🗑️ 🧱 🩺 🗃️ 🎉 🥚 👔 ⚰️

Author: shuxuecode

springboot3.0/springboot335/src/main/java/com/springboot335/springboot335/config/MyBeanFactoryPostProcessor.java

@@ -0,0 +1,34 @@
+package com.springboot335.springboot335.config;
+
+import org.springframework.beans.MutablePropertyValues;
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.context.annotation.Configuration;
+
+
+/**
+ * // 通过实现 BeanFactoryPostProcessor 接口，
+ * // 可以在 Bean 实例化前修改其配置信息，适用于全局调整 Bean 的元数据，如更改属性值或替换占位符。
+ */
+
+@Configuration
+public class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
+
+    @Override
+    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
+
+        BeanDefinition beanDefinition = beanFactory.getBeanDefinition("demoService");
+
+
+        MutablePropertyValues propertyValues = beanDefinition.getPropertyValues();
+
+        propertyValues.addPropertyValue("a", "b");
+        propertyValues.addPropertyValue("b", "a");
+
+        // todo zsx
+
+
+        System.out.println("MyBeanFactoryPostProcessor.postProcessBeanFactory");
+    }
+}

springboot3.0/springboot335/src/main/java/com/springboot335/springboot335/config/MyBeanPostProcessor.java

@@ -35,10 +35,14 @@ public Object postProcessBeforeInitialization(Object bean, String beanName) thro
         Method[] declaredMethods = bean.getClass().getDeclaredMethods();
         for (Method declaredMethod : declaredMethods) {
             try {
-                System.out.println("declaredMethod = " + declaredMethod);
-                Object invoke = declaredMethod.invoke(bean, null);
 
-                System.out.println("invoke = " + invoke);
+                if (declaredMethod.getName().equals("testGet")) {
+                    System.out.println("declaredMethod = " + declaredMethod);
+                    Object invoke = declaredMethod.invoke(bean, null);
+
+                    System.out.println("invoke = " + invoke);
+                }
+
             } catch (IllegalAccessException e) {
                 throw new RuntimeException(e);
             } catch (InvocationTargetException e) {

springboot3.0/springboot335/src/main/java/com/springboot335/springboot335/demo/DemoService.java

@@ -5,10 +5,24 @@
 @Service
 public class DemoService {
 
+    private String a = "a";
+    private String b = "b";
+
 
     public String testGet() {
+
+        System.out.println("a = " + a);
+        System.out.println("b = " + b);
+
         return "get";
     }
 
 
+    public void setA(String a) {
+        this.a = a;
+    }
+
+    public void setB(String b) {
+        this.b = b;
+    }
 }