XmlBeanFactory类解读
XmlBeanFactory介绍
XmlBeanFactory继承于DefaultListableBeanFactory，拥有BeanFactory默认的所有功能。
XmlBeanFactory只是在DefaultListableBeanFactory的基础上添加了一个XmlBeanDefinitionReader（用以专门读取XML文件中的bean），所有XmlBeanFactory是一个专门读取xml文件中的bean而创建出来的BeanFactory。
并且XmlBeanFactory属于老旧的BeanFactory，已经被弃用。
XmlBeanFactory源码
@Deprecated
@SuppressWarnings({"serial", "all"})
public class XmlBeanFactory extends DefaultListableBeanFactory {
private final XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(this);
/**
* 通过XmlBeanDefinitionReader加载XML资源文件
*/
public XmlBeanFactory(Resource resource) throws BeansException {
this(resource, null);
}
/**
* 通过XmlBeanDefinitionReader加载XML资源文件
*/
public XmlBeanFactory(Resource resource, BeanFactory parentBeanFactory) throws BeansException {
super(parentBeanFactory);
this.reader.loadBeanDefinitions(resource);
}
}
XmlBeanFactory例子
@SpringBootTest
public class TestXmlFactory {
@Test
public void testXmlFactory(){
XmlBeanFactory xmlBeanFactory = new XmlBeanFactory(new ClassPathResource("application.xml"));
TestBean testBean = (TestBean)xmlBeanFactory.getBean("testBean");
//TestBean的toString被我重写过
System.out.println(testBean);
}
}
结果展示
15:58:13.435 [main] DEBUG org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loaded 1 bean definitions from class path resource [application.xml]
15:58:13.439 [main] DEBUG org.springframework.beans.factory.xml.XmlBeanFactory - Creating shared instance of singleton bean 'testBean'
这是测试bean
例子结果分析
15:58:13.435 [main] DEBUG org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loaded 1 bean definitions from class path resource [application.xml]
说明了bean definitions是通过XmlBeanDefinitionReader读取的
15:58:13.439 [main] DEBUG org.springframework.beans.factory.xml.XmlBeanFactory - Creating shared instance of singleton bean ‘testBean’
说明了bean是由XmlBeanFactory创建的
