The Spring Boot CLI is a command line tool and it allows us to run the Groovy scripts. This is the easiest way to create a Spring Boot application by using the Spring Boot Command Line Interface. You can create, run and test the application in command prompt itself.
This section explains you the steps involved in manual installation of Spring Boot CLI. For further help, you can use the following link: https://docs.spring.io/springboot/ docs/current-SNAPSHOT/reference/htmlsingle/#getting-started-installing-springboot
You can also download the Spring CLI distribution from the Spring Software repository at: https://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#getting-started-manual-cli-installation
For manual installation, you need to use the following two folders −
• spring-boot-cli-2.0.0.BUILD-SNAPSHOT-bin.zip
• spring-boot-cli-2.0.0.BUILD-SNAPSHOT-bin.tar.gz
After the download, unpack the archive file and follow the steps given in the install.txt file. Not that it does not require any environment setup.
In Windows, go to the Spring Boot CLI bin directory in the command prompt and run the command spring –-version to make sure spring CLI is installed correctly. After executing the command, you can see the spring CLI version as shown below −

Run Hello World with Groovy
Create a simple groovy file which contains the Rest Endpoint script and run the groovy file with spring boot CLI. Observe the code shown here for this purpose −
@Controller
class Example {
@RequestMapping(“/”)
@ResponseBody
public String hello() {
“Hello Spring Boot”
}
}
Now, save the groovy file with the name hello.groovy. Note that in this example, we saved the groovy file inside the Spring Boot CLI bin directory. Now run the application by using the command spring run hello.groovy as shown in the screenshot given below −

Once you run the groovy file, required dependencies will download automatically and it will start the application in Tomcat 8080 port as shown in the screenshot given below −

Once Tomcat starts, go to the web browser and hit the URL http://localhost:8080/ and you can see the output as shown.

So, this brings us to the end of blog. This Tecklearn ‘How to create a Spring Boot Application using Maven and Gradle’ blog helps you with commonly asked questions if you are looking out for a job in Java Programming. If you wish to learn Spring Boot and build a career Java Programming domain, then check out our interactive, Java and JEE Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

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What you will Learn in this Course?

Introduction to Java
• Java Fundamentals
• Introduction to Java Basics
• Features of Java
• Various components of Java language
• Benefits of Java over other programming languages
• Key Benefits of Java
Installation and IDE’s for Java Programming Language
• Installation of Java
• Setting up of Eclipse IDE
• Components of Java Program
• Editors and IDEs used for Java Programming
• Writing a Simple Java Program
Data Handling and Functions
• Data types, Operations, Compilation process, Class files, Loops, Conditions
• Using Loop Constructs
• Arrays- Single Dimensional and Multi-Dimensional
• Functions
• Functions with Arguments
OOPS in Java: Concept of Object Orientation
• Object Oriented Programming in Java
• Implement classes and objects in Java
• Create Class Constructors
• Overload Constructors
• Inheritance
• Inherit Classes and create sub-classes
• Implement abstract classes and methods
• Use static keyword
• Implement Interfaces and use it
Polymorphism, Packages and String Handling
• Concept of Static and Run time Polymorphism
• Function Overloading
• String Handling –String Class
• Java Packages
Exception Handling and Multi-Threading
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• Introduction to multi-threading in Java
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File Handling in Java
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• File Handling in Java
Java Collections
• Wrapper Classes and Inner Classes: Integer, Character, Boolean, Float etc
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• Collections: ArrayList, Vector, HashSet, TreeSet, HashMap, HashTable
Java Database Connectivity (JDBC)
• Introduction to SQL: Connect, Insert, Update, Delete, Select
• Introduction to JDBC and Architecture of JDBC
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• Batch Processing Transaction
• Management: Commit and Rollback
Java Enterprise Edition – Servlets
• Introduction to J2EE
• Client Server architecture
• URL, Port Number, Request, Response
• Need for servlets
• Servlet fundamentals
• Setting up a web project in Eclipse
• Configuring and running the web app with servlets
• GET and POST request in web application with demo
• Servlet lifecycle
• Servlets Continued
• Session tracking and filter
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Java Server Pages (JSP)
• Fundamentals of Java Server Page
• Writing a code using JSP
• The architecture of JSP
• JSP Continued
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• JSP directives
• Introduction to JavaBeans
• ServletConfig and ServletContext
• Servlet Chaining
• Cookies Management
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Hibernate
• Introduction to Hibernate
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• ORM features
• Hibernate as an ORM framework
• Hibernate features
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POJO (Plain Old Java Object)
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Spring
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