Dynamic form and data binding with Spring MVC

Question

In my Spring MVC application I need to implement a dynamic questionnaire form: I have N questions and for each I have 3 options.

So in my page I\'ll have something like

Answer 1

This class is my model attribute:

public class Questionnaire {
    private List questions = new ArrayList<>();
    private List answers = new ArrayList<>();

    // set + get
}

And:

public class Question {
    private int id;
    private String text;

    // set+ get

}

public class Answer {
    private int questionId;
    private int value;

    // set + get
}

I populate questions list before I put it into model.

In my page I use this code:

    

    ${question.text} 
        
            
        
        
            
        
    

Posting this form I get a fully populated questionnaire instance in my controller.

NOTE I found this post very helpful to solve my problem.