JavaServer Pages, Second Edition

Name

<jsp:useBean>

Synopsis

The <jsp:useBean> action associates a Java bean with a name in one of the JSP scopes and also makes it available as a scripting variable. An attempt is first made to find a bean with the specified name in the specified scope. If it’s not found, a new instance of the specified class is created.

Syntax 1: Using a concrete class, no body

<jsp:useBean id="beanVariableName" class="className"
  [scope="page|request|session|application"] />

Syntax 2: Using a concrete class, with a body

<jsp:useBean id="beanVariableName" class="className"
  [scope="page|request|session|application"]>
  Evaluated if a new instance is created
</jsp:useBean>

Syntax 3: Using a type and optionally a class or a serialized bean, no body

<jsp:useBean id="beanVariableName" type="className" 
  [class="className" | beanName="className"]
 [ scope="page|request|session|application"] />

Syntax 4: Using a type and optionally a class or a serialized bean, with a body

<jsp:useBean id="beanVariableName" type="className" 
  [class="className" | beanName="className"]
  [scope="page|request|session|application"]>
  Evaluated if a new instance is created
</jsp:useBean>

Attributes

Attribute name	Java type	Dynamic value accepted	Description
beanName	String	RT expression	The name of the bean, as expected by the instantiate( ) method of the Beans. class in the java.beans package
class	String	No	The fully qualified class name for the bean
id	String	No	The name to assign to the bean in the specified scope, as well ...