Spring constructor based DI

fishercoder1534 · fishercoder1534 · commit cdda6c2b0ca4 · 2016-08-06T10:31:45.000-07:00
diff --git a/SpringTutorials/src/spring_constructor_based_di/MainAppDemoConstructorBasedDI.java b/SpringTutorials/src/spring_constructor_based_di/MainAppDemoConstructorBasedDI.java
@@ -0,0 +1,24 @@
+package spring_constructor_based_di;
+
+/**This one is also working fine. 
+ * But in order to make this one work, I'll have to enable
+ * constructor-based DI in beans.xml and comment out other two DI methods in the TextEditor
+ * and SpellChecker beans.*/
+import org.springframework.context.support.AbstractApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+import common.TextEditor;
+
+public class MainAppDemoConstructorBasedDI {
+    public static void main(String[] args) {
+        AbstractApplicationContext context = new ClassPathXmlApplicationContext(
+                "spring_constructor_based_di/beansForDemoConstructorBasedDI.xml");
+
+        TextEditor te = (TextEditor) context.getBean("textEditor");
+
+        te.spellCheck();
+        context.registerShutdownHook();
+
+        System.out.println("Program ends.");
+    }
+}
diff --git a/SpringTutorials/src/spring_constructor_based_di/beansForDemoConstructorBasedDI.xml b/SpringTutorials/src/spring_constructor_based_di/beansForDemoConstructorBasedDI.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
+
+	<bean id="textEditor" class="common.TextEditor" lazy-init="true">
+		<constructor-arg ref="spellChecker"/><!-- this is constructor based dependency injection -->
+	</bean>
+    <bean id="spellChecker" class="common.SpellChecker" lazy-init="true"></bean>
+
+</beans>
