目录

• 1、BeanDefinition
• 2、beanFactory
• 3、BeanDefinitionReader
• 4、ClassPathBeanDefinitionScanner
• 5、ConditionEvaluator
• 6、Aware

//定义一个BeanDefinitionAbstractBeanDefinition beanDefinition = BeanDefinitionBuilder.genericBeanDefinition().getBeanDefinition();//设置当前bean的class 1、通过class获取 2、通过类的全限定类名获取//beanDefinition.setBeanClass(Testt.class);beanDefinition.setBeanClassName("com.beans.Testt");//将beanDefinition注册到BeanFactory中DefaultListableBeanFactory factory = new DefaultListableBeanFactory();factory.registerBeanDefinition("BEAN",beanDefinition);//获取Beanfactory.getBean("BEAN");

//生成BeanDefinitionRootBeanDefinition rootBeanDefinition = new RootBeanDefinition(Testt.class);DefaultListableBeanFactory factory = new DefaultListableBeanFactory();//将BeanDefinition注册到工厂中factory.registerBeanDefinition("tt",rootBeanDefinition);Object tt = factory.getBean("tt");System.out.println(tt);

public class Testt {    public String name;    public void sayHello(){        System.out.println("Hello World!");    }    public void setName(String name){        this.name = name;    }    public String getName(){        return name;    }}

//生成一个BeanDefinitionRootBeanDefinition rootBeanDefinition = new RootBeanDefinition(Testt.class);//赋值属性name为123rootBeanDefinition.getPropertyValues().addPropertyValue("name","123");//获取name的值Object name = rootBeanDefinition.getPropertyValues().getPropertyValue("name").getValue();DefaultListableBeanFactory factory = new DefaultListableBeanFactory();factory.registerBeanDefinition("tt",rootBeanDefinition);Testt tt = (Testt) factory.getBean("tt");System.out.println(tt);//通过实例获取name的值String name1 = tt.getName();System.out.println(name1); //123System.out.println(name);//123

beanDefinition.setScope("prototype"); // 设置作用域beanDefinition.setInitMethodName("init"); // 设置初始化方法beanDefinition.setAutowireMode(0); // 设置自动装配模型 0默认装配模式不自动注入，1 ByName 2 ByType 3 构造器注入 ......

private final Map<String, RootBeanDefinition> mergedBeanDefinitions = new ConcurrentHashMap<>(256);

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.springframework.org/schema/beans                                                     http://www.springframework.org/schema/beans/spring-beans.xsd">       <bean id="parent" scope="prototype"/>       <bean id="children" parent="parent"/></beans>

public class mainT {    public static void main(String[] args) {        ClassPathXmlApplicationContext classPathXmlApplicationContext =                                                        new ClassPathXmlApplicationContext("Spring.xml");        classPathXmlApplicationContext.getBean("children");    }}

public void setParentName(@Nullable String parentName) {        this.parentName = parentName;    }

@Override    public String getParentName() {        return null;    }    @Override    public void setParentName(@Nullable String parentName) {        if (parentName != null) {            throw new IllegalArgumentException("Root bean cannot be changed into a child bean with parent reference");        }    }

AbstractBeanDefinition beanDefinition = BeanDefinitionBuilder.genericBeanDefinition().getBeanDefinition();beanDefinition.setBeanClass(Testt.class);DefaultListableBeanFactory factory = new DefaultListableBeanFactory();//注册BeanDefinitionfactory.registerBeanDefinition("Testt",beanDefinition);//注册别名factory.registerAlias("Testt","T");//获取beanObject alias = factory.getBean("T");System.out.println(alias);//com.beans.Testt@6b1274d2//通过类型获取BeanString[] beanNamesForType = factory.getBeanNamesForType(Testt.class);System.out.println(beanNamesForType[0]);//Testt//获取BeanDefinitionBeanDefinition testt = factory.getBeanDefinition("Testt");System.out.println(testt);//Generic bean: class [com.beans.Testt]; scope=; abstract=false; lazyInit=null; autowireMode=0; //dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; //initMethodName=null; destroyMethodName=null//获取BeanDefinition个数int beanDefinitionCount = factory.getBeanDefinitionCount();System.out.println(beanDefinitionCount);//获取Bean的提供者ObjectProvider<Testt> beanProvider = factory.getBeanProvider(Testt.class);    System.out.println(beanProvider);//org.springframework.beans.factory.support.DefaultListableBeanFactory$1@6a472554

private final DefaultListableBeanFactory beanFactory;

DefaultListableBeanFactory factory = new DefaultListableBeanFactory();AnnotatedBeanDefinitionReader Reader = new AnnotatedBeanDefinitionReader(factory);/*** 也可以使用registerBean(Testt.class) 或者 registerBean(Testt.class,"指定Bean名字")**/Reader.register(Testt.class);Object testt = factory.getBean("testt");System.out.println(testt);

DefaultListableBeanFactory factory = new DefaultListableBeanFactory();ClassPathBeanDefinitionScanner classPathBeanDefinitionScanner = new ClassPathBeanDefinitionScanner(factory);//得到该包下类的个数//        int scan = classPathBeanDefinitionScanner.scan("com.beans");//        System.out.println(scan);//6//扫描没有加@Componment注解的类，并注册到容器中，未通过注解或其他方式定义Bean的类也不会添加到容器中//classPathBeanDefinitionScanner.addExcludeFilter(new AnnotationTypeFilter(Component.class));//扫描加了@Componment注解的类，并注册到容器中classPathBeanDefinitionScanner.addIncludeFilter(new AnnotationTypeFilter(Component.class));//获取beanObject bean = factory.getBean(BeanTest.class);System.out.println(bean);//com.beans.BeanTest@5ccddd20

@Componentpublic class User implements BeanNameAware {    private String awareName;    @Override    public void setBeanName(String name) {        this.awareName = name;    }    public String getAwareName(){        return awareName;    }}

@ComponentScan("com.beans")public class mainT {    public static void main(String[] args) {        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(mainT.class);        User bean = context.getBean(User.class);        System.out.println(bean.getAwareName());    }}