Spring Boot FAQ: Top Questions

13. What is Spring Boot CLI and how is it used?

Spring Boot CLI (Command Line Interface) is a tool to run and test Spring Boot applications written in Groovy. It enables rapid prototyping without full Java project setup.

🗺️ Setup:

Install using SDKMAN or direct download.
Create a Groovy file with Spring annotations.
Run using spring run app.groovy.

📥 Example:

@RestController
class HelloController {
  @RequestMapping("/")
  String home() {
    "Hello from CLI"
  }
}

🏆 Expected Output:

Starts a web server on default port 8080 and serves message.

🛠️ Use Cases:

Fast prototyping and testing.
Educational demos and workshops.

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