Handling errors in REST Controllers with Spring Boot

CLONED from https://github.com/mechero/spring-boot-rest-exceptions

Experimenting with custom error responses

Testing

Get DATA

curl --location --request GET 'http://localhost:8080/superheroes/2' -I
curl --location --request GET 'http://localhost:8080/superheroes/3' -I
curl --location --request GET 'http://localhost:8080/superheroes/4' -I

Test error handlers

405

curl --location --request GET 'http://localhost:8080/superheroes/1' -I

404

curl --location --request GET 'http://localhost:8080/superheroes/1000' -I

Goal

This sample code shows how configure a Spring Boot application to properly handle all exceptions and create your custom error format.

Check the blog post on ThePracticalDeveloper site for the complete guide with instructions.

And, if you find this code useful, please give a star to the repo!

Custom error handling

First, you'll find in this code an example of a basic approach to map exceptions to status codes in Spring Boot using a @RestControllerAdvice with @ExceptionHandler methods.

However, the most interesting part is the injection of a customized ErrorController implementation and the overridden ErrorAttributes to achieve consistent responses when dealing with errors.

For this example, I used the Google JSON Style Guide but you can use any other known error formatting or create your own one.

Check the guide for more details.