From d0ec1d342f768cec1608a74700c0fe07547771aa Mon Sep 17 00:00:00 2001
From: AmyliaY <471816751@qq.com>
Date: Tue, 28 Jul 2020 23:01:30 +0800
Subject: [PATCH] =?UTF-8?q?Spring=20IoC=E5=AE=B9=E5=99=A8=E4=B9=8B=20BeanP?=
 =?UTF-8?q?ostProcessor=E6=8E=A5=E5=8F=A3?=
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---
 README.md                            |  1 +
 docs/Spring/IoC/BeanPostProcessor.md | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 docs/Spring/IoC/BeanPostProcessor.md

diff --git a/README.md b/README.md
index 7576584..0a6d9be 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@
 * [将 bean 解析封装成 BeanDefinition](/docs/Spring/IoC/2、将bean解析封装成BeanDefinition.md)
 * [将 BeanDefinition 注册进 IoC 容器](/docs/Spring/IoC/3、将BeanDefinition注册进IoC容器.md)
 * [依赖注入(DI)](/docs/Spring/IoC/4、依赖注入(DI).md)
+* [BeanPostProcessor](/docs/Spring/IoC/BeanPostProcessor.md)
 
 ### AOP
 
diff --git a/docs/Spring/IoC/BeanPostProcessor.md b/docs/Spring/IoC/BeanPostProcessor.md
new file mode 100644
index 0000000..68feca4
--- /dev/null
+++ b/docs/Spring/IoC/BeanPostProcessor.md
@@ -0,0 +1,18 @@
+BeanPostProcessor接口 也叫 Bean后置处理器，作用是在Bean对象实例化和依赖注入完成后，在显示调用bean的init-method(初始化方法)的前后添加我们自己的处理逻辑。注意是Bean实例化完毕后及依赖注入完成后触发的，接口的源码如下。
+
+```java
+public interface BeanPostProcessor {
+    /**
+     * 实例化、依赖注入完毕，
+     * 在调用显示的初始化之前完成一些定制的初始化任务
+     */
+    Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException;
+    
+    /**
+     * 实例化、依赖注入、初始化完毕时执行
+     */
+    Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException;
+}
+```
+
+使用方法也很简单，实现 BeanPostProcessor接口，然后将实现类注入IoC容器即可。
\ No newline at end of file