JSP syntax (9)

<Jsp: getProperty>

Obtains the Bean property value, which is displayed on the page.

JSP syntax

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

Example

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

<H2>

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

</H2>

Description

The <jsp: getProperty> element obtains the Bean property value and can be used or displayed on the JSP page. before using <jsp: getProperty>, you must use <jsp: useBean> to create it.

<Jsp: getProperty> elements have some restrictions:

You cannot use <jsp: getProperty> to retrieve an indexed property.

You can use <jsp: getProperty> with the JavaBeans component, but not with the Enterprise

Bean.

Attribute

Name = "beanInstanceName"
Bean name, specified by <jsp: useBean>

Property = "propertyName"
Attribute name of the specified Bean.

TIPS:

As mentioned in sun's JSP reference, if you use <jsp: getProperty> to retrieve a value that is null, NullPointerException will occur. If you use a program segment or expression to retrieve the value, in the browser, null is displayed ).