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Doubt in <useBean > Standard action  RSS feed

 
Greenhorn
Posts: 23
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The below is a Product bean class

package com.certkiller

public class Product {

private String name;
private double price;

public Product(){
this(“Default”,0.0)
}
//Setter and Getter methods
}

A session-scoped attribute, product, is stored by a servlet. That servlet then forwards to a JSP page. This attribute holds an instance of com.Certkiller.Product class with a name property of “The Matrix” and price property of 39.95.
Given the JSP page code snippet:

<jsp: useBean id = ‘product’ class = ‘com.Certikiller.Product’>
<jsp: setProperty name = ‘product’ property = ‘price’ value = ’49.95’/>
</jsp: Bean>

<%=product.getName()%>
Costs <%= product.getPrice() %>

What is the response output of this JSP page code snippet?

Ans. Given answer is : Default costs 49.95

But I think the answer should be: The Matrix costs 49.95

can anyone correct me
 
Ranch Hand
Posts: 5575
Eclipse IDE Java Windows XP
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the default useBean scope is page not a session right? aslo you did not paste javabean class argument constructor
 
Salim Khatib
Greenhorn
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Thanks for your reply

is that not true that useBean standard action first searches the "product" in all the scopes, and if it does not find it
then will create the the instance of product if the scope is not specified ?
 
Seetharaman Venkatasamy
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Salim Khatib wrote:
is that not true that useBean standard action first searches the "product" in all the scopes, and if it does not find it
then will create the the instance of product if the scope is not specified



No, if scope is not specified , by default scope is page .
 
Salim Khatib
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Given that

A servlet context listener load a list of com.example.Product objects from a database and stores that list into the catalog attribute of the ServletContext object.

Construct a jsp:useBean standard action to access this catalog.

The given answer is answer <jsp:useBean name = ‘catalog’ id = ‘catalog’ type = ‘com.example.Product’>

But I feel its wrong .. as there is no name attribute for jsp:useBean

Please correct if I am worng
 
Seetharaman Venkatasamy
Ranch Hand
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Eclipse IDE Java Windows XP
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Salim Khatib wrote:
But I feel its wrong .. as there is no name attribute for jsp:useBean


yes you are correct. you will get compile time error
 
It is sorta covered in the JavaRanch Style Guide.
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