difference between bean and backing bean?

[ryo gin]

Hi to all,

I am a beginner of JSF.

Can anayone help me explane the difference between bean and backing bean.

If its ok for you, please give me a sample code so that I can identify the difference.

Thanks in advance,
*kato_ryo*

[Jason Porter]

Little bit hard just off of that, but my guess would be a bean would be a Java Bean aka POJO. A Backing Bean would be a JSF managed bean (specified via annotations in JSF 2.0 or in faces-config.xml)

[Tim Holloway]

A backing bean is a bean that backs JSF Views. In other words, any bean that's directly referenced on a JSF view definition.

In order to make sure that the backing bean is actually going to exist when the view is realized, it has to be a managed bean, so that the system will know what kind of bean to construct and what symbol name to reference it by.

For the most part, managed beans and backing beans are one and the same. But they're all POJO's at heart, just constructed by the JSF framework instead of some other mechanism.

[Ed Burns]

This is the blog entry for you, by my co-author Neil Griffin

http://blog.icefaces.org/blojsom/blog/default/2009/04/23/Making-distinctions-between-different-kinds-of-JSF-managed-beans/

Ed