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Building Scalable Applications with Thymeleaf and Spring Boot

Posting Data

Understand how to use Spring MVC controllers to post data using @PostMapping. Learn to handle form data, implement the Post/Redirect/Get pattern to avoid duplicate submissions, and explore support for all HTTP methods in Spring Boot for scalable application development.

We'll cover the following...

Posting data

We saw how to use @GetMapping to display information to the user. Inevitably, the user will also want to change data. In web terms, we can do this by using HTTP POST with a <form>.

Suppose we have a form to change the name of a team. The controller method to make that possible could look something like this:

Java
@Controller
@RequestMapping("/teams")
public class TeamController {
...
    @PostMapping("/{id}") 
    public String editTeamName(@PathVariable("id") String teamId,
                               @ModelAttribute("editTeamFormData") EditTeamFormDataformData) { 
        service.changeTeamName(teamId, formData.getTeamName()); 
        return "redirect:/teams/all"; 
    }
}
  • Use the @PostMapping annotation to indicate that a POST call to /teams/<id> should be handled by this method.
  • The editTeamFormData is
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