Access to class attributes with jstl

Question

In my spring project, my view receive from controller a Map object like this:

Map<String, List<?>>

which I access in my jsp code this way:

                <c:forEach var="field" items="${values[item]}">
                    <c:out value="${field}"/> <br/>
                </c:forEach>

Considering the class indicatd by ? it's a regular POJO class, how I can access the attributes from this class in my jsp? In other words, what the correct instruction I should use to replace:

                    <c:out value="${field}"/> <br/>

because with this I am getting something like that when I open the page in the browser:

com.spring.loja.model.categoria.persistence.model.Categoria@41c0e228

UPDATE

I try use this, following answer posted in this topic:

<c:out value="${field.name}"/>

but I wonder if there is a way to use this method instead:

@Override
protected String getArgument(int ordem) {
    switch(ordem) {
     case 0: return "Id";
     case 1: return "Login";
     case 2: return "Senha";
     case 3: return "Nome";
     case 4: return "Sobrenome";
     case 5: return "E-Mail";
     case 6: return "Autorizacao";
     default: return null;
     }
}

and this way be able to avoid the use of the name of the getter method (It's a generic jsp page, used by several views, and I don't know which method will be used)

Answer 1

If this POJO has for an example getName() getter, then you can access name field using:

<c:out value="${field.name}"/>

If you use Servlet +3.0 version, then you can invoke method from EL. Then you can try something like that:

<c:out value="${field[field.getArgument(2)]}"/>