<jsp:getProperty>

Gets the value of a bean property so that you can display it in a result page.

Syntax

<jsp:getProperty name="beanInstanceName"  property="propertyName" />

Examples

<jsp:useBean id="calendar" scope="page" class="employee.Calendar" />

<h2>

Calendar of <jsp:getProperty name="calendar" property="username" /> 

</h2>

Description

The <jsp:getProperty> element gets a bean property value using the property's getter methods and displays the property value in a JSP page. You must create or locate a bean with <jsp:useBean> before you use <jsp:getProperty>.

The <jsp:getProperty> element has a few limitations you should be aware of:

• You cannot use <jsp:getProperty> to retrieve the values of an indexed property.
• You can use <jsp:getProperty> with JavaBeans components, but not with enterprise beans. As alternatives, you can write a JSP page that retrieves values from a bean that in turn retrieves values from an enterprise bean, or you can write a custom tag that retrieves values from an enterprise bean directly.

Attributes

• name="beanInstanceName"

  The name of an object (usually an instance of a bean) as declared in a <jsp:useBean> element.

• property="propertyName"

  The name of the bean property whose value you want to display. The property is declared as a variable in a bean and must have a corresponding getter method (for more information on declaring variables and writing getter methods in beans, see http://java.sun.com/products/javabeans/docs/).

Tips

• In the Tomcat implementation, if you use <jsp:getProperty> to retrieve a property value that is null, a NullPointerException is thrown. However, if you use a scriptlet or expression to retrieve the value, the string null is displayed in the browser; see Scriptlet or Expression for more information.

See Also

• <jsp:useBean>
• <jsp:setProperty>