@@ -1,12 +1,20 @@
 package com.example.springboot.source.code.analysis;
 
+import com.example.springboot.source.code.analysis.initializer.SecondInitializer;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
 public class SpringbootSourceCodeAnalysisApplication {
 
     public static void main(String[] args) {
-        SpringApplication.run(SpringbootSourceCodeAnalysisApplication.class, args);
+        // SpringApplication.run(SpringbootSourceCodeAnalysisApplication.class, args);
+        SpringApplication springApplication = new SpringApplication(SpringbootSourceCodeAnalysisApplication.class);
+
+        // 手动添加一个框架的初始化器
+        springApplication.addInitializers(new SecondInitializer());
+
+        springApplication.run();
+
     }
 }
@@ -24,11 +24,22 @@ public class InitializerController {
 
     /**
      * 测试框架初始化器 ApplicationContextInitializer
+     * 通过 META-INF/spring.factories 配置 ApplicationContextInitializer 的方式
      */
     @RequestMapping(value = "first", method = RequestMethod.GET)
     @ResponseBody
-    public String testFirstInitializer(){
-        return firstInitializerService.getCustomEnvironmentProperty();
+    public String testFirstInitializer() {
+        return firstInitializerService.getCustomEnvironmentProperty("firstKey");
+    }
+
+    /**
+     * 测试框架初始化器 ApplicationContextInitializer
+     * 通过 springApplication.addInitializers(new SecondInitializer()) 的方式
+     */
+    @RequestMapping(value = "second", method = RequestMethod.GET)
+    @ResponseBody
+    public String testSecondInitializer() {
+        return firstInitializerService.getCustomEnvironmentProperty("second");
     }
 
 }
@@ -32,7 +32,7 @@ public void initialize(ConfigurableApplicationContext configurableApplicationCon
 
         // 设置自定义属性
         Map<String, Object> attributeMap = new HashMap<>();
-        attributeMap.put("key1", "value1");
+        attributeMap.put("firstKey", "firstValue");
 
         // 添加自定义属性
         MapPropertySource mapPropertySource = new MapPropertySource("firstInitializer", attributeMap);
 
@@ -0,0 +1,42 @@
+package com.example.springboot.source.code.analysis.initializer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.annotation.Order;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MapPropertySource;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * FirstInitializer 系统初始化器
+ *
+ * @author ipipman
+ * @version V1.0
+ * @date 2021/6/5
+ * @date 2021/6/5 8:20 下午
+ */
+@Order(2) // 设置执行顺序
+public class SecondInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+    private static final Logger logger =  LoggerFactory.getLogger(SecondInitializer.class);
+
+    @Override
+    public void initialize(ConfigurableApplicationContext configurableApplicationContext) {
+        // 获取系统属性
+        ConfigurableEnvironment environment =
+                configurableApplicationContext.getEnvironment();
+
+        // 设置自定义属性
+        Map<String, Object> attributeMap = new HashMap<>();
+        attributeMap.put("secondKey", "secondValue");
+
+        // 添加自定义属性
+        MapPropertySource mapPropertySource = new MapPropertySource("secondInitializer", attributeMap);
+        environment.getPropertySources().addLast(mapPropertySource);
+        logger.info("设置框架初始化器【ApplicationContextInitializer】成功 : run secondInitializer");
+    }
+}
@@ -41,7 +41,7 @@ public void setApplicationContext(@Nullable ApplicationContext applicationContex
     /**
      * 获取在框架初始化器阶段设置的配置信息
      */
-    public String getCustomEnvironmentProperty() {
-        return Optional.ofNullable(applicationContext.getEnvironment().getProperty("key1")).orElse(null);
+    public String getCustomEnvironmentProperty(final String propertyKey) {
+        return Optional.ofNullable(applicationContext.getEnvironment().getProperty(propertyKey)).orElse(null);
     }
 }
Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,7 @@ public void setApplicationContext(@Nullable ApplicationContext applicationContex`
`41`	`41`	`/**`
`42`	`42`	`* 获取在框架初始化器阶段设置的配置信息`
`43`	`43`	`*/`
`44`		`- public String getCustomEnvironmentProperty() {`
`45`		`- return Optional.ofNullable(applicationContext.getEnvironment().getProperty("key1")).orElse(null);`
	`44`	`+ public String getCustomEnvironmentProperty(final String propertyKey) {`
	`45`	`+ return Optional.ofNullable(applicationContext.getEnvironment().getProperty(propertyKey)).orElse(null);`
`46`	`46`	`}`
`47`	`47`	`}`