Accessing variables in an object

Question

Is there any reason why JSTL should not be able to find a variable in a object using the . operator specially if i am view it in the servlet before passing it on to the JSP ?
exception
javax.servlet.ServletException: Unable to find a value for "userid" in object of class "auction.Customer" using operator "."
root cause
javax.servlet.jsp.el.ELException: Unable to find a value for "userid" in object of class "auction.Customer" using operator "."That is the error message given. I am absolutely sure there is a String variable called userid in the class auction.Customer

Answer 1

JSTL only accesses bean attributes via get/set methods.
ie to tell JSTL that the customer class has a String attribute called userid, you need the following method
public String getUserid(){
  return userid;
}If you also want to be able to change the value of userid, then you declare the setter as well
  public void setUserid(String userid){
    this.userid = userid;
  }Note that any property "property" is accessed using a "get" method of the form getProperty, which is made by capitalizing the first letter of the property name, and putting "get" on the front.
ie ${customer.userid} is equivalent to <%=customer.getUserid() %>
Hope this clears things up.
Cheers,
evnafets