编码方式注册及移除注册bean

SpringBeanRegisterUtil.java

package utils;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringBeanRegisterUtil {
	private static ApplicationContext context=new 
	ClassPathXmlApplicationContext("applicationContext.xml");
	private static ConfigurableApplicationContext configurableContext = 
	(ConfigurableApplicationContext) context;  
	private static BeanDefinitionRegistry beanDefinitionRegistry = 
   (DefaultListableBeanFactory) configurableContext.getBeanFactory();  
	
	/** register the bean */
	public static void registerBean(String beanId,String className) {
		// get the BeanDefinitionBuilder
		BeanDefinitionBuilder beanDefinitionBuilder = 
		BeanDefinitionBuilder.genericBeanDefinition(className);  
		// get the BeanDefinition
		BeanDefinition beanDefinition=beanDefinitionBuilder.getBeanDefinition();
		// register the bean
		beanDefinitionRegistry.registerBeanDefinition(beanId,beanDefinition);  
	}
	/** unregister the bean */
	public static void unregisterBean(String beanId){
		beanDefinitionRegistry.removeBeanDefinition(beanId);
	}
}