Add Spring Boot Custom Validation Module #18873
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Contributor
Author
|
Refactored package structure to com.baeldung.validation.custommessage as suggested. All classes and tests have been moved, and package declarations updated. Let me know if further adjustments are needed. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
This pull request introduces a Spring Boot module that demonstrates custom validation using
@Valid,@RequestBody, andBindingResult. It provides a reproducible example for students and collaborators to understand field-level validation and structured error handling in REST APIs.Features
UserDTOwith annotations:@Email,@Size,@NotBlank,@MinUserControllerwith validation logic and error response formattingLogbackPingclass to ensure compatibility withlogback-corepackagingSpringBootCustomValidationApplication.javaHow to Test
curl -X POST http://localhost:8081/register \ -H "Content-Type: application/json" \ -d "{\"email\":\"invalid-email\",\"password\":\"short\"}" ### Expected response: [ "Please provide a valid email address.", "Name must not be blank.", "Age must be at least 18." ] ### Notes - No external configuration required - Designed for onboarding and reproducibility - Ideal for student learning and collaborative extension