learn/spring: autowire in spring using xml

comeonkillthecode · comeonkillthecode · commit fe2d5907d99d · 2024-11-03T17:08:59.000+05:30
diff --git a/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/App.java b/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/App.java
@@ -12,8 +12,8 @@ public static void main(String[] args) {
         System.out.println("In main method");
         System.out.println(Arrays.toString(names));
 
-        Dev obj = (Dev) context.getBean("dev");
-        System.out.println(obj.getAge());
+        Dev obj = context.getBean(Dev.class);
+//        System.out.println(obj.getAge());
         obj.learn();
     }
 }
diff --git a/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Computer.java b/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Computer.java
@@ -0,0 +1,5 @@
+package org.akash.learn.spring;
+
+public interface Computer {
+    void compile();
+}
diff --git a/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Desktop.java b/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Desktop.java
@@ -0,0 +1,8 @@
+package org.akash.learn.spring;
+
+public class Desktop implements Computer {
+    @Override
+    public void compile(){
+        System.out.println("Compiling in Desktop");
+    }
+}
diff --git a/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Dev.java b/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Dev.java
@@ -1,40 +1,38 @@
 package org.akash.learn.spring;
 
-import org.springframework.stereotype.Component;
-
 public class Dev
 {
-    private Laptop laptop;
-    private int age;
+    private Computer computer;
+//    private int age;
 
 //    public Dev(int age) {
 //        this.age = age;
 //    }
 
 
-    public Dev(int age, Laptop laptop) {
-        this.age = age;
-        this.laptop = laptop;
-    }
-
-    public Laptop getLaptop() {
-        return laptop;
-    }
+//    public Dev(int age, Laptop laptop) {
+//        this.age = age;
+//        this.laptop = laptop;
+//    }
 
-    public void setLaptop(Laptop laptop) {
-        this.laptop = laptop;
+    public Computer getComputer() {
+        return computer;
     }
 
-    public int getAge() {
-        return age;
+    public void setComputer(Computer computer) {
+        this.computer = computer;
     }
 
-    public void setAge(int age) {
-        this.age = age;
-    }
+//    public int getAge() {
+//        return age;
+//    }
+//
+//    public void setAge(int age) {
+//        this.age = age;
+//    }
 
     public void learn(){
         System.out.println("Learning Spring Boot");
-        laptop.compile();
+        computer.compile();
     }
 }
diff --git a/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Laptop.java b/telusko/Spring/third-spring-frmaework/src/main/java/org/akash/learn/spring/Laptop.java
@@ -1,7 +1,8 @@
 package org.akash.learn.spring;
 
-public class Laptop {
+public class Laptop implements Computer {
+    @Override
     public void compile(){
-        System.out.println("Compiling.........");
+        System.out.println("Compiling in Laptop");
     }
 }
diff --git a/telusko/Spring/third-spring-frmaework/src/main/resources/spring.xml b/telusko/Spring/third-spring-frmaework/src/main/resources/spring.xml
@@ -3,15 +3,18 @@
        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.xsd">
-    <bean id="dev" class="org.akash.learn.spring.Dev">
+    <bean id="dev" class="org.akash.learn.spring.Dev" autowire="byType" >
 <!--        setter injection-->
 <!--        <property name="age" value="12"/>-->
 <!--        constructor injection-->
 <!--        <constructor-arg value="14"/>-->
 <!--        <property name="laptop" ref="laptop"/>-->
-        <constructor-arg index="0" value="12"/>
-        <constructor-arg index="1" ref="laptop"/>
+<!--        <constructor-arg index="0" value="12"/>-->
+<!--        <constructor-arg index="1" ref="laptop"/>-->
+<!--        <property name="computer" ref="desktop" />-->
     </bean>
-    <bean id="laptop" class="org.akash.learn.spring.Laptop">
+    <bean id="laptop" class="org.akash.learn.spring.Laptop" primary="true">
+    </bean>
+    <bean id="desktop" class="org.akash.learn.spring.Desktop">
     </bean>
 </beans>

Original file line number	Diff line number	Diff line change
`@@ -12,8 +12,8 @@ public static void main(String[] args) {`
`12`	`12`	`System.out.println("In main method");`
`13`	`13`	`System.out.println(Arrays.toString(names));`
`14`	`14`
`15`		`- Dev obj = (Dev) context.getBean("dev");`
`16`		`- System.out.println(obj.getAge());`
	`15`	`+ Dev obj = context.getBean(Dev.class);`
	`16`	`+// System.out.println(obj.getAge());`
`17`	`17`	`obj.learn();`
`18`	`18`	`}`
`19`	`19`	`}`
Original file line number	Diff line number	Diff line change
`@@ -1,7 +1,8 @@`
`1`	`1`	`package org.akash.learn.spring;`
`2`	`2`
`3`		`-public class Laptop {`
	`3`	`+public class Laptop implements Computer {`
	`4`	`+ @Override`
`4`	`5`	`public void compile(){`
`5`		`- System.out.println("Compiling.........");`
	`6`	`+ System.out.println("Compiling in Laptop");`
`6`	`7`	`}`
`7`	`8`	`}`