Spring Shell is a framework within the Spring ecosystem that provides a powerful and extensible command-line interface (CLI) for building interactive shell applications in Java. It simplifies the development of command-line tools and allows you to create robust and user-friendly CLI applications while leveraging the features and benefits of the Spring Framework.
Key features and components of Spring Shell include:
Here’s a simplified example of how to create a basic Spring Shell application with a custom command:
import org.springframework
.shell.standard.ShellComponent;
import org.springframework
.shell.standard.ShellMethod;
@ShellComponent
public class MyShellCommands {
@ShellMethod("Add two numbers.")
public int add(int a, int b) {
return a + b;
}
}
In this example, a Spring Shell component is defined with a custom add command that takes two integer arguments and returns their sum.
To run the Spring Shell application, you would typically package it as a JAR or executable, and users can then interact with it via the command-line interface.
Spring Shell is a useful framework for creating command-line applications, administrative tools, or interactive utilities with a consistent and user-friendly interface. It’s particularly valuable when you need to provide users with a CLI for controlling or managing your application or system.
