Spring MVC: How to Handle Redirects After Successful Form Submission with Flash Attributes?
I'm getting frustrated with I'm experimenting with Hey everyone, I'm running into an issue that's driving me crazy... I'm currently working on a Spring MVC application where I need to handle form submissions and then redirect users to a different page after processing the form. I'm using Spring Boot 2.5.4 and I want to pass some success messages to the redirected page. However, I'm working with issues with Flash Attributes not working as expected. I have a simple form in my Thymeleaf template for user registration, and once the user submits this form, I want to redirect them to a welcome page with a success message. Here’s the code snippet from my controller: ```java @Controller public class RegistrationController { @PostMapping("/register") public String registerUser(@ModelAttribute User user, RedirectAttributes redirectAttributes) { // Simulate saving the user to the database userService.save(user); redirectAttributes.addFlashAttribute("message", "Registration successful!"); return "redirect:/welcome"; } } ``` Then, on the welcome page, I’m trying to retrieve this message: ```html <!DOCTYPE html> <html xmlns:th="http://www.thymeleaf.org"> <head> <title>Welcome</title> </head> <body> <h1>Welcome!</h1> <div th:if="${message}" th:text="${message}"></div> </body> </html> ``` However, when I redirect to the welcome page, the message does not appear. I've verified that the user registration part works correctly and that the redirect is happening. I've also ensured that the Thymeleaf dependency is correctly set up in my `pom.xml`: ```xml <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> ``` I've tried adding the `@SessionAttributes` annotation to my controller, but that didn’t seem to solve the scenario either. The flash attributes are not showing up after the redirect, and I’m not seeing any behavior messages in the console. What am I missing? Is there any specific configuration I need to enable in order to use Flash Attributes properly with redirects in Spring MVC? Any help would be greatly appreciated! I'm working in a Ubuntu 22.04 environment. What's the best practice here? For context: I'm using Java on CentOS. Any pointers in the right direction?