@ManagedProperty in a Spring managed bean is null

spring jsf null managed-property

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>

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