You’ll build a simple Spring MVC application that take user input and checks the input using standard validation annotations.
You’ll also see how to display the error message on the screen so the user can re-enter a valid input. You can use any build system you like when building apps with Spring, but the code you need to work with Gradle and Maven is included here. Post Mapping; import org.servlet.config.annotation. View Controller Registry; import org.servlet.config.annotation. Web Mvc Configurer Adapter; @Controller public class Web Controller extends Web Mvc Configurer Adapter and are resolved as views by stripping the '.html' suffix off the file name.
In a Java SE environment, however, you have to add an implementation as dependency to your POM file.
For instance, you can add the following two dependencies to use the JSR 341 reference implementation: Bean Validation defines integration points with CDI (Contexts and Dependency Injection, JSR 346).
Like most Spring Getting Started guides, you can start from scratch and complete each step, or you can bypass basic setup steps that are already familiar to you. If you’re not familiar with either, refer to Building Java Projects with Gradle or Building Java Projects with Maven. Thymeleaf settings can be changed and overridden in a variety of ways depending on what you need to achieve, but the details are not relevant to this guide.