Click the Exhibit button. 
Given the HTML form:
1. <html>
2. <body>
3. <form action=”submit.jsp”>
4. Name: <input type=”text” name=”i1″><br>
5. Price: <input type=”text” name=”i2″><br>
6. <input type=”submit”>
7. </form>
8. </body>
9. </html>
Assume the product attribute does NOT yet exist in any scope.
Which code snippet, in submit.jsp, instantiates an instance of com.example.Product that contains
the results of the form submission?
A.
<jsp:useBean id=”com.example.Product” />
<jsp:setProperty name=”product” property=”*” />
B.
<jsp:useBean id=”product” class=”com.example.Product” />
${product.name = param.i1}
${product.price = param.i2}
C.
<jsp:useBean id=”product” class=”com.example.Product”>
<jsp:setProperty name=”product” property=”name”
param=”i1″ />
<jsp:setProperty name=”product” property=”price”
param=”i2″ />
</jsp:useBean>
D.
<jsp:useBean id=”product” type=”com.example.Product”>
<jsp:setProperty name=”product” property=”name”
value=”<%= request.getParameter( “i1″ ) %>” />
<jsp:setProperty name=”product” property=”price”
value=”<%= request.getParameter( “i2″ ) %>” />
</jsp:useBean>
C
C indeed
C is correct but Why is D wrong. Its not the recommended way but still it is not incorrect.
type:It is mainly used with class or beanName attribute. If you use it without class or beanName, no bean is instantiated.
class: instantiates the specified bean class (i.e. creates an object of the bean class) but it must have no-arg or no constructor and must not be abstract.