Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.1k views
in Technique[技术] by (71.8m points)

jsf 2 - Whats the correct way to create multiple instances of managed beans in JSF 2.0

If I want to create more than one instance of managed bean in JSF 2.0, under different names in the same scope, how should I proceed? Ideally, I want the equivilant to (for example):

@ManagedBeans({name="myManagedBean1",name="myManagedBean2"})
@RequestScoped
public class MyManagedBean {

}

Thanks ..

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

You can't. It technically also doesn't make much sense. You're probably looking for a solution in the wrong direction for the particular functional requirement.

Your best bet is to have a parent bean and have those "multiple beans" as children.

@ManagedBean
@RequestScoped
public class Parent {
    private Child child1;
    private Child child2;
    // ...
}

so that you can access it by #{parent.child1} and #{parent.child2}. You can of course also use a List<Child> property or even Map<String, Child> instead to be more flexible.

With the faces-config.xml it's however possible to define multiple bean classes with a different name. Still then, I don't see how that's useful.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...