@ManagedProperty in a Spring managed bean is null

Question

I\'ve some trouble with injecting one managedbean in another by defining a managedproperty. I\'m googling and stackoverflowing now for 3 days, but with no result...

Answer 1

Your JSF backing beans (MainBean and UserBean) should be managed either by JSF or by Spring, but not by both of them.

If your beans are managed by JSF:

• You annotate them with @ManagedBean and @...Scoped
• You don't need to declare them in applicationContext.xml

• You use @ManagedProperty instead of @Autowired, even if you need to inject beans managed by Spring (don't forget setters, @ManagedProperty requires it):

  @ManagedProperty("#{userDao}")
  private UserDao userDao;
  

If your beans are managed by Spring:

• You declare them in applicationContext.xml with appropriate scopes (view scope is not supported)
• You don't need @ManagedBean and @...Scoped
• You use @Autowired instead of @ManagedProperty and you cannot inject beans managed by JSF this way

In both cases you need to configure Spring-JSF bridge in faces-context.xml:

<application>
    <el-resolver>
        org.springframework.web.jsf.el.SpringBeanFacesELResolver
    </el-resolver>
</application>