What is @ModelAttribute in Spring MVC?

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What is the purpose and usage of @ModelAttribute in Spring MVC?

Dec 18, 2018 in Java by Sushmita
• 6,840 points
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1 answer to this question.

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@ModelAttribute refers to a property of the Model object (the M in MVC ;) so let's say we have a form with a form backing object that is called "Person" Then you can have Spring MVC supply this object to a Controller method by using the @ModelAttribute annotation:

public String processForm(@ModelAttribute("person") Person person){
    person.getStuff();
}

On the other hand the annotation is used to define objects which should be part of a Model. So if you want to have a Person object referenced in the Model you can use the following method:

@ModelAttribute("person")
public Person getPerson(){
    return new Person();
}
This annotated method will allow access to the Person object in your View, since it gets automatically added to the Models by Spring.
answered Dec 18, 2018 by Daisy
• 8,040 points

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