@@ -0,0 +1,68 @@
+## SpringBoot 2.1.x 框架整体启动流程
+
+### 1、框架初始化步骤
+
+#### 框架初始化步骤-脑图
+
+<img src="https://tva1.sinaimg.cn/large/008i3skNly1gr7mstd139j311w0u01cb.jpg" alt="image-20210605194919123" width="500" align="left" />
+
+#### 框架初始化步骤-源代码
+
+> SpringBoog启动类：org.springframework.boot.SpringApplication
+
+```java
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	public SpringApplication(ResourceLoader resourceLoader, Class<?>... primarySources) {
+    // 配置资源加载器
+		this.resourceLoader = resourceLoader;
+		Assert.notNull(primarySources, "PrimarySources must not be null");
+    
+    // 配置primarySources
+		this.primarySources = new LinkedHashSet<>(Arrays.asList(primarySources));
+    
+    // 应用环境检测
+		this.webApplicationType = WebApplicationType.deduceFromClasspath();
+    
+    // 配置系统初始化器
+		setInitializers((Collection) getSpringFactoriesInstances(ApplicationContextInitializer.class));
+    
+    // 配置应用监听器
+		setListeners((Collection) getSpringFactoriesInstances(ApplicationListener.class));
+    
+    // 配置main方法所在的类
+		this.mainApplicationClass = deduceMainApplicationClass();
+	}
+```
+
+
+
+### 2、启动框架
+
+#### 启动框架-流程
+
+<img src="https://tva1.sinaimg.cn/large/008i3skNly1gr7n4t8byxj32840u0b29.jpg" alt="image-20210605200051981" align="left" width="1000" />
+
+
+
+### 3、框架自动化装配步骤
+
+#### 自动化装配-脑图
+
+<img src="https://tva1.sinaimg.cn/large/008i3skNly1gr7n6t3qd2j31n80ju12l.jpg" alt="image-20210605200241401" width="500" align="left" />
+
+
+
+
+
+### 4、SpringBoot上下文
+
+#### 准备上下文流程
+
+<img src="https://tva1.sinaimg.cn/large/008i3skNly1gr7nby7ctij30y40t4dt7.jpg" alt="image-20210605200740395" width="650" align="left" />
+
+
+
+#### 刷新上下文流程
+
+<img src="https://tva1.sinaimg.cn/large/008i3skNly1gr7ngcduz6j31ym0u07ql.jpg" alt="image-20210605201154951" align="left" />
+
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.4.0</version>
+        <version>2.1.7.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>com.ipman.source.code.analysis.springboot</groupId>
 
@@ -1,6 +1,6 @@
 package com.example.springboot.source.code.analysis;
 
-import org.junit.jupiter.api.Test;
+import org.junit.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest