动态Bean的实现类
import java.io.IOException; import org.springframework.beans.BeansException; import org.springframework.beans.factory.support.BeanDefinitionRegistry; import org.springframework.beans.factory.xml.ResourceEntityResolver; import org.springframework.beans.factory.xml.XmlBeanDefinitionReader; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.context.ConfigurableApplicationContext; /** * * This class used to dynamic loan bean to spring context during runtime * * */ public class DynamicLoadBean implements ApplicationContextAware{ private ConfigurableApplicationContext applicationContext = null; public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { this.applicationContext = (ConfigurableApplicationContext)applicationContext; } public ConfigurableApplicationContext getApplicationContext() { return applicationContext; } /** * 向spring的beanFactory动态地装载bean * @param configLocationString 要装载的bean所在的xml配置文件位置。 spring配置中的contextConfigLocation，同样支持诸如"/WEB-INF/ApplicationContext-*.xml"的写法。 */ public void loadBean(String configLocationString){ XmlBeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader((BeanDefinitionRegistry)getApplicationContext().getBeanFactory()); beanDefinitionReader.setResourceLoader(getApplicationContext()); beanDefinitionReader.setEntityResolver(new ResourceEntityResolver(getApplicationContext())); try { String[] configLocations = new String[]{configLocationString}; for(int i=0;i<configLocations.length;i++) beanDefinitionReader.loadBeanDefinitions(getApplicationContext().getResources(configLocations[i])); } catch (BeansException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
测试类如下
ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:data-access-config.xml"); DynamicLoadBean dynamicBeanLoad =(DynamicLoadBean)ctx.getBean("dynamicLoadBean"); dynamicBeanLoad.loadBean("data-access-dynamicConfig.xml"); MagazineService magezineService = (MagazineService)ctx.getBean("magazineService");
data-access-config.xml文件中包含原始的bean, data-access-dynamicConfig.xml文件中包含要动态加载的bean的配置文件。
不要忘了把DyanmicLoanBean 配置到原始的spring context 配置文件中也就时data-access-config.xml中
<bean id="dynamicLoadBean" class="com.spring.dynamic.DynamicLoadBean"> </bean>
动态加载的bean的配置文件
<bean id="magazineService" class="com.ibank.test.openjpa.dao.MagazineServiceImpl"> <property name="magazineDao" ref="magazineDao"/> </bean>
当然了动态加载的bean也可以reference 到原始的context中的bean.比如magazineDao就是在data-access-config.xml中配置的一个bean.
http://elicer.iteye.com/blog/438026
