Generating Spring Boot Skeleton Project via Spring Boot CLI

Using the Spring Boot CLI to Generate Spring Boot Skeleton Project.

Introduction

Spring Boot CLI is a command line tool that you can use if you want to quickly develop a Spring application. It lets you run Groovy scripts, which means that you have a familiar Java-like syntax without so much boilerplate code. You can also bootstrap a new project or write your own command for it.

Command Language Interpreter (CLI), also known as command-line user interface, console user interface and character user interface (CUI), is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text (command lines). A program which handles the interface is called a command language interpreter or shell (computing)

Goals

1. Download & Install Spring Boot CLI
2. Using the CLI to Generate Spring Boot Skeleton Project

Minimum Requirements

• Java SDK v1.8 or higher

Step 1 - Download & Install Spring Boot CLI

• Spring Boot CLI Download Link

• Installation Steps

  • Set SPRING_HOME to point to the Spring CLI folder
  • Add SPRING_HOME/bin to your PATH environment variable
  • To test if you have successfully installed the CLI you can run either of the following commands:
    • spring --version or spring version

• No specific environment variables are required to run the CLI

Step 2 - Using the CLI to Generate Spring Boot Skeleton Project

• spring
  A help screen is displayed.

• spring help
  Get more details about any of the supported commands.

• spring init --dependencies=web,data-jpa my-example-project
  Create a new maven based spring boot project, my-example-project with spring-boot-starter-web and spring-boot-starter-data-jpa dependencies.

• spring init --list
  List all the capabilities of Spring Starter.

• spring init --build=maven --java-version=1.8 --dependencies=web,data-jpa --packaging=jar my-example-project.zip
  Create a maven project that uses Java 8 and jar packaging.

• spring shell
  Command to launch an integrated shell on a Windows machine. From inside the embedded shell, you can run other commands directly. $ version

Running the Jar

• Java -jar Application-Jar-Name.Jar
  Running the Spring Boot Application Jar

• Java -jar -Dserver.port=9090 Application-Jar-Name.Jar
  Running Multiple Instances of Spring Boot Project on Different Ports

Other Commands

• jcmd
  lists all running Java processes

• Taskkill /PID PROCESS_ID_OF_RUNNING_APP /F
  replace the PROCESS_ID_OF_RUNNING_APP with the actual process id of the running jar found out from executing the previous command to shutdown the running jar.

• jps -lv
  displays information about running java processes

• echo %JAVA_HOME%
  prints environment variable JAVA_HOME