spring – @ManagedBean @Component类中的@Autowired服务在JSF

参见英文答案 > Spring JSF integration: how to inject a Spring component/service in JSF managed bean?????????????????????????????????????3个
我尝试使用JSF 2进行联合Spring 3(MVC).我在Spring和JSF中有一些经验,但之前从未尝试过加入它们.最后我有2个文件

@ManagedBean(name = "userBean")
@Scope
@Component
public class someBean {

  @Autowired
  private TestService testService;

  public void printString() {
    System.out.println(testService.getString());
  }
}

和

@ManagedBean(name = "studentBean")
@Scope
@Component
public class StudentBean {

  @Autowired
  private TestService testService;

  public void printString() {
    System.out.println(testService.getString());
  }
}

对于这些文件,我有正确的spring,jsf和web.xml配置.并有.xhtml页面,我为’someBean’和’StudentBean’启动printString().我在第一种情况下使用NPE,在第二种情况下在控制台中使用“some string”.
原因很简单 – Spring上下文和JSF中的bean名称不同.所有问题都完成了

@Component => @Component("userBean") 
public class someBean {

在调试中我看到了

private TestService testService;

@Autowired
public void setTestService(TestService testservice) {
  this.testService = testService;
}

当JSF bean创建的testService集不为null时,但在JSF生命周期中它为null时

public void pringString() {
  testService.blah();
}

testService为null.这是我无法理解的.有谁深入了解Spring和JSF详细描述这种情况？