource.password: The password of your database.

spring.jpa.hibernate.ddl-auto: The DDL auto configuration for your database.

Security Configuration

spring.security.enabled: The security configuration for your application.

spring.security.user.name: The username for your user.

spring.security.user.password: The password for your user.

Logging Configuration

spring.jpa.show-sql: The logging configuration for your database.

spring.jpa.hibernate.format_sql: The logging configuration for your database.

Environment Variables

spring.profiles.active: The active profile for your application.

spring.profiles.active: The active profile for your application (optional).

Step 3: Run the Application

Once you have configured your project, you can run it using the following commands:

Spring Boot CLI

mvn spring-boot:run

Spring Tool Suite (STS)

Right-click on your project and select "Run As" > "Spring Boot Application".

Click on the "Run" button to run the application.

Spring Initializr Web Tool

Click on the "Run" button to run the application.

Step 4: Test the Application

Once the application is running, you can test it using the following tools:

Postman

Open Postman and create a new request.

Set the URL to your application’s URL.

Set the method to GET or POST.

Set the headers and body as needed.

JUnit

Create a new test class for your application.

Write test methods to test your application’s functionality.

Use the @SpringBootTest annotation to enable Spring Boot testing.

Spring Boot Actuator

Enable the Spring Boot Actuator by adding the following dependency to your pom.xml file:

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-actuator</artifactId>

</dependency>

Start your application and enable the Spring Boot Actuator.

Use the following command to start the actuator:
```
mvn spring-boot:run -Dactuallink.enabled=true
```

Use the following command to start the actuator:

mvn spring-boot:run -Dactuallink.enabled=true -Dactuallink.port=8080

Conclusion

Running a Spring Boot application is a straightforward process that involves creating a new project, configuring it, and running it. By following the steps outlined in this article, you can create a Spring Boot application that meets your needs. Remember to test your application thoroughly to ensure it is working correctly.

Table: Spring Boot Application Properties

Property	Description
application.name	The name of your application
application.version	The version of your application
application.properties	The properties file for your application
application.yml	The properties file for your application (optional)

Table: Spring Boot Configuration Classes

Class	Description
application.properties	The properties file for your application
application.yml	The properties file for your application (optional)
WebMvcConfigurerAdapter	The configuration class for the Spring MVC controller
WebMvcConfigurer	The configuration class for the Spring MVC view resolver

Table: Database Configuration

Property	Description
spring.datasource.url	The URL of your database
spring.datasource.username	The username of your database
spring.datasource.password	The password of your database
spring.jpa.hibernate.ddl-auto	The DDL auto configuration for your database

Table: Security Configuration

Property	Description
spring.security.enabled	The security configuration for your application
spring.security.user.name	The username for your user
spring.security.user.password	The password for your user

Table: Logging Configuration

Property	Description
spring.jpa.show-sql	The logging configuration for your database
spring.jpa.hibernate.format_sql	The logging configuration for your database

Table: Environment Variables

Property	Description
spring.profiles.active	The active profile for your application
spring.profiles.active	The active profile for your application (optional)

Table: Command-Line Arguments

Argument	Description
-Dspring.profiles.active	The active profile for your application
-Dspring.profiles.active	The active profile for your application (optional)