How to get the value of sessionbean's properties in JSP?

Question

Hi,All
I want to invoke setInterval() in JSP,and invoke clearInterval() when sessionbean's property is not null.But I don't know how to get the sessionbean's property.
Thanks
Smile.

Answer 1

I'm not sure you can directly access a session bean from JSP.
Although I haven't tried this with sessionBean1, you might try using JSP's useBean tag.
    <jsp:useBean id=<localName> type=<classPath> scope=<scope> />localName is the name you want to use to refer to the bean. classPath is the fully qualified class path. scope is either page, request, session, or application.
I use this approach for accessing Java Beans. But before you can use the bean you have to add it as a session attribute. This makes it accessible to the page.
    FacesContext facesContext = FacesContext.getCurrentInstance();
    ExternalContext externalContext = facesContext.getExternalContext();
    HttpSession session = (HttpSession)externalContext.getSession(false);
    session.setAttribute(<attributeName>, <attributeValue>);You can then access the bean. I use scriptlets although you could also use JSP expressions or EL. I use scriptlets because I'm more comfortable with it.
<jsp:scriptlet>
    Address address = (Address)session.getAttribute("Address");
    if(address != null) {
        value = address.getAddress1();
        if(value != null) {
            out.println(value);
        value = address.getAddress2();
        if(value != null) {
            out.println(" " + value);
</jsp:scriptlet>I use this approach for accessing Java Beans. But before you can use it you have to add it as a session attribute.
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
HttpSession session = (HttpSession)externalContext.getSession(false);
session.setAttribute(<attributeName>, <attributeValue>);