diff --git a/README.md b/README.md
index 690e013..0b63ea4 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,10 @@
 
 ### SpringBoot
 - [SpringBoot run方法解析](/docs/SpringBoot/Spring-Boot-Run.md)
+- [SpringBoot 配置加载解析](/docs/SpringBoot/SpringBoot-application-load.md)
+- [SpringBoot 自动装配](/docs/SpringBoot/SpringBoot-自动装配.md)
+- [SpringBoot ConfigurationProperties](/docs/SpringBoot/SpringBoot-ConfigurationProperties.md)
+- [SpringBoot 日志系统](/docs/SpringBoot/SpringBoot-LogSystem.md)
 
 
 ## MyBatis
diff --git a/docs/SpringBoot/SpringBoot-ConfigurationProperties.md b/docs/SpringBoot/SpringBoot-ConfigurationProperties.md
new file mode 100644
index 0000000..292d7ae
--- /dev/null
+++ b/docs/SpringBoot/SpringBoot-ConfigurationProperties.md
@@ -0,0 +1,598 @@
+# SpringBoot ConfigurationProperties
+- Author: [HuiFer](https://github.com/huifer)
+- 源码阅读仓库: [SourceHot-spring-boot](https://github.com/SourceHot/spring-boot-read)
+
+- 本文主要对`org.springframework.boot.context.properties.ConfigurationProperties`进行分析
+
+## ConfigurationProperties
+
+- 顶部注释
+
+```java
+ * @see ConfigurationPropertiesScan
+ * @see ConstructorBinding
+ * @see ConfigurationPropertiesBindingPostProcessor
+ * @see EnableConfigurationProperties
+```
+
+
+
+看到`ConfigurationPropertiesScan` 去看看这个
+
+## ConfigurationPropertiesScan
+
+```JAVA
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Import(ConfigurationPropertiesScanRegistrar.class)
+@EnableConfigurationProperties
+public @interface ConfigurationPropertiesScan {}
+```
+
+- 熟悉的**Import**注解
+
+
+
+## ConfigurationPropertiesScanRegistrar
+
+![image-20200323094446756](/images/SpringBoot/image-20200323094446756.png)
+
+- debug没有抓到后续补充
+
+
+
+## EnableConfigurationProperties
+
+```JAVA
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Import(EnableConfigurationPropertiesRegistrar.class)
+public @interface EnableConfigurationProperties {
+}
+```
+
+
+
+
+
+## EnableConfigurationPropertiesRegistrar
+
+- 该类会读取**spring.factories**
+
+- 中`org.springframework.boot.autoconfigure.EnableAutoConfiguration=\` 这样的
+
+  ```
+  org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration
+  org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration
+  org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration
+  org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration
+  org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration
+  org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter
+  org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration
+  org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration
+  org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration
+  org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration
+  org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration
+  org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration
+  org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration
+  org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration
+  org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration
+  ```
+
+  
+
+
+
+```java
+	@Override
+	public void registerBeanDefinitions(AnnotationMetadata metadata, BeanDefinitionRegistry registry) {
+	    // 注册bean
+		registerInfrastructureBeans(registry);
+	  // 配置属性Bean注册器
+		ConfigurationPropertiesBeanRegistrar beanRegistrar = new ConfigurationPropertiesBeanRegistrar(registry);
+		// 循环注册
+		getTypes(metadata).forEach(beanRegistrar::register);
+	}
+
+
+```
+
+
+
+### registerInfrastructureBeans
+
+```JAVA
+	static void registerInfrastructureBeans(BeanDefinitionRegistry registry) {
+	    // 属性绑定后置处理器
+		ConfigurationPropertiesBindingPostProcessor.register(registry);
+		// 属性校验器
+		ConfigurationPropertiesBeanDefinitionValidator.register(registry);
+		ConfigurationBeanFactoryMetadata.register(registry);
+	}
+```
+
+- 此处操作逻辑基本相同,是否存在这个beanName 存在直接注册，不存在补充
+
+#### ConfigurationPropertiesBindingPostProcessor.register(registry)
+
+```JAVA
+	public static void register(BeanDefinitionRegistry registry) {
+		Assert.notNull(registry, "Registry must not be null");
+		// 是否存在
+		if (!registry.containsBeanDefinition(BEAN_NAME)) {
+			GenericBeanDefinition definition = new GenericBeanDefinition();
+			definition.setBeanClass(ConfigurationPropertiesBindingPostProcessor.class);
+			definition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
+			registry.registerBeanDefinition(BEAN_NAME, definition);
+		}
+		ConfigurationPropertiesBinder.register(registry);
+	}
+
+```
+
+
+
+#### ConfigurationPropertiesBeanDefinitionValidator.register(registry)
+
+```JAVA
+	static void register(BeanDefinitionRegistry registry) {
+		Assert.notNull(registry, "Registry must not be null");
+		if (!registry.containsBeanDefinition(BEAN_NAME)) {
+			GenericBeanDefinition definition = new GenericBeanDefinition();
+			definition.setBeanClass(ConfigurationPropertiesBeanDefinitionValidator.class);
+			definition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
+			registry.registerBeanDefinition(BEAN_NAME, definition);
+		}
+		ConfigurationPropertiesBinder.register(registry);
+	}
+
+```
+
+
+
+### getTypes(metadata).forEach(beanRegistrar::register)
+
+- 先看输入参数 **metadata**
+
+![image-20200323134135926](/images/SpringBoot/image-20200323134135926.png)
+
+
+
+- getTypes结果
+
+![image-20200323134325955](/images/SpringBoot/image-20200323134325955.png)
+
+
+
+
+
+- 源码开始，先找出刚才的对象`org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration`
+
+  ```JAVA
+  @Configuration(proxyBeanMethods = false)
+  @AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
+  @ConditionalOnClass(ServletRequest.class)
+  @ConditionalOnWebApplication(type = Type.SERVLET)
+  @EnableConfigurationProperties(ServerProperties.class)
+  @Import({ ServletWebServerFactoryAutoConfiguration.BeanPostProcessorsRegistrar.class,
+  		ServletWebServerFactoryConfiguration.EmbeddedTomcat.class,
+  		ServletWebServerFactoryConfiguration.EmbeddedJetty.class,
+  		ServletWebServerFactoryConfiguration.EmbeddedUndertow.class })
+  public class ServletWebServerFactoryAutoConfiguration {}
+  ```
+
+  
+
+```JAVA
+    /**
+     * 找出 {@link EnableConfigurationProperties} 注解标记的中的属性值,并且返回值不是void
+     * @param metadata
+     * @return
+     */
+	private Set<Class<?>> getTypes(AnnotationMetadata metadata) {
+		return
+
+		 metadata.getAnnotations().stream(EnableConfigurationProperties.class)
+				.flatMap((annotation) -> Arrays.stream(annotation.getClassArray(MergedAnnotation.VALUE)))
+				.filter((type) -> void.class != type).collect(Collectors.toSet());
+	}
+
+
+```
+
+- 这里我们可以直接知道返回的是`@EnableConfigurationProperties(ServerProperties.class)` 的数据值: `ServerProperties.class`
+
+
+
+循环注册
+
+```java
+	void register(Class<?> type) {
+		MergedAnnotation<ConfigurationProperties> annotation = MergedAnnotations
+				.from(type, SearchStrategy.TYPE_HIERARCHY).get(ConfigurationProperties.class);
+		register(type, annotation);
+	}
+
+```
+
+
+
+
+
+
+
+
+
+---
+
+
+
+## ConfigurationPropertiesBindingPostProcessor
+
+![image-20200323095626953](/images/SpringBoot/image-20200323095626953.png)
+
+
+
+### postProcessBeforeInitialization
+
+```JAVA
+	@Override
+	public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
+		// 绑定
+		bind(ConfigurationPropertiesBean.get(this.applicationContext, bean, beanName));
+		return bean;
+	}
+
+```
+
+
+
+- get
+
+  ```java
+  	public static ConfigurationPropertiesBean get(ApplicationContext applicationContext, Object bean, String beanName) {
+  		// 寻找工厂方法
+  		Method factoryMethod = findFactoryMethod(applicationContext, beanName);
+  		// 创建 ConfigurationPropertiesBean
+  		return create(beanName, bean, bean.getClass(), factoryMethod);
+  	}
+  
+  ```
+
+  
+
+```java
+	private static Method findFactoryMethod(ConfigurableListableBeanFactory beanFactory, String beanName) {
+		// 判断是否存在这个beanName
+		if (beanFactory.containsBeanDefinition(beanName)) {
+		    // 获取bean定义
+			BeanDefinition beanDefinition = beanFactory.getMergedBeanDefinition(beanName);
+			// 类型判断
+			if (beanDefinition instanceof RootBeanDefinition) {
+			    // 解析方法
+				Method resolvedFactoryMethod = ((RootBeanDefinition) beanDefinition).getResolvedFactoryMethod();
+				if (resolvedFactoryMethod != null) {
+					return resolvedFactoryMethod;
+				}
+			}
+			return findFactoryMethodUsingReflection(beanFactory, beanDefinition);
+		}
+		return null;
+	}
+
+```
+
+
+
+```java
+	private static Method findFactoryMethodUsingReflection(ConfigurableListableBeanFactory beanFactory,
+			BeanDefinition beanDefinition) {
+		// 工厂方法
+		String factoryMethodName = beanDefinition.getFactoryMethodName();
+		// 工厂bean
+		String factoryBeanName = beanDefinition.getFactoryBeanName();
+		if (factoryMethodName == null || factoryBeanName == null) {
+			return null;
+		}
+		// 转换对象
+		Class<?> factoryType = beanFactory.getType(factoryBeanName);
+		if (factoryType.getName().contains(ClassUtils.CGLIB_CLASS_SEPARATOR)) {
+			factoryType = factoryType.getSuperclass();
+		}
+		AtomicReference<Method> factoryMethod = new AtomicReference<>();
+		ReflectionUtils.doWithMethods(factoryType, (method) -> {
+			  // 判断是否是需要的方法
+		    if (method.getName().equals(factoryMethodName)) {
+				// 设置方法
+				factoryMethod.set(method);
+			}
+		});
+		// 返回方法
+		return factoryMethod.get();
+	}
+
+```
+
+
+
+
+
+### create
+
+- `org.springframework.boot.context.properties.ConfigurationPropertiesBean#create`
+
+```JAVA
+	private static ConfigurationPropertiesBean create(String name, Object instance, Class<?> type, Method factory) {
+		// 找注解
+		ConfigurationProperties annotation = findAnnotation(instance, type, factory, ConfigurationProperties.class);
+		if (annotation == null) {
+			return null;
+		}
+		// 找注解
+		Validated validated = findAnnotation(instance, type, factory, Validated.class);
+		// 注解列表
+		Annotation[] annotations = (validated != null) ? new Annotation[] { annotation, validated }
+				: new Annotation[] { annotation };
+		// 类型解析
+		ResolvableType bindType = (factory != null) ? ResolvableType.forMethodReturnType(factory)
+				: ResolvableType.forClass(type);
+		// 绑定结果对象
+		Bindable<Object> bindTarget = Bindable.of(bindType).withAnnotations(annotations);
+		if (instance != null) {
+			bindTarget = bindTarget.withExistingValue(instance);
+		}
+		return new ConfigurationPropertiesBean(name, instance, annotation, bindTarget);
+	}
+
+```
+
+
+
+- 第一个需要做的类: `org.springframework.boot.autoconfigure.web.ServerProperties`
+
+
+
+- `annotation`
+
+![image-20200323104711545](/images/SpringBoot/image-20200323104711545.png)
+
+- `bindType`
+
+![image-20200323104815305](/images/SpringBoot/image-20200323104815305.png)
+
+- 返回对象
+
+![image-20200323105053757](/images/SpringBoot/image-20200323105053757.png)
+
+- 此时数据还没有进去
+
+
+
+
+
+#### bind
+
+- 数据绑定
+
+直接看结果
+
+![image-20200323105155998](/images/SpringBoot/image-20200323105155998.png)
+
+- 上述配置和我在配置文件中写的配置一致
+
+
+
+```yml
+server:
+  port: 9999
+
+```
+
+- 具体方法: `org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor#bind`
+
+```java
+	private void bind(ConfigurationPropertiesBean bean) {
+		if (bean == null || hasBoundValueObject(bean.getName())) {
+			return;
+		}
+		Assert.state(bean.getBindMethod() == BindMethod.JAVA_BEAN, "Cannot bind @ConfigurationProperties for bean '"
+				+ bean.getName() + "'. Ensure that @ConstructorBinding has not been applied to regular bean");
+		try {
+			// 最终的绑定
+			this.binder.bind(bean);
+		}
+		catch (Exception ex) {
+			throw new ConfigurationPropertiesBindException(bean, ex);
+		}
+	}
+
+```
+
+
+
+```java
+BindResult<?> bind(ConfigurationPropertiesBean propertiesBean) {
+	    // 最后的结果
+		Bindable<?> target = propertiesBean.asBindTarget();
+		// 注解获取
+		ConfigurationProperties annotation = propertiesBean.getAnnotation();
+		// 获取处理器
+		BindHandler bindHandler = getBindHandler(target, annotation);
+		// 
+		return getBinder().bind(annotation.prefix(), target, bindHandler);
+	}
+```
+
+![image-20200323105830138](/images/SpringBoot/image-20200323105830138.png)
+
+
+
+##### findProperty
+
+```JAVA
+	private ConfigurationProperty findProperty(ConfigurationPropertyName name, Context context) {
+		if (name.isEmpty()) {
+			return null;
+		}
+		for (ConfigurationPropertySource source : context.getSources()) {
+		    // 获取具体的一个属性值
+			ConfigurationProperty property = source.getConfigurationProperty(name);
+			if (property != null) {
+				return property;
+			}
+		}
+		return null;
+	}
+
+```
+
+
+
+- `org.springframework.boot.context.properties.source.SpringConfigurationPropertySource#getConfigurationProperty`
+
+  ```JAVA
+  	@Override
+  	public ConfigurationProperty getConfigurationProperty(ConfigurationPropertyName name) {
+  		PropertyMapping[] mappings = getMapper().map(name);
+  		return find(mappings, name);
+  	}
+  
+  ```
+
+  ```JAVA
+  
+  	protected final ConfigurationProperty find(PropertyMapping[] mappings, ConfigurationPropertyName name) {
+  		for (PropertyMapping candidate : mappings) {
+  			if (candidate.isApplicable(name)) {
+  				ConfigurationProperty result = find(candidate);
+  				if (result != null) {
+  					return result;
+  				}
+  			}
+  		}
+  		return null;
+  	}
+  
+  ```
+
+  ```JAVA
+  	private ConfigurationProperty find(PropertyMapping mapping) {
+  	    // 需要读取的配置信息的key
+  		String propertySourceName = mapping.getPropertySourceName();
+  		// 信息的value
+  		Object value = getPropertySource().getProperty(propertySourceName);
+  		if (value == null) {
+  			return null;
+  		}
+  		// 创建对象
+  		ConfigurationPropertyName configurationPropertyName = mapping.getConfigurationPropertyName();
+  		Origin origin = PropertySourceOrigin.get(this.propertySource, propertySourceName);
+  		// 包装返回
+  		return ConfigurationProperty.of(configurationPropertyName, value, origin);
+  	}
+  
+  ```
+
+  
+
+
+
+
+
+![image-20200323115408877](/images/SpringBoot/image-20200323115408877.png)
+
+
+
+![image-20200323115701118](/images/SpringBoot/image-20200323115701118.png)
+
+
+
+![image-20200323115711826](/images/SpringBoot/image-20200323115711826.png)
+
+
+
+
+
+##### getBindHandler
+
+```java
+private <T> BindHandler getBindHandler(Bindable<T> target, ConfigurationProperties annotation) {
+		// 获取校验接口列表
+		List<Validator> validators = getValidators(target);
+		// 处理器
+		BindHandler handler = new IgnoreTopLevelConverterNotFoundBindHandler();
+		if (annotation.ignoreInvalidFields()) {
+			// 忽略错误的绑定处理器
+			handler = new IgnoreErrorsBindHandler(handler);
+		}
+		if (!annotation.ignoreUnknownFields()) {
+			UnboundElementsSourceFilter filter = new UnboundElementsSourceFilter();
+			// 未绑定元素处理器
+			handler = new NoUnboundElementsBindHandler(handler, filter);
+		}
+		if (!validators.isEmpty()) {
+			// 校验绑定处理器
+			handler = new ValidationBindHandler(handler, validators.toArray(new Validator[0]));
+		}
+		for (ConfigurationPropertiesBindHandlerAdvisor advisor : getBindHandlerAdvisors()) {
+			// handler
+			handler = advisor.apply(handler);
+		}
+		return handler;
+	}
+```
+
+- 最终获取得到的处理器
+
+![image-20200323110603959](/images/SpringBoot/image-20200323110603959.png)
+
+
+
+- 最后的bind
+
+```java
+	private <T> Object bindObject(ConfigurationPropertyName name, Bindable<T> target, BindHandler handler,
+			Context context, boolean allowRecursiveBinding) {
+	    // 获取属性
+		ConfigurationProperty property = findProperty(name, context);
+		if (property == null && containsNoDescendantOf(context.getSources(), name) && context.depth != 0) {
+			return null;
+		}
+		AggregateBinder<?> aggregateBinder = getAggregateBinder(target, context);
+		if (aggregateBinder != null) {
+			return bindAggregate(name, target, handler, context, aggregateBinder);
+		}
+		if (property != null) {
+			try {
+				return bindProperty(target, context, property);
+			}
+			catch (ConverterNotFoundException ex) {
+				// We might still be able to bind it using the recursive binders
+				Object instance = bindDataObject(name, target, handler, context, allowRecursiveBinding);
+				if (instance != null) {
+					return instance;
+				}
+				throw ex;
+			}
+		}
+		return bindDataObject(name, target, handler, context, allowRecursiveBinding);
+	}
+
+```
+
+
+
+
+
+![image-20200323112945449](/images/SpringBoot/image-20200323112945449.png)
+
+
+
+
+
+配置信息到此绑定成功,关于如何处理集合相关的配置请各位读者自行学习
+
+----
+
diff --git a/docs/SpringBoot/SpringBoot-LogSystem.md b/docs/SpringBoot/SpringBoot-LogSystem.md
new file mode 100644
index 0000000..2fa0c15
--- /dev/null
+++ b/docs/SpringBoot/SpringBoot-LogSystem.md
@@ -0,0 +1,511 @@
+# SpringBoot 日志系统
+- Author: [HuiFer](https://github.com/huifer)
+- 源码阅读仓库: [SourceHot-spring-boot](https://github.com/SourceHot/spring-boot-read)
+
+- 包路径: `org.springframework.boot.logging`
+
+## 日志级别
+- 日志级别: `org.springframework.boot.logging.LogLevel`
+```java
+public enum LogLevel {
+	TRACE, DEBUG, INFO, WARN, ERROR, FATAL, OFF
+}
+```
+
+
+
+
+
+## java 日志实现
+
+- `org.springframework.boot.logging.java.JavaLoggingSystem`
+
+![image-20200323144523848](/images/SpringBoot/image-20200323144523848.png)
+
+```JAVA
+	static {
+	    // KEY :  springBoot 定义的日志级别, value: jdk 定义的日志级别
+		LEVELS.map(LogLevel.TRACE, Level.FINEST);
+		LEVELS.map(LogLevel.DEBUG, Level.FINE);
+		LEVELS.map(LogLevel.INFO, Level.INFO);
+		LEVELS.map(LogLevel.WARN, Level.WARNING);
+		LEVELS.map(LogLevel.ERROR, Level.SEVERE);
+		LEVELS.map(LogLevel.FATAL, Level.SEVERE);
+		LEVELS.map(LogLevel.OFF, Level.OFF);
+	}
+```
+
+- LEVELS 对象
+
+  ```java
+  	protected static class LogLevels<T> {
+  
+        /**
+         * key ： SpringBoot 中定义的日志级别, value: 其他日志框架的日志级别
+         */
+  		private final Map<LogLevel, T> systemToNative;
+  
+        /**
+         * key : 其他日志框架的日志级别 , value: springBoot 中定义中定义的日志级别
+         */
+  		private final Map<T, LogLevel> nativeToSystem;
+      }
+  ```
+
+  
+
+## LoggingSystem
+
+- 抽象类
+- `org.springframework.boot.logging.LoggingSystem`
+
+- 一个map对象: `SYSTEMS`
+
+```JAVA
+	/**
+	 * key: 第三方日志框架的类 value: springBoot 中的处理类
+	 */
+	private static final Map<String, String> SYSTEMS;
+
+	static {
+		Map<String, String> systems = new LinkedHashMap<>();
+		systems.put("ch.qos.logback.core.Appender", "org.springframework.boot.logging.logback.LogbackLoggingSystem");
+		systems.put("org.apache.logging.log4j.core.impl.Log4jContextFactory",
+				"org.springframework.boot.logging.log4j2.Log4J2LoggingSystem");
+		systems.put("java.util.logging.LogManager", "org.springframework.boot.logging.java.JavaLoggingSystem");
+		SYSTEMS = Collections.unmodifiableMap(systems);
+	}
+
+```
+
+
+
+- 各个抽象方法
+
+
+
+| 方法名称                | 作用                               |
+| ----------------------- | ---------------------------------- |
+| beforeInitialize        | 初始化之前调用，目的是减少日志输出 |
+| initialize              | 初始化日志                         |
+| cleanUp                 | 清除日志                           |
+| getShutdownHandler      |                                    |
+| getSupportedLogLevels   | 获取支持的日志级别                 |
+| setLogLevel             | 设置日志级别                       |
+| getLoggerConfigurations | 获取日志配置                       |
+
+
+
+### get
+
+```java
+public static LoggingSystem get(ClassLoader classLoader) {
+	    // 获取系统属性
+		String loggingSystem = System.getProperty(SYSTEM_PROPERTY);
+
+		if (StringUtils.hasLength(loggingSystem)) {
+		    // 是不是NONE
+			if (NONE.equals(loggingSystem)) {
+			    // 空的日志系统
+				return new NoOpLoggingSystem();
+			}
+			return get(classLoader, loggingSystem);
+		}
+		// 循环所有日志,
+		return SYSTEMS.entrySet().stream().filter((entry) -> ClassUtils.isPresent(entry.getKey(), classLoader))
+				.map((entry) ->
+				// 实例化具体日志
+				 get(classLoader, entry.getValue())).findFirst()
+				.orElseThrow(() -> new IllegalStateException("No suitable logging system located"));
+	}
+```
+
+- 实例化日志系统
+
+```java
+	private static LoggingSystem get(ClassLoader classLoader, String loggingSystemClass) {
+		try {
+			Class<?> systemClass = ClassUtils.forName(loggingSystemClass, classLoader);
+			Constructor<?> constructor = systemClass.getDeclaredConstructor(ClassLoader.class);
+			constructor.setAccessible(true);
+			return (LoggingSystem) constructor.newInstance(classLoader);
+		}
+		catch (Exception ex) {
+			throw new IllegalStateException(ex);
+		}
+	}
+
+```
+
+
+
+
+
+![image-20200323151409473](/images/SpringBoot/image-20200323151409473.png)
+
+
+
+- 默认日志: `org.springframework.boot.logging.logback.LogbackLoggingSystem`
+
+### beforeInitialize
+
+- 初始化之前
+
+  ![image-20200323154205484](/images/SpringBoot/image-20200323154205484.png)
+
+  - 链路
+    1. `org.springframework.boot.context.logging.LoggingApplicationListener#onApplicationEvent`
+    2. `org.springframework.boot.context.logging.LoggingApplicationListener#onApplicationStartingEvent`
+    3. `org.springframework.boot.logging.LoggingSystem#beforeInitialize`
+
+- 因为前文中我们已知对象是：`org.springframework.boot.logging.logback.LogbackLoggingSystem` 直接看这个类的**`beforeInitialize`**方法
+
+  ```JAVA
+  	@Override
+  	public void beforeInitialize() {
+  	    // 日志上下文
+  		LoggerContext loggerContext = getLoggerContext();
+  		// 是否初始化
+  		if (isAlreadyInitialized(loggerContext)) {
+  			return;
+  		}
+  		// 父类方法
+  		super.beforeInitialize();
+  		// 添加过滤器
+  		loggerContext.getTurboFilterList().add(FILTER);
+  	}
+  
+  ```
+
+  
+
+
+
+- 初始化之前的的操作完成了初始化方法开始
+
+### initialize
+
+- `org.springframework.boot.context.logging.LoggingApplicationListener#onApplicationEnvironmentPreparedEvent`
+
+  ```JAVA
+  	private void onApplicationEnvironmentPreparedEvent(ApplicationEnvironmentPreparedEvent event) {
+  		if (this.loggingSystem == null) {
+  			this.loggingSystem = LoggingSystem.get(event.getSpringApplication().getClassLoader());
+  		}
+  		initialize(event.getEnvironment(), event.getSpringApplication().getClassLoader());
+  	}
+  
+  ```
+
+  
+
+- `org.springframework.boot.context.logging.LoggingApplicationListener#initializeSystem`
+
+  ```JAVA
+  	protected void initialize(ConfigurableEnvironment environment, ClassLoader classLoader) {
+  		new LoggingSystemProperties(environment).apply();
+  		this.logFile = LogFile.get(environment);
+  		if (this.logFile != null) {
+  			this.logFile.applyToSystemProperties();
+  		}
+  		this.loggerGroups = new LoggerGroups(DEFAULT_GROUP_LOGGERS);
+  		// 早期 的日志级别
+  		initializeEarlyLoggingLevel(environment);
+  		// 初始化日志系统
+  		initializeSystem(environment, this.loggingSystem, this.logFile);
+  		// 初始化日志级别
+  		initializeFinalLoggingLevels(environment, this.loggingSystem);
+  		registerShutdownHookIfNecessary(environment, this.loggingSystem);
+  	}
+  
+  ```
+
+  ```JAVA
+  	private void initializeSystem(ConfigurableEnvironment environment, LoggingSystem system, LogFile logFile) {
+  		LoggingInitializationContext initializationContext = new LoggingInitializationContext(environment);
+  		String logConfig = environment.getProperty(CONFIG_PROPERTY);
+  		if (ignoreLogConfig(logConfig)) {
+  		    // 日志系统初始化
+  			system.initialize(initializationContext, null, logFile);
+  		}
+  		else {
+  			try {
+  				ResourceUtils.getURL(logConfig).openStream().close();
+  				system.initialize(initializationContext, logConfig, logFile);
+  			}
+  			catch (Exception ex) {
+  				// NOTE: We can't use the logger here to report the problem
+  				System.err.println("Logging system failed to initialize using configuration from '" + logConfig + "'");
+  				ex.printStackTrace(System.err);
+  				throw new IllegalStateException(ex);
+  			}
+  		}
+  	}
+  	
+  ```
+
+
+
+- `org.springframework.boot.logging.logback.LogbackLoggingSystem#initialize`
+
+```java
+	@Override
+	public void initialize(LoggingInitializationContext initializationContext, String configLocation, LogFile logFile) {
+		LoggerContext loggerContext = getLoggerContext();
+		if (isAlreadyInitialized(loggerContext)) {
+			return;
+		}
+		// 日志初始化
+		super.initialize(initializationContext, configLocation, logFile);
+		loggerContext.getTurboFilterList().remove(FILTER);
+		markAsInitialized(loggerContext);
+		if (StringUtils.hasText(System.getProperty(CONFIGURATION_FILE_PROPERTY))) {
+			getLogger(LogbackLoggingSystem.class.getName()).warn("Ignoring '" + CONFIGURATION_FILE_PROPERTY
+					+ "' system property. Please use 'logging.config' instead.");
+		}
+	}
+
+```
+
+
+
+- `org.springframework.boot.logging.AbstractLoggingSystem#initializeWithConventions`
+
+  ```JAVA
+  	private void initializeWithConventions(LoggingInitializationContext initializationContext, LogFile logFile) {
+  		String config = getSelfInitializationConfig();
+  		if (config != null && logFile == null) {
+  			// self initialization has occurred, reinitialize in case of property changes
+  			reinitialize(initializationContext);
+  			return;
+  		}
+  		if (config == null) {
+  			config = getSpringInitializationConfig();
+  		}
+  		if (config != null) {
+  			loadConfiguration(initializationContext, config, logFile);
+  			return;
+  		}
+  		// 加载默认配置
+  		loadDefaults(initializationContext, logFile);
+  	}
+  
+  ```
+
+  - `org.springframework.boot.logging.logback.LogbackLoggingSystem#loadDefaults` 
+
+    ```JAVA
+    	@Override
+    	protected void loadDefaults(LoggingInitializationContext initializationContext, LogFile logFile) {
+    		LoggerContext context = getLoggerContext();
+    		stopAndReset(context);
+    		boolean debug = Boolean.getBoolean("logback.debug");
+    		if (debug) {
+    			StatusListenerConfigHelper.addOnConsoleListenerInstance(context, new OnConsoleStatusListener());
+    		}
+    		LogbackConfigurator configurator = debug ? new DebugLogbackConfigurator(context)
+    				: new LogbackConfigurator(context);
+    		Environment environment = initializationContext.getEnvironment();
+    		context.putProperty(LoggingSystemProperties.LOG_LEVEL_PATTERN,
+    				environment.resolvePlaceholders("${logging.pattern.level:${LOG_LEVEL_PATTERN:%5p}}"));
+    		context.putProperty(LoggingSystemProperties.LOG_DATEFORMAT_PATTERN, environment.resolvePlaceholders(
+    				"${logging.pattern.dateformat:${LOG_DATEFORMAT_PATTERN:yyyy-MM-dd HH:mm:ss.SSS}}"));
+    		context.putProperty(LoggingSystemProperties.ROLLING_FILE_NAME_PATTERN, environment
+    				.resolvePlaceholders("${logging.pattern.rolling-file-name:${LOG_FILE}.%d{yyyy-MM-dd}.%i.gz}"));
+    		new DefaultLogbackConfiguration(initializationContext, logFile).apply(configurator);
+    		context.setPackagingDataEnabled(true);
+    	}
+    
+    ```
+
+
+
+
+
+```JAVA
+	@Override
+	public void initialize(LoggingInitializationContext initializationContext, String configLocation, LogFile logFile) {
+		LoggerContext loggerContext = getLoggerContext();
+		// 是否加载过
+		if (isAlreadyInitialized(loggerContext)) {
+			return;
+		}
+		// 日志初始化
+		super.initialize(initializationContext, configLocation, logFile);
+		// 删除 FILTER
+		loggerContext.getTurboFilterList().remove(FILTER);
+		// 初始化标记
+		markAsInitialized(loggerContext);
+		if (StringUtils.hasText(System.getProperty(CONFIGURATION_FILE_PROPERTY))) {
+			getLogger(LogbackLoggingSystem.class.getName()).warn("Ignoring '" + CONFIGURATION_FILE_PROPERTY
+					+ "' system property. Please use 'logging.config' instead.");
+		}
+	}
+```
+
+
+
+标记`markAsInitialized`
+
+```JAVA
+	private void markAsInitialized(LoggerContext loggerContext) {
+		loggerContext.putObject(LoggingSystem.class.getName(), new Object());
+	}
+
+```
+
+
+
+此时日志初始化完成
+
+
+
+
+
+### 默认配置文件
+
+- `getStandardConfigLocations` 这个方法定义了默认配置文件有哪些
+
+```java
+	@Override
+	protected String[] getStandardConfigLocations() {
+		return new String[] { "logback-test.groovy", "logback-test.xml", "logback.groovy", "logback.xml" };
+	}
+
+```
+
+
+
+
+
+- 切回`org.springframework.boot.logging.AbstractLoggingSystem#initializeWithConventions`方法
+
+
+
+- 添加依赖
+
+```XML
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-logging</artifactId>
+			<version>${revision}</version>
+		</dependency>
+
+```
+
+- 添加配置文件
+
+![image-20200323161442058](/images/SpringBoot/image-20200323161442058.png)
+
+
+
+
+
+![image-20200323161522570](/images/SpringBoot/image-20200323161522570.png)
+
+- 此时配置文件地址出现了
+
+
+
+```JAVA
+	protected String getSelfInitializationConfig() {
+	    // 寻找配置文件
+		return findConfig(getStandardConfigLocations());
+	}
+
+```
+
+```JAVA
+	@Override
+	protected String[] getStandardConfigLocations() {
+		return new String[] { "logback-test.groovy", "logback-test.xml", "logback.groovy", "logback.xml" };
+	}
+
+```
+
+```JAVA
+	private String findConfig(String[] locations) {
+		for (String location : locations) {
+			ClassPathResource resource = new ClassPathResource(location, this.classLoader);
+			if (resource.exists()) {
+				return "classpath:" + location;
+			}
+		}
+		return null;
+	}
+
+```
+
+- 此时自定义配置文件如何获取的已经明了
+
+
+
+#### reinitialize
+
+```JAVA
+	@Override
+	protected void reinitialize(LoggingInitializationContext initializationContext) {
+		// 日志上下文重新设置
+		getLoggerContext().reset();
+		getLoggerContext().getStatusManager().clear();
+		// 加载配置文件
+		loadConfiguration(initializationContext, getSelfInitializationConfig(), null);
+	}
+
+```
+
+
+
+```JAVA
+	@Override
+	protected void loadConfiguration(LoggingInitializationContext initializationContext, String location,
+			LogFile logFile) {
+	    // 父类方法
+		super.loadConfiguration(initializationContext, location, logFile);
+		// 获取上下文
+		LoggerContext loggerContext = getLoggerContext();
+		// 停止并且重启
+		stopAndReset(loggerContext);
+		try {
+		    // 配置文件加载
+			configureByResourceUrl(initializationContext, loggerContext, ResourceUtils.getURL(location));
+		}
+		catch (Exception ex) {
+			throw new IllegalStateException("Could not initialize Logback logging from " + location, ex);
+		}
+		List<Status> statuses = loggerContext.getStatusManager().getCopyOfStatusList();
+		StringBuilder errors = new StringBuilder();
+		for (Status status : statuses) {
+			if (status.getLevel() == Status.ERROR) {
+				errors.append((errors.length() > 0) ? String.format("%n") : "");
+				errors.append(status.toString());
+			}
+		}
+		if (errors.length() > 0) {
+			throw new IllegalStateException(String.format("Logback configuration error detected: %n%s", errors));
+		}
+	}
+
+```
+
+
+
+```JAVA
+	private void configureByResourceUrl(LoggingInitializationContext initializationContext, LoggerContext loggerContext,
+			URL url) throws JoranException {
+		if (url.toString().endsWith("xml")) {
+		    // logback 日志操作
+			JoranConfigurator configurator = new SpringBootJoranConfigurator(initializationContext);
+			// 设置上下文
+			configurator.setContext(loggerContext);
+			// 执行配置
+			configurator.doConfigure(url);
+		}
+		else {
+			new ContextInitializer(loggerContext).configureByResource(url);
+		}
+	}
+
+```
+
+- 执行配置属于logback 操作源码不在此进行分析
\ No newline at end of file
diff --git a/docs/SpringBoot/SpringBoot-application-load.md b/docs/SpringBoot/SpringBoot-application-load.md
new file mode 100644
index 0000000..c7d6cf3
--- /dev/null
+++ b/docs/SpringBoot/SpringBoot-application-load.md
@@ -0,0 +1,280 @@
+# Spring Boot application 文件加载
+- Author: [HuiFer](https://github.com/huifer)
+- 源码阅读仓库: [SourceHot-spring-boot](https://github.com/SourceHot/spring-boot-read)
+
+
+
+
+
+## 如何找到这个加载的过程
+
+1. 创建配置文件`application.yml`
+
+2. 全局搜索yml
+
+   ![image-20200319083048849](/images/SpringBoot/image-20200319083048849.png)
+
+3. 换成`properties`搜索
+
+   ![image-20200319083140225](/images/SpringBoot/image-20200319083140225.png)
+
+4. 我们以`yml`为例打上断点开始源码追踪
+
+
+
+
+
+看到调用堆栈
+
+![image-20200319083345067](/images/SpringBoot/image-20200319083345067.png)
+
+
+
+- 一步一步回上去看如何调用具体方法的
+
+## ConfigFileApplicationListener
+
+- 配置文件监听器
+
+
+
+### 调用过程
+
+![image-20200319082131146](/images/SpringBoot/image-20200319082131146.png)
+
+![image-20200319082544653](/images/SpringBoot/image-20200319082544653.png)
+
+
+
+`org.springframework.boot.context.config.ConfigFileApplicationListener#addPropertySources`
+
+```java
+protected void addPropertySources(ConfigurableEnvironment environment, ResourceLoader resourceLoader) {
+		RandomValuePropertySource.addToEnvironment(environment);
+		// 加载器加载信息
+		new Loader(environment, resourceLoader).load();
+	}
+```
+
+
+
+
+
+
+
+### Loader 
+
+- 配置资源加载器
+
+
+
+构造方法
+
+```java
+		Loader(ConfigurableEnvironment environment, ResourceLoader resourceLoader) {
+		    // 环境配置
+			this.environment = environment;
+			// 占位符处理器
+			this.placeholdersResolver = new PropertySourcesPlaceholdersResolver(this.environment);
+			// 资源加载器
+			this.resourceLoader = (resourceLoader != null) ? resourceLoader : new DefaultResourceLoader();
+			// 配置信息加载器初始化
+			this.propertySourceLoaders = SpringFactoriesLoader.loadFactories(PropertySourceLoader.class,
+					getClass().getClassLoader());
+		}
+
+```
+
+
+
+- 熟悉的老朋友`this.propertySourceLoaders = SpringFactoriesLoader.loadFactories(PropertySourceLoader.class,      getClass().getClassLoader())`， 看看**`spring.factories`**有什么
+
+  - 搜索目标: `org.springframework.boot.env.PropertySourceLoader`
+
+    ![image-20200319084141748](/images/SpringBoot/image-20200319084141748.png)
+
+
+
+![image-20200319084151997](/images/SpringBoot/image-20200319084151997.png)
+
+观察发现里面有一个`YamlPropertySourceLoader`和我们之前找yml字符串的时候找到的类是一样的。说明搜索方式没有什么问题。
+
+![image-20200319084357652](/images/SpringBoot/image-20200319084357652.png)
+
+初始化完成，后续进行解析了
+
+
+
+
+
+### load 方法
+
+```java
+		void load() {
+			FilteredPropertySource.apply(this.environment, DEFAULT_PROPERTIES, LOAD_FILTERED_PROPERTY,
+					(defaultProperties) -> {
+						this.profiles = new LinkedList<>();
+						this.processedProfiles = new LinkedList<>();
+						this.activatedProfiles = false;
+						this.loaded = new LinkedHashMap<>();
+						// 初始化配置文件
+						initializeProfiles();
+						while (!this.profiles.isEmpty()) {
+							Profile profile = this.profiles.poll();
+							if (isDefaultProfile(profile)) {
+								addProfileToEnvironment(profile.getName());
+							}
+							load(profile, this::getPositiveProfileFilter,
+									addToLoaded(MutablePropertySources::addLast, false));
+							this.processedProfiles.add(profile);
+						}
+						load(null, this::getNegativeProfileFilter, addToLoaded(MutablePropertySources::addFirst, true));
+						addLoadedPropertySources();
+						applyActiveProfiles(defaultProperties);
+					});
+		}
+
+```
+
+### initializeProfiles
+
+- 初始化`private Deque<Profile> profiles;` 属性
+- ![image-20200319084902957](/images/SpringBoot/image-20200319084902957.png)
+
+
+
+
+
+### load
+
+- `org.springframework.boot.context.config.ConfigFileApplicationListener.Loader#load(org.springframework.boot.context.config.ConfigFileApplicationListener.Profile, org.springframework.boot.context.config.ConfigFileApplicationListener.DocumentFilterFactory, org.springframework.boot.context.config.ConfigFileApplicationListener.DocumentConsumer)`
+
+
+
+```JAVA
+private void load(Profile profile, DocumentFilterFactory filterFactory, DocumentConsumer consumer) {
+			getSearchLocations().forEach(
+					// 本地路径
+					(location) -> {
+						// 是不是文件夹
+						boolean isFolder = location.endsWith("/");
+						// 文件名,默认application
+						Set<String> names = isFolder ? getSearchNames() : NO_SEARCH_NAMES;
+						// 循环加载
+						names.forEach((name) -> {
+							load(location, name, profile, filterFactory, consumer);
+						});
+					});
+		}
+```
+
+- 资源路径可能性
+
+![image-20200319085446640](/images/SpringBoot/image-20200319085446640.png)
+
+
+
+该方法采用循环每个路径下面都去尝试一遍
+
+
+
+- 中间过程省略，我们直接看最后的加载行为
+  - `org.springframework.boot.context.config.ConfigFileApplicationListener.Loader#loadDocuments`
+
+```java
+		private List<Document> loadDocuments(PropertySourceLoader loader, String name, Resource resource)
+				throws IOException {
+		    // 文档的缓存key
+			DocumentsCacheKey cacheKey = new DocumentsCacheKey(loader, resource);
+			// 文档信息
+			List<Document> documents = this.loadDocumentsCache.get(cacheKey);
+			if (documents == null) {
+				// 执行加载，将配置文件读取返回
+				List<PropertySource<?>> loaded = loader.load(name, resource);
+				// 数据转换
+				documents = asDocuments(loaded);
+				// 缓存设置
+				this.loadDocumentsCache.put(cacheKey, documents);
+			}
+			return documents;
+		}
+
+```
+
+
+
+此处的`loader.load()`调用具体的loader实现类进行执行方法
+
+
+
+
+
+### yml 解析
+
+```java
+	@Override
+	public List<PropertySource<?>> load(String name, Resource resource) throws IOException {
+		if (!ClassUtils.isPresent("org.yaml.snakeyaml.Yaml", null)) {
+			throw new IllegalStateException(
+					"Attempted to load " + name + " but snakeyaml was not found on the classpath");
+		}
+		// 将资源转换成集合对象
+		List<Map<String, Object>> loaded = new OriginTrackedYamlLoader(resource).load();
+		if (loaded.isEmpty()) {
+			return Collections.emptyList();
+		}
+		List<PropertySource<?>> propertySources = new ArrayList<>(loaded.size());
+		for (int i = 0; i < loaded.size(); i++) {
+			String documentNumber = (loaded.size() != 1) ? " (document #" + i + ")" : "";
+			// 放入返回结果中
+			propertySources.add(new OriginTrackedMapPropertySource(name + documentNumber,
+					Collections.unmodifiableMap(loaded.get(i)), true));
+		}
+		return propertySources;
+	}
+
+```
+
+
+
+![image-20200319090446231](/images/SpringBoot/image-20200319090446231.png)
+
+
+
+
+
+- `PropertiesPropertySourceLoader`解析同理不在次展开描述了
+
+
+
+### asDocuments
+
+```JAVA
+		/**
+		 * 将 {@link PropertySource} 转换成 {@link Document}
+		 * @param loaded
+		 * @return
+		 */
+		private List<Document> asDocuments(List<PropertySource<?>> loaded) {
+			if (loaded == null) {
+				return Collections.emptyList();
+			}
+			return loaded.stream().map(
+					// 循环创建新对象
+					(propertySource) -> {
+						// 对象创建
+						Binder binder = new Binder(ConfigurationPropertySources.from(propertySource),
+								this.placeholdersResolver);
+						/**
+						 * 通过 {@link Binder} 将数据进行绑定，创建 {@link Document}进行返回
+						 */
+						return new Document(propertySource, binder.bind("spring.profiles", STRING_ARRAY).orElse(null),
+								getProfiles(binder, ACTIVE_PROFILES_PROPERTY),
+								getProfiles(binder, INCLUDE_PROFILES_PROPERTY));
+					}).collect(Collectors.toList());
+		}
+
+```
+
+-----
+
diff --git a/docs/SpringBoot/SpringBoot-自动装配.md b/docs/SpringBoot/SpringBoot-自动装配.md
new file mode 100644
index 0000000..8591687
--- /dev/null
+++ b/docs/SpringBoot/SpringBoot-自动装配.md
@@ -0,0 +1,631 @@
+# Spring Boot 自动装配
+- Author: [HuiFer](https://github.com/huifer)
+- 源码阅读仓库: [SourceHot-spring-boot](https://github.com/SourceHot/spring-boot-read)
+
+
+- `org.springframework.boot.autoconfigure.SpringBootApplication`
+```java
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+@SpringBootConfiguration
+@EnableAutoConfiguration
+@ComponentScan(excludeFilters = { @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
+		@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
+public @interface SpringBootApplication {
+
+	@AliasFor(annotation = EnableAutoConfiguration.class)
+	Class<?>[] exclude() default {};
+
+	@AliasFor(annotation = EnableAutoConfiguration.class)
+	String[] excludeName() default {};
+
+	@AliasFor(annotation = ComponentScan.class, attribute = "basePackages")
+	String[] scanBasePackages() default {};
+
+	@AliasFor(annotation = ComponentScan.class, attribute = "basePackageClasses")
+	Class<?>[] scanBasePackageClasses() default {};
+
+	@AliasFor(annotation = Configuration.class)
+	boolean proxyBeanMethods() default true;
+
+}
+
+```
+
+## EnableAutoConfiguration
+
+```java
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Inherited
+@AutoConfigurationPackage
+@Import(AutoConfigurationImportSelector.class)
+public @interface EnableAutoConfiguration {
+    
+}
+```
+
+## AutoConfigurationImportSelector
+
+- 类图
+
+![image-20200320150642022](/images/SpringBoot/image-20200320150642022.png)
+
+## getAutoConfigurationMetadata()
+
+```JAVA
+		@Override
+		public void process(AnnotationMetadata annotationMetadata, DeferredImportSelector deferredImportSelector) {
+			Assert.state(deferredImportSelector instanceof AutoConfigurationImportSelector,
+					() -> String.format("Only %s implementations are supported, got %s",
+							AutoConfigurationImportSelector.class.getSimpleName(),
+							deferredImportSelector.getClass().getName()));
+			AutoConfigurationEntry autoConfigurationEntry = ((AutoConfigurationImportSelector) deferredImportSelector)
+					.getAutoConfigurationEntry(
+							// 加载配置元数据
+							getAutoConfigurationMetadata(), annotationMetadata);
+			this.autoConfigurationEntries.add(autoConfigurationEntry);
+			for (String importClassName : autoConfigurationEntry.getConfigurations()) {
+				this.entries.putIfAbsent(importClassName, annotationMetadata);
+			}
+		}
+
+
+		private AutoConfigurationMetadata getAutoConfigurationMetadata() {
+			if (this.autoConfigurationMetadata == null) {
+				// 加载配置信息
+				this.autoConfigurationMetadata = AutoConfigurationMetadataLoader.loadMetadata(this.beanClassLoader);
+			}
+			return this.autoConfigurationMetadata;
+		}
+
+```
+
+- `org.springframework.boot.autoconfigure.AutoConfigurationMetadataLoader#loadMetadata(java.lang.ClassLoader)`
+
+  ```JAVA
+  	static AutoConfigurationMetadata loadMetadata(ClassLoader classLoader, String path) {
+  		try {
+  
+  		    // 获取资源路径
+  			Enumeration<URL> urls = (classLoader != null) ? classLoader.getResources(path)
+  					: ClassLoader.getSystemResources(path);
+  			Properties properties = new Properties();
+  			while (urls.hasMoreElements()) {
+  				properties.putAll(PropertiesLoaderUtils.loadProperties(new UrlResource(urls.nextElement())));
+  			}
+  			return loadMetadata(properties);
+  		}
+  		catch (IOException ex) {
+  			throw new IllegalArgumentException("Unable to load @ConditionalOnClass location [" + path + "]", ex);
+  		}
+  	}
+  
+  ```
+
+  ![image-20200320160423991](/images/SpringBoot/image-20200320160423991.png)
+
+
+
+- `protected static final String PATH = "META-INF/spring-autoconfigure-metadata.properties";`
+
+  注意： 这个文件在**target**编译后的文件夹中
+
+  相关 Issues : https://github.com/spring-projects/spring-boot/issues/11282
+
+
+
+- 自动装配
+
+  `spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories`
+
+  该文件内存有:
+
+  ```
+  # Auto Configure
+  org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+  org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration,\
+  org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,\
+  org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration,\
+  org.springframework.boot.autoconfigure.batch.BatchAutoConfiguration,\
+  org.springframework.boot.autoconfigure.cache.CacheAutoConfiguration,\
+  ```
+
+  
+
+
+
+![image-20200320162835665](/images/SpringBoot/image-20200320162835665.png)
+
+同样找一下redis
+
+![image-20200320163001728](/images/SpringBoot/image-20200320163001728.png)
+
+
+
+
+
+- 仔细看`org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration`类
+
+
+
+先说注解
+
+```JAVA
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnClass(RedisOperations.class)
+@EnableConfigurationProperties(RedisProperties.class)
+@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
+```
+
+
+
+### EnableConfigurationProperties
+
+`自动映射一个POJO到Spring Boot配置文件（默认是application.properties文件）的属性集。`
+
+- `org.springframework.boot.autoconfigure.data.redis.RedisProperties`
+- 部分redis配置属性
+
+```JAVA
+@ConfigurationProperties(prefix = "spring.redis")
+public class RedisProperties {
+
+	/**
+	 * Database index used by the connection factory.
+	 */
+	private int database = 0;
+
+	/**
+	 * Connection URL. Overrides host, port, and password. User is ignored. Example:
+	 * redis://user:password@example.com:6379
+	 */
+	private String url;
+
+	/**
+	 * Redis server host.
+	 */
+	private String host = "localhost";
+
+	/**
+	 * Login password of the redis server.
+	 */
+	private String password;
+
+	/**
+	 * Redis server port.
+	 */
+	private int port = 6379;
+
+	/**
+	 * Whether to enable SSL support.
+	 */
+	private boolean ssl;
+
+	/**
+	 * Connection timeout.
+	 */
+	private Duration timeout;
+
+	/**
+	 * Client name to be set on connections with CLIENT SETNAME.
+	 */
+	private String clientName;
+
+	
+
+}
+```
+
+
+
+- 找到一个我们用相同方式去寻找到别的一些属性处理如`org.springframework.boot.autoconfigure.jdbc.JdbcProperties` 具体展开请各位读者自行了解了
+
+
+
+
+
+
+
+### AnnotationMetadata
+
+回过头继续我们的主要流程
+
+- `org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.AutoConfigurationGroup#process`
+
+  ![image-20200320163806852](/images/SpringBoot/image-20200320163806852.png)
+
+再此之前我们看过了`getAutoConfigurationMetadata()`的相关操作
+
+关注 	`AnnotationMetadata annotationMetadata` 存储了一些什么
+
+![image-20200320164145286](/images/SpringBoot/image-20200320164145286.png)
+
+这里简单理解
+
+1.  mergedAnnotations 类相关的注解信息	
+2.  annotationTypes 在启动类上的注解列表
+
+
+
+
+
+### getAutoConfigurationEntry
+
+```JAVA
+	protected AutoConfigurationEntry getAutoConfigurationEntry(AutoConfigurationMetadata autoConfigurationMetadata,
+			AnnotationMetadata annotationMetadata) {
+		if (!isEnabled(annotationMetadata)) {
+			return EMPTY_ENTRY;
+		}
+		// 获取注解属性值
+		AnnotationAttributes attributes = getAttributes(annotationMetadata);
+		// 获取候选配置信息
+		List<String> configurations = getCandidateConfigurations(annotationMetadata, attributes);
+		// 删除重复配置
+		configurations = removeDuplicates(configurations);
+		// 获取 exclude 属性
+		Set<String> exclusions = getExclusions(annotationMetadata, attributes);
+		// 校验 exclude 类
+		checkExcludedClasses(configurations, exclusions);
+		// 配置中删除 exclude 的属性值
+		configurations.removeAll(exclusions);
+		// 过滤
+		configurations = filter(configurations, autoConfigurationMetadata);
+		// 触发自动配置事件
+		fireAutoConfigurationImportEvents(configurations, exclusions);
+		// 返回
+		return new AutoConfigurationEntry(configurations, exclusions);
+	}
+
+```
+
+
+
+
+
+### getAttributes
+
+```java
+	protected AnnotationAttributes getAttributes(AnnotationMetadata metadata) {
+	    // name = org.springframework.boot.autoconfigure.EnableAutoConfiguration , 这是一个固定的值
+		String name = getAnnotationClass().getName();
+		// 获取注解的属性
+		AnnotationAttributes attributes = AnnotationAttributes.fromMap(metadata.getAnnotationAttributes(name, true));
+		Assert.notNull(attributes, () -> "No auto-configuration attributes found. Is " + metadata.getClassName()
+				+ " annotated with " + ClassUtils.getShortName(name) + "?");
+		return attributes;
+	}
+
+```
+
+
+
+![image-20200320171138431](/images/SpringBoot/image-20200320171138431.png)
+
+
+
+### getCandidateConfigurations
+
+- 读取`spring.factories`数据
+
+```java
+	protected List<String> getCandidateConfigurations(AnnotationMetadata metadata, AnnotationAttributes attributes) {
+	    // 读取 org.springframework.boot.autoconfigure.EnableAutoConfiguration 相关配置
+		List<String> configurations = SpringFactoriesLoader.loadFactoryNames(getSpringFactoriesLoaderFactoryClass(),
+				getBeanClassLoader());
+		Assert.notEmpty(configurations, "No auto configuration classes found in META-INF/spring.factories. If you "
+				+ "are using a custom packaging, make sure that file is correct.");
+		return configurations;
+	}
+
+```
+
+![image-20200320171734270](/images/SpringBoot/image-20200320171734270.png)
+
+- 第一个是我自己写的一个测试用
+
+  ```properties
+  org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+    org.sourcehot.service.HelloServiceAutoConfiguration
+  ```
+
+  
+
+
+
+
+
+### removeDuplicates
+
+- new 两个对象直接做数据转换，去重
+
+```JAVA
+	protected final <T> List<T> removeDuplicates(List<T> list) {
+		return new ArrayList<>(new LinkedHashSet<>(list));
+	}
+
+```
+
+
+
+
+
+### getExclusions	
+
+```JAVA
+	protected Set<String> getExclusions(AnnotationMetadata metadata, AnnotationAttributes attributes) {
+		Set<String> excluded = new LinkedHashSet<>();
+		// 获取属性 exclude 值转换成list
+		excluded.addAll(asList(attributes, "exclude"));
+      // 获取属性 excludeName 值转换成list
+		excluded.addAll(Arrays.asList(attributes.getStringArray("excludeName")));
+		// 获取 SpringBoot 本身的忽略配置属性
+		excluded.addAll(getExcludeAutoConfigurationsProperty());
+		return excluded;
+	}
+
+```
+
+
+
+### getExcludeAutoConfigurationsProperty
+
+```JAVA
+	private List<String> getExcludeAutoConfigurationsProperty() {
+		if (getEnvironment() instanceof ConfigurableEnvironment) {
+			Binder binder = Binder.get(getEnvironment());
+			// 取出 "spring.autoconfigure.exclude" 转换成list
+			return binder.bind(PROPERTY_NAME_AUTOCONFIGURE_EXCLUDE, String[].class).map(Arrays::asList)
+					.orElse(Collections.emptyList());
+		}
+		String[] excludes = getEnvironment().getProperty(PROPERTY_NAME_AUTOCONFIGURE_EXCLUDE, String[].class);
+		return (excludes != null) ? Arrays.asList(excludes) : Collections.emptyList();
+	}
+
+```
+
+
+
+![image-20200323080611527](/images/SpringBoot/image-20200323080611527.png)
+
+
+
+- 修改启动类
+
+  ```JAVA
+  @SpringBootApplication(excludeName =  { "org.sourcehot.service.HelloServiceAutoConfiguration" })
+  
+  ```
+
+  ![image-20200323081009823](/images/SpringBoot/image-20200323081009823.png)
+
+### checkExcludedClasses
+
+
+
+```JAVA
+	private void checkExcludedClasses(List<String> configurations, Set<String> exclusions) {
+		List<String> invalidExcludes = new ArrayList<>(exclusions.size());
+		for (String exclusion : exclusions) {
+			//
+			if (ClassUtils.isPresent(exclusion, getClass().getClassLoader()) && !configurations.contains(exclusion)) {
+				invalidExcludes.add(exclusion);
+			}
+		}
+		if (!invalidExcludes.isEmpty()) {
+			// 处理忽略的类
+			handleInvalidExcludes(invalidExcludes);
+		}
+	}
+
+```
+
+
+
+- `configurations.removeAll(exclusions)`
+
+  移除忽略的类
+
+### filter
+
+```JAVA
+	private List<String> filter(List<String> configurations, AutoConfigurationMetadata autoConfigurationMetadata) {
+		long startTime = System.nanoTime();
+		String[] candidates = StringUtils.toStringArray(configurations);
+		boolean[] skip = new boolean[candidates.length];
+		boolean skipped = false;
+		// 获取 AutoConfigurationImportFilter 相关配置
+		for (AutoConfigurationImportFilter filter : getAutoConfigurationImportFilters()) {
+		    // 执行 aware 相关接口
+			invokeAwareMethods(filter);
+			// 比较
+			boolean[] match = filter.match(candidates, autoConfigurationMetadata);
+			for (int i = 0; i < match.length; i++) {
+				if (!match[i]) {
+					skip[i] = true;
+					candidates[i] = null;
+					skipped = true;
+				}
+			}
+		}
+		if (!skipped) {
+			return configurations;
+		}
+		List<String> result = new ArrayList<>(candidates.length);
+		for (int i = 0; i < candidates.length; i++) {
+			if (!skip[i]) {
+				result.add(candidates[i]);
+			}
+		}
+		if (logger.isTraceEnabled()) {
+			int numberFiltered = configurations.size() - result.size();
+			logger.trace("Filtered " + numberFiltered + " auto configuration class in "
+					+ TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startTime) + " ms");
+		}
+		return new ArrayList<>(result);
+	}
+
+```
+
+
+
+- `getAutoConfigurationImportFilters()` 从`spring.factories` 获取 `AutoConfigurationImportFilter`的接口
+
+
+
+![image-20200323081903145](/images/SpringBoot/image-20200323081903145.png)
+
+
+
+- 循环内执行`Aware`系列接口
+
+
+
+`match`方法: `org.springframework.boot.autoconfigure.AutoConfigurationImportFilter#match`
+
+- `filter.match(candidates, autoConfigurationMetadata)` 比较判断哪些是需要自动注入的类
+
+
+
+
+
+![image-20200323082553595](/images/SpringBoot/image-20200323082553595.png)
+
+
+
+
+
+
+
+### fireAutoConfigurationImportEvents
+
+```JAVA
+	private void fireAutoConfigurationImportEvents(List<String> configurations, Set<String> exclusions) {
+		// 获取自动配置的监听器列表
+		List<AutoConfigurationImportListener> listeners = getAutoConfigurationImportListeners();
+		if (!listeners.isEmpty()) {
+			// 创建 自动配置事件
+			AutoConfigurationImportEvent event = new AutoConfigurationImportEvent(this, configurations, exclusions);
+			for (AutoConfigurationImportListener listener : listeners) {
+				// 执行 Aware 相关接口
+				invokeAwareMethods(listener);
+				// 监听器执行自动配置事件
+				listener.onAutoConfigurationImportEvent(event);
+			}
+		}
+	}
+
+```
+
+![image-20200323083149737](/images/SpringBoot/image-20200323083149737.png)
+
+
+
+- `AutoConfigurationImportEvent event = new AutoConfigurationImportEvent(this, configurations, exclusions);`
+
+![image-20200323083247061](/images/SpringBoot/image-20200323083247061.png)
+
+- `org.springframework.boot.autoconfigure.AutoConfigurationImportListener#onAutoConfigurationImportEvent` 在执行自动配置时触发 , 实现类只有 **`ConditionEvaluationReportAutoConfigurationImportListener`**
+
+  ```JAVA
+  	@Override
+  	public void onAutoConfigurationImportEvent(AutoConfigurationImportEvent event) {
+  		if (this.beanFactory != null) {
+  			ConditionEvaluationReport report = ConditionEvaluationReport.get(this.beanFactory);
+  			// 记录需要加载的配置
+  			report.recordEvaluationCandidates(event.getCandidateConfigurations());
+  			// 记录不需要加载的配置
+  			report.recordExclusions(event.getExclusions());
+  		}
+  	}
+  
+  ```
+
+  
+
+![image-20200323083656670](/images/SpringBoot/image-20200323083656670.png)
+
+
+
+
+
+- 初始化完
+
+
+
+
+
+## process
+
+- `org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.AutoConfigurationGroup#process`
+
+
+
+![image-20200323084922159](/images/SpringBoot/image-20200323084922159.png)
+
+- 后续的一些行为相对简单，直接放个源码了.
+
+```JAVA
+@Override
+		public void process(AnnotationMetadata annotationMetadata, DeferredImportSelector deferredImportSelector) {
+			Assert.state(deferredImportSelector instanceof AutoConfigurationImportSelector,
+					() -> String.format("Only %s implementations are supported, got %s",
+							AutoConfigurationImportSelector.class.getSimpleName(),
+							deferredImportSelector.getClass().getName()));
+			// 自动装配信息
+			AutoConfigurationEntry autoConfigurationEntry = ((AutoConfigurationImportSelector) deferredImportSelector)
+					.getAutoConfigurationEntry(
+							// 加载配置元数据
+							getAutoConfigurationMetadata(), annotationMetadata);
+			this.autoConfigurationEntries.add(autoConfigurationEntry);
+			// 循环需要自动注入的类
+			for (String importClassName : autoConfigurationEntry.getConfigurations()) {
+				// 继续放入k,v
+				this.entries.putIfAbsent(importClassName, annotationMetadata);
+			}
+		}
+```
+
+
+
+
+
+
+
+## selectImports
+
+```java
+		@Override
+		public Iterable<Entry> selectImports() {
+			if (this.autoConfigurationEntries.isEmpty()) {
+				return Collections.emptyList();
+			}
+			// 获取忽略的类
+			Set<String> allExclusions = this.autoConfigurationEntries.stream()
+					.map(AutoConfigurationEntry::getExclusions).flatMap(Collection::stream).collect(Collectors.toSet());
+
+			// 获取需要注入的类
+			Set<String> processedConfigurations = this.autoConfigurationEntries.stream()
+					.map(AutoConfigurationEntry::getConfigurations).flatMap(Collection::stream)
+					.collect(Collectors.toCollection(LinkedHashSet::new));
+
+			// 把不需要自动注入的类从需要注入的类中移除
+			processedConfigurations.removeAll(allExclusions);
+
+			// 排序
+			return sortAutoConfigurations(processedConfigurations, getAutoConfigurationMetadata()).stream()
+					.map((importClassName) -> new Entry(this.entries.get(importClassName), importClassName))
+					.collect(Collectors.toList());
+		}
+
+```
+
+
+
+
+
+后续由spring进行不再继续跟踪
\ No newline at end of file
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