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Table of contents
1.
Introduction
2.
What is Spring Boot CLI?
3.
Installing Spring Boot CLI 
4.
Spring Boot CLI Features
5.
Spring Boot CLI Working 
6.
Spring Boot CLI Example
7.
FAQs
8.
Key Takeaways
Last Updated: Mar 27, 2024

Spring Boot CLI

Author Juhi Sinha
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Introduction

Time is a great matter of concern for every developer. Spring Boot CLI help in developing quick Spring Framework applications and reduces the development time.

In this article, we are going to learn Spring Boot CLI in detail. So, without any further ado, let's get started!

See also, spring mvc vs spring boot

What is Spring Boot CLI?

The Spring Boot CLI (Command Line Interface) in Spring Framework is a command-line tool that allows us to run Groovy scripts. The Spring Boot CLI is the quickest way to get a Spring framework application up and running. It enables us to create Spring Framework applications quickly. Groovy scripts, which are similar to Java but without the boilerplate code, are used by Spring Boot CLI. This aids in the bootstrapping of a new project as well as the creation of custom commands for it.

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Installing Spring Boot CLI 

It is a tool that we can download from the Spring Framework's official website. Let's take a look at how to set up Spring Boot CLI step by step:

Step 1: We can get the most recent version of Spring Boot CLI API as a ZIP archive from the Spring Boot CLI API website:

https://repo.spring.io/release/org/springframework/boot/spring-boot-cli/.

 

Step 2: Unpack the zip distribution into a convenient location after downloading the installation.

If we don't properly set the CLASSPATH variable on this directory, we might have problems running our application.

Alternatively, we can use the command prompt to temporarily set the path to run the spring boot application, as shown below:

E:/Test/> set path=E:\Test\spring-1.5.8.RELEASE\bin;%PATH%

 

Step 3: To verify the installation, we have to type the following command at the command prompt:

E:/Test/> spring --version

 

It should print the following output to confirm that the installation was successful:

Spring CLI v1.5.8.RELEASE

 

Spring Boot CLI Features

Some of the key features of Spring Boot CLI are as follows:

  • Spring Boot CLI provides a command-line interface for running and testing your Spring Boot application.
  • It comes with a Groovy compiler as well as a Grape dependency manager.
  • It resolves dependencies and runs the application using Spring Boot Starter and AutoConfigurate components.
  • Groovy Scripts are supported without the need for an external installation.

Spring Boot CLI Working 

To internally resolve all dependencies and execute the application, Spring Boot CLI uses the Spring Boot Starter and Spring Boot AutoConfigurate components.

Because of the Groovy and Grape dependency managers in the CLI, dependencies are resolved automatically.

Grape is an embedded JAR dependency manager in Groovy, and Groovy is an object-oriented dynamic programming language. As a result, groovy scripts can be run with less boilerplate code.

Because Spring Boot CLI automatically detects which dependency JARs are to be downloaded based on the classes and annotations used in code, Spring Boot CLI avoids a lot of boilerplate code and Spring Configuration, reducing development time.

Spring Boot CLI Example

We'll create a simple Spring Boot MVC RestController in this example.

Let us write a groovy script as the CLI supports them.

This is the DemoCLI.groovy code:

@RestController
class DemoCLI {
   @RequestMapping("/get-message")
   String greetHello() {
       "Welcome to Coding Ninjas!"
   }
}

 

It's a simple request handler method annotated REST Controller class.

Must Read Spring Tool Suite

FAQs

  1. What is Spring Boot CLI?
    The Spring Boot CLI (Command Line Interface) in Spring Framework is a command-line tool that allows us to run Groovy scripts. The Spring Boot CLI is the quickest way to get a Spring framework application up and running.
     
  2. How does Spring Boot CLI reduce the time?
    Spring Boot CLI automatically detects which dependency JARs are to be downloaded based on the classes and annotations used in the code. Spring Boot CLI avoids a lot of boilerplate code and Spring Configuration. Hence, reducing development time.
     
  3. State the different features of Spring Boot CLI.
    The different features of Spring Boot CLI are as follows:
  • Spring Boot CLI provides a command-line interface for running and testing your Spring Boot application.
  • It comes with a Groovy compiler as well as a Grape dependency manager.
  • It resolves dependencies and runs the application using Spring Boot Starter and AutoConfigurate components.
  • Groovy Scripts are supported without the need for an external installation.

 

Key Takeaways

In this article, we've learned about the Spring framework Boot CLI. Also, we have studied the features, working, and installation of Spring Boot CLI.

If you are eager to learn advanced front-end web development, Coding Ninjas is here with one of the best courses available, which you can find here. You can also consider our Spring Boot Course to give your career an edge over others.

 

Thank you for reading!

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