@Import注解源码分析

spring-annotation-import/src/main/java/com/xcs/spring/ImportApplication.java

@@ -1,6 +1,6 @@
 package com.xcs.spring;
 
-import com.xcs.spring.config.MyConfig;
+import com.xcs.spring.config.MyConfiguration;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 
 /**
@@ -10,7 +10,7 @@ import org.springframework.context.annotation.AnnotationConfigApplicationContext
 public class ImportApplication {
 
     public static void main(String[] args) {
-        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyConfig.class);
+        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyConfiguration.class);
         for (String beanDefinitionName : context.getBeanDefinitionNames()) {
             System.out.println("beanName = " + beanDefinitionName);
         }

spring-annotation-import/src/main/java/com/xcs/spring/bean/MyBean.java

@@ -6,16 +6,4 @@ package com.xcs.spring.bean;
  **/
 public class MyBean {
 
-    private String describe;
-
-    public MyBean(String describe) {
-        this.describe = describe;
-    }
-
-    @Override
-    public String toString() {
-        return "MyBean{" +
-                "describe='" + describe + '\'' +
-                '}';
-    }
 }

spring-annotation-import/src/main/java/com/xcs/spring/bean/MyBeanD.java

@@ -1,8 +0,0 @@
-package com.xcs.spring.bean;
-
-/**
- * @author xcs
- * @date 2023年08月28日 11时13分
- **/
-public class MyBeanD {
-}

spring-annotation-import/src/main/java/com/xcs/spring/bean/User.java

@@ -1,14 +0,0 @@
-package com.xcs.spring.bean;
-
-/**
- * @author xcs
- * @date 2023年08月28日 10时48分
- **/
-public class User {
-
-    private String name;
-
-    public User(String name) {
-        this.name = name;
-    }
-}

spring-annotation-import/src/main/java/com/xcs/spring/config/MyConfig.java

@@ -1,27 +0,0 @@
-package com.xcs.spring.config;
-
-import com.xcs.spring.service.MyService;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Import;
-
-/**
- * @author xcs
- * @date 2023年08月07日 16时25分
- **/
-@Configuration
-// 导入常规的 @Configuration 类
-// @Import(UserConfig.class)
-
-// 导入普通的组件类
-// @Import(MyService.class)
-
-// 使用ImportSelector
-// @Import(CustomImportSelector.class)
-
-// 使用 ImportBeanDefinitionRegistrar
-// @Import(CustomRegistrar.class)
-
-@Import({UserConfig.class, MyService.class, CustomImportSelector.class, CustomDeferredImportSelector.class, CustomRegistrar.class})
-public class MyConfig {
-
-}

spring-annotation-import/src/main/java/com/xcs/spring/config/MyConfiguration.java

@@ -0,0 +1,15 @@
+package com.xcs.spring.config;
+
+import com.xcs.spring.bean.MyBean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+/**
+ * @author xcs
+ * @date 2023年08月07日 16时25分
+ **/
+@Configuration
+@Import({MyBean.class, MyImportSelector.class, MyDeferredImportSelector.class, MyImportBeanDefinitionRegistrar.class})
+public class MyConfiguration {
+
+}

spring-annotation-import/src/main/java/com/xcs/spring/config/MyDeferredImportSelector.java

@@ -1,7 +1,6 @@
 package com.xcs.spring.config;
 
-import com.xcs.spring.bean.MyBeanA;
-import com.xcs.spring.bean.MyBeanC;
+import com.xcs.spring.bean.MyBeanB;
 import org.springframework.context.annotation.DeferredImportSelector;
 import org.springframework.core.type.AnnotationMetadata;
 
@@ -9,10 +8,10 @@ import org.springframework.core.type.AnnotationMetadata;
  * @author xcs
  * @date 2023年08月29日 11时08分
  **/
-public class CustomDeferredImportSelector implements DeferredImportSelector {
+public class MyDeferredImportSelector implements DeferredImportSelector {
 
     @Override
     public String[] selectImports(AnnotationMetadata importingClassMetadata) {
-        return new String[]{MyBeanC.class.getName()};
+        return new String[]{MyBeanB.class.getName()};
     }
 }

spring-annotation-import/src/main/java/com/xcs/spring/config/MyImportBeanDefinitionRegistrar.java

@@ -1,6 +1,6 @@
 package com.xcs.spring.config;
 
-import com.xcs.spring.bean.MyBeanB;
+import com.xcs.spring.bean.MyBeanC;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
@@ -10,10 +10,10 @@ import org.springframework.core.type.AnnotationMetadata;
  * @author xcs
  * @date 2023年08月28日 11时17分
  **/
-public class CustomRegistrar implements ImportBeanDefinitionRegistrar {
+public class MyImportBeanDefinitionRegistrar implements ImportBeanDefinitionRegistrar {
     @Override
     public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
-        RootBeanDefinition beanDefinition = new RootBeanDefinition(MyBeanB.class);
-        registry.registerBeanDefinition("myBeanB", beanDefinition);
+        RootBeanDefinition beanDefinition = new RootBeanDefinition(MyBeanC.class);
+        registry.registerBeanDefinition(MyBeanC.class.getName(), beanDefinition);
     }
 }

spring-annotation-import/src/main/java/com/xcs/spring/config/MyImportSelector.java

@@ -8,7 +8,7 @@ import org.springframework.core.type.AnnotationMetadata;
  * @author xcs
  * @date 2023年08月28日 11时12分
  **/
-public class CustomImportSelector implements ImportSelector {
+public class MyImportSelector implements ImportSelector {
     @Override
     public String[] selectImports(AnnotationMetadata importingClassMetadata) {
         return new String[]{MyBeanA.class.getName()};

spring-annotation-import/src/main/java/com/xcs/spring/config/UserConfig.java

@@ -1,18 +0,0 @@
-package com.xcs.spring.config;
-
-import com.xcs.spring.bean.User;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-/**
- * @author xcs
- * @date 2023年08月28日 10时48分
- **/
-@Configuration
-public class UserConfig {
-
-    @Bean
-    public User user(){
-        return new User("xcs");
-    }
-}

spring-annotation-import/src/main/java/com/xcs/spring/service/MyService.java

@@ -1,20 +0,0 @@
-package com.xcs.spring.service;
-
-import com.xcs.spring.bean.MyBeanD;
-import org.springframework.context.annotation.Bean;
-
-/**
- * @author xcs
- * @date 2023年08月28日 11时00分
- **/
-public class MyService {
-
-    @Bean
-    public MyBeanD myBeanD(){
-        return new MyBeanD();
-    }
-
-    public String getInfo(){
-        return "MyService info";
-    }
-}