【企业应用--spring】在任何地方调用spring配置的bean

需求：在一个类A里调用spring配置的bean,但类A没有配置到sping中。

 

解决方法：

1、创建“ApplicationContextProvider”类，代码如下：

 

package context;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/** This class provides an application-wide access to the  
 * Spring ApplicationContext! The ApplicationContext is  
 * injected in a static method of the class "AppContext".  
 * Use AppContext.getApplicationContext() to get access  
 * to all Spring Beans.  
 */
public class ApplicationContextProvider implements ApplicationContextAware {
	public void setApplicationContext(ApplicationContext ctx) throws BeansException {
		AppContext.setApplicationContext(ctx);

	}
}

 

 2、创建“AppContext”类，代码如下：

 

import org.springframework.context.ApplicationContext;

/** This class provides application-wide access to the Spring ApplicationContext. 
 * The ApplicationContext is injected by the class "ApplicationContextProvider".  
 * */
public class AppContext {
	private static ApplicationContext ctx;

	/** Injected from the class "ApplicationContextProvider" which is automatically 
	 *  loaded during Spring-Initialization.      */
	public static void setApplicationContext(ApplicationContext applicationContext) {
		ctx = applicationContext;
	}

	/** Get access to the Spring ApplicationContext from everywhere in your Application.      
	 *  @return     
	 **/
	public static ApplicationContext getApplicationContext() {
		return ctx;
	}
} // .EOF  

 

 3、修改applicationContext.xml，增加如下配置

 

<bean id="contextApplicationContextProvider" class="context.ApplicationContextProvider"></bean>

 

 4、此时就可以在任意地方调用spring中配置的bean.调用方法如下：

 

ApplicationContext ctx = AppContext.getApplicationContext();   
//honey 为配置到spring中的bean的id
Honeypotbean honey = (HoneyPotBean) ctx.getBean("honey");  

 

 

评论

2 楼 wellbbs 2011-04-17  

后来改了只能调用
@Transactional
里的方法就没有问题了

1 楼 wellbbs 2011-04-17  

现在是可以取到了，我写的这个单例里可以使用spring里注册的bean，
但是这个单例在jsp页面使用时候报
No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
错误