Java ApplicationContext beanfactory org.springframework.beans.factory.noSuchBean定义异常：

我的代码如上所示。 我用两种方式调用getBean，第一种方式运行perfact，但第二种方式抛出如下异常

org.springframework.beans.factory.noSuchBean定义异常：未定义名为“UserAccountServiceImpl”的bean

applictionContext是从

实现ApplicationContextAware

SpringContextListener如下所示：

 UserAccountServiceImpl service = applicationContext.getBean("UserAccountServiceImpl", UserAccountServiceImpl.class);
 service =SpringContextListener.getBean("UserAccountServiceImpl", UserAccountServiceImpl.class);

---

公共最终类SpringContextListener实现BeanFactoryAware{
私人静态Bean工厂Bean工厂；
公共静态BeanFactory getBeanFactory（）{
还豆厂；
}
公共工厂（BeanFactory BeanFactory）{
if（SpringContextListener.beanFactory！=null）{
抛出新的运行时异常（“beanFactory初始化………”；
}
SpringContextListener.beanFactory=beanFactory；
}
公共静态T getBean（字符串beanName，类clazs）{
return clazs.cast（beanFactory.getBean（beanName））；
}  
}

---

applicationContext和beanfactory之间有什么区别？我的代码有什么问题？

我在application-context.xml中添加了

useraccountserviceinpl

作为bean

public final class SpringContextListener implements BeanFactoryAware {

    private static BeanFactory beanFactory;

    public static BeanFactory getBeanFactory() {
        return beanFactory;
    }

    public void setBeanFactory(BeanFactory beanFactory) {
        if(SpringContextListener.beanFactory != null) {
            throw new RuntimeException("beanFactory inited .............");
        }
        SpringContextListener.beanFactory = beanFactory;
    }

    public static <T> T getBean(String beanName, Class<T> clazs) {  
        return clazs.cast(beanFactory.getBean(beanName));  
    }  
}

结果:

ApplicationContext applicationContext =
    newClassPathXmlApplicationContext("application-context.xml");

UserAccountServiceImpl service = applicationContext.getBean("UserAccountServiceImpl",
    UserAccountServiceImpl.class);

System.out.println(service);

service=SpringContextListener.getBean("UserAccountServiceImpl",UserAccountServImpl.class);

System.out.println(service);

---

您的代码不完整。您没有在任何地方调用

SpringContextListener.setBeanFactory

。如果没有这一点，这个问题就没有意义了。您已经在应用程序上下文中定义了

useraccountserviceinpl

bean了吗？或者应该是

UserAccountService

？添加到application-context.xml中，如下所示：谢谢！你的回答对解决我的问题是正确的。但不是我想要的确切结果。最后，我知道了原因。此标记应在UserAccountServiceImpl获取beanfactory之前添加！

ApplicationContext applicationContext =
    newClassPathXmlApplicationContext("application-context.xml");

UserAccountServiceImpl service = applicationContext.getBean("UserAccountServiceImpl",
    UserAccountServiceImpl.class);

System.out.println(service);

service=SpringContextListener.getBean("UserAccountServiceImpl",UserAccountServImpl.class);

System.out.println(service);

UserAccountServiceImpl [toString()=com.vl.test.UserAccountServiceImpl@3834d63f]
UserAccountServiceImpl [toString()=com.vl.test.UserAccountServiceImpl@3834d63f]