Spring Java annotation based DI

fishercoder1534 · fishercoder1534 · commit 08765160bf2d · 2016-08-06T10:35:08.000-07:00
diff --git a/SpringTutorials/src/spring_java_annotation_based_di/Gospel1Config.java b/SpringTutorials/src/spring_java_annotation_based_di/Gospel1Config.java
@@ -0,0 +1,16 @@
+package spring_java_annotation_based_di;
+
+import org.springframework.beans.factory.annotation.Configurable;
+import org.springframework.context.annotation.Bean;
+
+import common.Gospel1;
+
+@Configurable
+public class Gospel1Config {
+
+    @Bean
+    public Gospel1 gospel1() {
+        System.out.println("Gospel1Config.java is getting called now.");
+        return new Gospel1();
+    }
+}
diff --git a/SpringTutorials/src/spring_java_annotation_based_di/HelloWorldConfig.java b/SpringTutorials/src/spring_java_annotation_based_di/HelloWorldConfig.java
@@ -0,0 +1,21 @@
+package spring_java_annotation_based_di;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import common.HelloWorld;
+
+/**
+ * This is to demo java-annotation-based Spring configuration/dependency
+ * Injection.
+ */
+
+@Configuration
+public class HelloWorldConfig {
+
+    @Bean
+    public HelloWorld helloWorld() {
+        System.out.println("HelloWorldConfig.java is getting called now.");
+        return new HelloWorld();
+    }
+}
diff --git a/SpringTutorials/src/spring_java_annotation_based_di/MainAppForDemoJavaAnnotationBasedDI.java b/SpringTutorials/src/spring_java_annotation_based_di/MainAppForDemoJavaAnnotationBasedDI.java
@@ -0,0 +1,34 @@
+package spring_java_annotation_based_di;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+import common.Gospel1;
+import common.HelloWorld;
+import common.TextEditor;
+
+/**
+ * This is to demo java-annotation-based Spring configuration/dependency
+ * Injection.
+ */
+public class MainAppForDemoJavaAnnotationBasedDI {
+
+    public static void main(String[] args) {
+        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+
+        ctx.register(Gospel1Config.class, TextEditorConfig.class,
+                HelloWorldConfig.class);
+        ctx.refresh();
+
+        Gospel1 luke = ctx.getBean(Gospel1.class);
+        luke.setReflection("Gospel 1 is the book of Luke!");
+        System.out.println(luke.getReflection());
+
+        TextEditor te = ctx.getBean(TextEditor.class);
+        te.spellCheck();
+
+        HelloWorld hw = ctx.getBean(HelloWorld.class);
+
+        System.out.println("The program ends!");
+    }
+
+}
diff --git a/SpringTutorials/src/spring_java_annotation_based_di/TextEditorConfig.java b/SpringTutorials/src/spring_java_annotation_based_di/TextEditorConfig.java
@@ -0,0 +1,30 @@
+package spring_java_annotation_based_di;
+
+import org.springframework.beans.factory.annotation.Configurable;
+import org.springframework.context.annotation.Bean;
+
+import common.SpellChecker;
+import common.TextEditor;
+
+@Configurable
+public class TextEditorConfig {
+
+    // @Bean
+    // public TextEditor textEditor() {
+    // return new TextEditor();
+    // }
+
+    @Bean
+    public TextEditor textEditor() {
+        System.out
+                .println("TextEditorConfig.java is getting called now and it's inside textEditor() method now.");
+        return new TextEditor(spellChecker());
+    }
+
+    @Bean
+    public SpellChecker spellChecker() {
+        System.out
+                .println("TextEditorConfig.java is getting called now and it's inside spellChecker() method now.");
+        return new SpellChecker();
+    }
+}
