Property Editor Spring MVC

[alexios.7]

i'm trying to create a listbox where the user will be able to selct multiply values. My view is this:


View:
<td>
<form:label path="role">Role:</form:label></td>
<td>
<select name="role" multiple="true">
<OPTION VALUE="admin">admin</OPTION>
<OPTION VALUE="user">user</OPTION>
</select>
</td>

Model:

.
.
fields
.
private ArrayList<Role> role;

get/set

the Role class:

public class Role {
private String role;

public String getRole() {
return role;
}

public void setRole(String role) {
this.role = role;
}
}

So according to this post http://stackoverflow.com/questions/3...eckboxes-issue, i create a new class which is the following:

public class RoleEditor extends PropertyEditorSupport {

@Override
public String getAsText() {
return ((Role) getValue()).getRole();
}

@Override
public void setAsText(String text) throws IllegalArgumentException {
setValue(text);
}
}

And finally in the controller class i add this:

@InitBinder
@RequestMapping(value = "/log", method = RequestMethod.POST)
public String setRegistrationForm(@ModelAttribute("logAtr") Register register,
Registration registration,Model model,HttpSession session,WebDataBinder b) {

b.registerCustomEditor(Role.class, new RoleEditor());
.
.
return "aView"
}

But i still take this exception: Cannot convert value of type [java.lang.String[]] to required type [java.util.ArrayList] for property 'roles': no matching editors or conversion strategy found]
I try to follow the example which seems to be correct but the problem didn't solve. What i'm doing wrong?

[manish.in.java]

According to the Spring documentation, controller methods annotated with @InitBinder do not support form/ command objects and do not return any value. You should try changing your code as follows:

@InitBinder
public void initBinder(final WebBinder binder)
{
    binder.registerCustomEditor(Role.class, new RoleEditor());
}

@RequestMapping(value = "/log", method = RequestMethod.POST)
public String setRegistrationForm(@ModelAttribute("logAtr") Register register, Registration registration,Model model,HttpSession session)
{
    ...
    return "aView";
}