Accessing a value in Struts ActionForm from JSP

Question

I am a Struts 1.3.10 newbie and I have an issue where I have an Action called RegistrationAction as follows:

    public final class RegistrationAction extends Action{

        @Override
        public ActionForward execute(ActionMapping mapping,
                                     ActionForm form,
                                     HttpServletRequest request,
                                     HttpServletResponse response)
        throws Exception{

           RegistrationForm formBean = (RegistrationForm) form;
           String userid = formBean.getUserid();
           String pwd = formBean.getPassword();

The userid and password are then saved to a HashMap<String, String> with attributes _userid and pwd.

RegistrationAction then calls a JSP if the validation of the userid and password are successful. But what I am finding is that in the JSP, the userid is not being displayed using the following code:

    <h1>Hello  <bean:write name="RegistrationForm" property="_userid" />!</h1>

The matching ActionForm RegistrationForm contains the _userid field as below:

    public final class RegistrationForm extends ActionForm{

        private String _userid = null;

        public String getUserid(){ return _userid; }
        public void   setUserid(String userid){ _userid = userid; }

        ...

I know that an instance of RegistrationForm is being populated because I can retrieve the entered _userid via:

    if(err == RegistrationModel.OK){
            System.out.println("Here " + model.getUserid()); 

I thought that a reference to the RegistrationForm in the JSP such as:

<h1>Hello <bean:write name="RegistrationForm" property="_userid" />!</h1>

Would work.

Can anyone suggest where I'm wrong?

Thanks to the respondents. The page works now.

Solution

The JSP tags, and the JSP EL, access bean properties, and not bean fields. So if you pass _userId, it will look for a getter method called get_userId(). Since you want to access the getter getUserId(), you need to use userId inside the tag.

Comments

[Lion]

_userid is terribly a hateful name of a property that doesn't confirm the naming conventions of Java. You shouldn't be using it anymore.

[Mr Morgan]

Agreed. _userid is simply a name used in the Struts example I was following which never worked properly anyway until this question was posted, and another one yesterday. Now that I have the example working, I will be changing the name to userName or some such.