spring core exp

A.java

package com.jtc.p1;

public class A {
    int a;
    String msg;        //setter injection.
   
    public void setA(int a){            //setter injection
        System.out.println("SetA(int a) setter injection in A class");
        this.a=a;
    }
   
    public void setMsg(String msg){            //setter injection.
        System.out.println("setMsg(String msg) setter injection in B class");
        this.msg=msg;
    }
   
    void showA(){
        System.out.println("showA() method in A");
        System.out.println(a);
        System.out.println(msg);
    }
   
   
}














B.java






package com.jtc.p1;

public class B {
   
    int b;
    String str;            //constructor injection.
   
    public B(int b, String str){        //constructor injection
        System.out.println("B(int b,String str) constructor injection in B class");
        this.b=b;
        this.str=str;
   
    }
   
    void showB(){
        System.out.println("ShowB() method in B class");
        System.out.println(b);
        System.out.println(str);
    }

}



Hello.java





package com.jtc.p1;

public class B {
   
    int b;
    String str;            //constructor injection.
   
    public B(int b, String str){        //constructor injection
        System.out.println("B(int b,String str) constructor injection in B class");
        this.b=b;
        this.str=str;
   
    }
   
    void showB(){
        System.out.println("ShowB() method in B class");
        System.out.println(b);
        System.out.println(str);
    }

}



Jtc.java

package com.jtc.p1;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Jtc {
    public static void main(String[] args) {
        ApplicationContext ctx=new ClassPathXmlApplicationContext("spconfig.xml");
    Hello h1=(Hello)ctx.getBean("hello");
        h1.showHello();
    }
}

Jtc.java /without spring


package com.jtc.p1;

public class Jtc {
public static void main(String[] args) {
    //without ioc.
    A aobj=new A();
    aobj.setA(10);
    aobj.setMsg("Hello A");
   
    B bobj=new B(20,"Hello B");
   
    Hello h1=new Hello(bobj);
    h1.setAobj(aobj);
    h1.showHello();
   
   
}
}


spconfig.xml



<?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="aobj" class="com.jtc.p1.A">
        <property name="a" value="10" />
        <property name="msg" value="A is Property value" />

    </bean>
   
    <bean id="bobjs" class="com.jtc.p1.B">
        <constructor-arg value="20"/>
        <constructor-arg value="B is constructor value"/>
    </bean>
   
    <bean id="hello" class="com.jtc.p1.Hello">
        <property name="aobj" ref="aobj" />
        <constructor-arg ref="bobjs"></constructor-arg>
    </bean>


</beans>