HierarchicalBeanFactory

深碍√TFBOYSˉ_ 2023-08-17 16:04 71阅读 0赞

BeanFactory分层

package org.springframework.beans.factory;
     //分层工厂
    public interface HierarchicalBeanFactory extends BeanFactory { 
    
         //返回工厂的父工厂
        BeanFactory getParentBeanFactory();
    
         //这个工厂中是否包含这个Bean
        boolean containsLocalBean(String name);
    }

测试代码

@Test
        public void testAutowireWithParent() throws Exception { 
            DefaultListableBeanFactory xbf = new DefaultListableBeanFactory();
            new XmlBeanDefinitionReader(xbf).loadBeanDefinitions(AUTOWIRE_CONTEXT);
            DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
            MutablePropertyValues pvs = new MutablePropertyValues();
            pvs.add("name", "kerry");
            RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);
            bd.setPropertyValues(pvs);
            lbf.registerBeanDefinition("spouse", bd);
            xbf.setParentBeanFactory(lbf);
            doTestAutowire(xbf);
        }
    
        private void doTestAutowire(DefaultListableBeanFactory xbf) throws Exception { 
            DependenciesBean rod1 = (DependenciesBean) xbf.getBean("rod1");
            TestBean kerry = (TestBean) xbf.getBean("spouse");
            // should have been autowired
            assertEquals(kerry, rod1.getSpouse());
        }

调用了setParentBeanFactory设置BeanFactory,lbf中注册了spouse,所以在调用getBean时可以获取到spouse