Simple CLI App With Spring Boot

Building simple CLI app to update database records

Introduction

Spring boot provides Spring Shell using which we can a build CLI app. CLI app’s are interactive way to build the application without needing web ui interface.

In this article we will use Spring Shell to build CLI app to bulk update accounts table permission.

Dependency

Lets first add the spring-shell-starter dependency:

Use Case

We will build simple command line app for updating records in the accounts table. 

At first lets get all the accounts by the permission id equals to 2, since that represents admin permission.

We want to change the permission from admin to reader which has id = 3

Now we will log the prompt message to continue if all looks good:

For accepting users input :

If user accepts true then we will bulk update permission otherwise exit without doing anything:

Here is the Entire logic:

We have to mark the class as @Command and method as @Command

Now if we run our spring boot application, it will enter provide us the shell to execute command:

Now we can run our method to execute the commands :

Conclusion

In this article we build simple CLI app using Spring Shell that bulk updates the record in the database. Spring Shell is a robust and feature rich framework that we can leverage to build more advance CLI apps.

Read more about it here

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