Java 尚未使用ApplicationContextAware刷新AnnotationConfigApplicationContext

我在非Spring框架中使用Springbeans，为此我实现了ApplicationContextAware来访问Springbeans

@Service
public class ApplicationContextProviderService implements ApplicationContextAware {
    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        ApplicationContextProviderService.applicationContext = applicationContext;
    }

    public static <T> T getBean(Class<T> beanType) {
        System.out.println("bean out: " + applicationContext);
        return applicationContext.getBean(beanType);
    }

}

我得到以下错误：

java.lang.IllegalStateException:
**org.springframework.context.annotation.AnnotationConfigApplicationContext@7f485fda has not been refreshed yet     at
** org.springframework.context.support.AbstractApplicationContext.assertBeanFactoryActive(AbstractApplicationContext.java:1072) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]   at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1102) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]   at com.example.app.service.ApplicationContextProviderService.getBean(ApplicationContextProviderService.java:19) ~[classes/:na]  at com.example.app.CustomFilter.<init>(CustomFilter.java:26) ~[classes/:na]

java.lang.IllegalStateException:
**org.springframework.context.annotation。AnnotationConfigApplicationContext@7f485fda尚未在刷新
**org.springframework.context.support.AbstractApplicationContext.assertBeanFactoryActive（AbstractApplicationContext.java:1072）~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]位于org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplicationContext.java:1102）~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]在com.example.app.service.ApplicationContextProviderService.getBean（ApplicationContextProviderService.java:19）~[classes/:na]在com.example.app.CustomFilter.（CustomFilter.java:26）~[classes/:na]

---

如何解决这个问题？

我认为您在未初始化上下文时获得了bean

因此，请确保您正在调用这段代码：

this.connectionStateService = ApplicationContextProviderService.getBean(ConnectionStateService.class);

---

初始化上下文后

在应用程序运行之前，当应用程序尝试调用ApplicationContext时，问题与此相关，因此您将无法拥有应用程序上下文，因为它未创建。解决方案是为ConnectionStateService类创建一个单例，这样您就不需要创建调用ApplicationContext的服务

public class ConnectionStateService { 

// static variable instance of type Singleton 
private static ConnectionStateService single_instance = null; 

// private constructor restricted to this class itself 
private ConnectionStateService() { 
 // some stuffs for initialize here
}  

// static method to create instance of Singleton class 
public static ConnectionStateService getInstance()  { 
if (instance == null) 
     instance = new ConnectionStateService(); 
     return instance; 
} 

---

}

ApplicationContext对象没有刷新方法。该bean在从spring上下文调用时返回，但在从非spring类调用时不起作用。AnnotationConfigApplicationContext具有该bean，并且您遇到异常。我的目的是上下文没有初始化Yet当我这样做的时候，我得到一个错误，上下文只能刷新一次。当你从非bean类调用你的方法时？服务注释是从@Component继承的。你说最好在之前使用注入它，那么它应该更改什么？是的，我想，我之前做过一个测试，我注意到这是第一个被注入的组件被引用，就像Bean一样。我认为您的问题在于您调用上下文的方法。你能添加这个方法吗？Mykhailo已经开始聊天，我在那里发布了一些详细信息：我的第一篇文章给出了主要的详细信息。这个问题主要是因为应用程序上下文没有初始化。虽然原因我不知道，但那就是原因。

public class ConnectionStateService { 

// static variable instance of type Singleton 
private static ConnectionStateService single_instance = null; 

// private constructor restricted to this class itself 
private ConnectionStateService() { 
 // some stuffs for initialize here
}  

// static method to create instance of Singleton class 
public static ConnectionStateService getInstance()  { 
if (instance == null) 
     instance = new ConnectionStateService(); 
     return instance; 
}