Spring Mvc Thymeleaf Error: Parameter Conditions Not Met For Actual Request Parameters

I'm new to Spring MVC Thymeleaf and trying to get some simple input/output working. The below code is supposed to accept text input, then output it when the 'Submit' button is pre

Solution 1:

In the controller class you are using "params={"submitInput"}" which means the url expects that parameter. Seems like you are not passing expected parameter "submitInput" in url, like

localhost:8080/{appname}/greeting?submitInput={someinput}