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VARNAME=”prefs” If not given, the variable name of the bean is set to the value of its name attribute. TYPE Specifies the name of the bean’s class or interface type. For example: TYPE=”UserPreferencesBean” The type defaults to java.lang.Object. INTROSPECT Specifies if the server should set the bean’s properties using the parameter values in the client’s request. Its value must be “yes” or “no”. The default is “yes”. BEANNAME Specifies the serialized file or class file that contains the bean, used when first creating the bean. This is an optional attribute. For example: BEANNAME=”hellobean.ser” CREATE Specifies if the bean should be created if it doesn’t already exist. Its value must be “yes” or “no”. The default is “yes”. If createis set to “no” and a preexisting instance isn’t found, an error is returned to the client. SCOPE Specifies if the bean should be assigned to a specific request (where it is used once and destroyed or recycled) or to a client session (where it’s automatically made available every time the same client reconnects, within a certain time frame). Its value must be “request” or “session”. The default is “request”. Parameters can be passed to a bean as a list using a tags placed between the opening tag and the closing tag. The parameter values are used to set the bean’s properties using introspection. Example 2-11 demonstrates the use of a JavaBeans component with a JSP page; it says Hello with the help of a HelloBean. Example 2-11. Saying Hello using a JavaBean
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This entry was posted on Monday, January 22nd, 2007 at 7:12 pm and is filed under servlet. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.