Merge branch 'main' of github.com:DerekYRC/mini-spring

changelog.md

@@ -280,10 +280,10 @@ public class XmlFileDefineBeanTest {
 }
 ```
 
-## [BeanFactoryPostProcess和BeanPostProcessor](#BeanFactoryPostProcess和BeanPostProcessor)
+## [BeanFactoryPostProcessor和BeanPostProcessor](#BeanFactoryPostProcessor和BeanPostProcessor)
 > 代码分支：bean-factory-post-processor-and-bean-post-processor
 
-BeanFactoryPostProcess和BeanPostProcessor是spring框架中具有重量级地位的两个接口，理解了这两个接口的作用，基本就理解spring的核心原理了。为了降低理解难度分两个小节实现。
+BeanFactoryPostProcessor和BeanPostProcessor是spring框架中具有重量级地位的两个接口，理解了这两个接口的作用，基本就理解spring的核心原理了。为了降低理解难度分两个小节实现。
 
 BeanFactoryPostProcessor是spring提供的容器扩展机制，允许我们在bean实例化之前修改bean的定义信息即BeanDefinition的信息。其重要的实现类有PropertyPlaceholderConfigurer和CustomEditorConfigurer，PropertyPlaceholderConfigurer的作用是用properties文件的配置值替换xml文件中的占位符，CustomEditorConfigurer的作用是实现类型转换。BeanFactoryPostProcessor的实现比较简单，看单元测试BeanFactoryPostProcessorAndBeanPostProcessorTest#testBeanFactoryPostProcessor追下代码。
 

pom.xml

@@ -62,5 +62,11 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>cglib</groupId>
+            <artifactId>cglib</artifactId>
+            <version>3.3.0</version>
+        </dependency>
+
     </dependencies>
 </project>

src/main/java/org/springframework/beans/factory/support/CglibSubclassingInstantiationStrategy.java

@@ -1,5 +1,7 @@
 package org.springframework.beans.factory.support;
 
+import net.sf.cglib.proxy.Enhancer;
+import net.sf.cglib.proxy.MethodInterceptor;
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.config.BeanDefinition;
 
@@ -18,7 +20,9 @@ public class CglibSubclassingInstantiationStrategy implements InstantiationStrat
 	 */
 	@Override
 	public Object instantiate(BeanDefinition beanDefinition) throws BeansException {
-		//TODO 感兴趣的小伙伴可以实现下
-		throw new UnsupportedOperationException("CGLIB instantiation strategy is not supported");
+		Enhancer enhancer = new Enhancer();
+		enhancer.setSuperclass(beanDefinition.getBeanClass());
+		enhancer.setCallback((MethodInterceptor) (obj, method, argsTemp, proxy) -> proxy.invokeSuper(obj,argsTemp));
+		return enhancer.create();
 	}
 }

src/test/java/org/springframework/test/ioc/HelloService.java

@@ -0,0 +1,13 @@
+package org.springframework.test.ioc;
+
+/**
+ * @author derekyi
+ * @date 2020/11/22
+ */
+public class HelloService {
+
+	public String sayHello() {
+		System.out.println("hello");
+		return "hello";
+	}
+}