In the controller, add a @ModelAttribute method returning a Map object that contains the select field options:

@ModelAttribute("countries")
public Map<String, String>countries() {
  Map<String, String> m = new HashMap<String, String>();
  m.put("us", "United States");
  m.put("ca", "Canada");
  m.put("fr", "France");
  m.put("de", "Germany");
  return m;
}

If a default value is necessary, use a String attribute of the default object (refer to the Setting a form's default values using a model object recipe) initialized with one of the Map keys:

user.setCountry("ca");

In the JSP, use a form:select element initialized with the @ModelAttribute Map:

<form:select path="country" items="${countries}" />

In the controller that processes the form submission, make sure that the @ModelAttribute object (the one...