如何通过@ManagedProperty 注释注入整个托管 bean?

问题描述

我试图通过 @ManagedProperty 注释(非常类似于 是否可以将@ManagedBean 作为@ManagedProperty 注入@WebServlet?，但我注入的是bean，而不是servlet).这就是我正在做的:

I'm trying to inject entire JSF managed bean into another managed bean by means of @ManagedProperty annotation (very similar to Possible to inject @ManagedBean as a @ManagedProperty into @WebServlet?, but I'm injecting into a bean, not a servlet). This is what I'm doing:

@ManagedBean
public class Foo {
  @ManagedProperty(value = "#{bar}")
  private Bar bar;
}

@ManagedBean
public class Bar {
}

不起作用(JSF 2.0/Mojarra 2.0.3):

Doesn't work (JSF 2.0/Mojarra 2.0.3):

SEVERE: JSF will be unable to create managed bean foo when it is
requested.  The following problems where found:
- Property bar for managed bean foo does not exist. Check that
  appropriate getter and/or setter methods exist.

是否有可能，或者我需要通过 FacesContext 以编程方式进行注入?

Is it possible at all or I need to do this injection programmatically via FacesContext?

推荐答案

需要添加setter和getter

You need to add setters and getters

@ManagedBean
public class Foo {
  @ManagedProperty(value = "#{bar}")
  private Bar bar;
  //add setters and getters for bar
  public Bar getBar(){
      return this.bar;
  }
  public void setBar(Bar bar){
      this.bar = bar;;
  }
}

当 FacesContext 将解析并注入依赖项时，它将使用 setter 注入，因此应该存在适当的 setter/getter.否则它将找不到属性

When the FacesContext will resolve and inject dependencies it will use setters injection so appropriate setters/getters should be there.otherwise it won't find the property

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