So i'm currently taking a course on udemy about Spring MVC. In the current section there's a simple form being build to submit firstname and lastname.
Hey user, may i know your name?
<form:form action="hello" modelAttribute="info">
First Name: <form:input path="firstName" />
Last Name: <form:input path="lastName" />
<input type="submit" value="Submit" />
</form:form>
The input gets submitted via an Information Class to the HelloController
@Controller
public class HelloController {
@RequestMapping("/hello")
public ModelAndView helloWorld(@RequestAttribute("info") Information userInfo) {
ModelAndView model = new ModelAndView("hello");
model.addObject("firstName", userInfo.getFirstName());
model.addObject("lastName", userInfo.getLastName());
return model;
}
@RequestMapping("/")
public ModelAndView homepage() {
ModelAndView model = new ModelAndView("index", "info", new Information());
return model;
}
Information Class:
public class Information {
private String firstName;
private String lastName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
Next the informatiion Class should be forwarded to the view file hello.jsp
<body>
<h2> Hello ${firstName} ${lastName} </h2><br/>
</body>
I thought this is actually rather simple, but after submitting the form i get the exception "Missing request attribute 'info' of type Information". I double-checked my code against the code from the udemy instructor, but couldn't find any errors. Can someone help?
On a sidenote, i don't know if it has anything todo with this error, but after adding @Controllerto the Class, auto-completion in eclipse stops working for this Class. After removing the annotation auto-completion starts towork again.
You are using the wrong annotation. @RequestAttribute is for retrieving attributes set on the HttpServletRequest using setAttribute. You however want to bind request parameters to an object, for that you should use the @ModelAttribute annotation instead.
@RequestMapping("/hello")
public ModelAndView helloWorld(@ModelAttribute("info") Information userInfo) { ... }
Changing the annotation will make it work.
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