Java Validation

Learn how to use bean validation aka Jakarta Validation to perform input validation in Java applications. See examples of predefined constraints, custom constraints, and error handling with Hibernate Validator.

For this, Java has Bean Validation, which is a Java EE standard that allows us to validate. With the help of default annotations or custom validations, we can put constraints on the data and

Learn how to use Hibernate Validator to validate Java beans using Jakarta bean validation API. See examples of annotations, constraints, messages, interpolation and custom validators.

Java validation stands as a critical aspect of building reliable applications. Let's examine advanced validation techniques that I've implemented across various enterprise projects. Bean Validation with Jakarta Validation API represents the foundation of Java validation. This declarative approach simplifies data validation through annotations.

While it is certainly possible to implement a single Validator class to validate each of the nested objects in a rich object, it may be better to encapsulate the validation logic for each nested class of object in its own Validator implementation. A simple example of a quotrichquot object would be a Customer that is composed of two String properties a first and a second name and a complex

Learn how to use the Java Bean Validation API with Spring Framework to validate domain model properties with constraints and metadata. See examples of configuration, custom constraints, method validation, and error handling.

Any validation failures are gracefully handled and can be displayed by the hmessages tag. Any managed bean that contains Bean Validation annotations automatically gets validation constraints placed on the fields on a JavaServer Faces application's web pages. For more information on using validation constraints, see the following

This tutorial covers various Java validation techniques, including built-in libraries, annotations, and custom validation methods. Whether you are developing a web application or a desktop program, understanding how to validate input effectively will help enhance your application's reliability and user experience.

JSR 380 is a specification of the Java API for bean validation, part of Jakarta EE and JavaSE. It ensures that the properties of a bean meet specific criteria, using annotations such as NotNull, Min, and Max. This version requires Java 17 or higher because it uses Spring Boot 3.x, which brings Hibernate-Validator 8.0.0.

Validating users' input is a common functionality in most of our applications. In the Java Ecosystem, we specifically use the Java Standard Bean Validation API to support this, which is well integrated with Spring from version 4.0 onward. The Valid and Validated annotations stem from this Standard Bean API.