<jsp:getProperty>
Inserts the value of a bean property into the result.
JSP Syntax and XML 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 inserts the value into the response. 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:getPropertyto retrieve the values of an indexed property. - You can use
jsp:getPropertywith 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.
- 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/javase/technologies/desktop/javabeans/docs/).
- 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/javase/technologies/desktop/javabeans/docs/).
Tip
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.