Spring is powerful framework also called mother of all Framework
First Program in Spring
1. Calulator.java
package com.login;
public class calculator implements operation{
public calculator()
{
System.out.println("Inside the calculator");
}
public int sum()
{
return 4;
}
public int substraction()
{
return 6;
}
}
2. operation.java
package com.login;
public interface operation {
public int sum();
public int substraction();
}
3. TestCal.java
package com.login;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
public class TestCal {
public static void main(String[] args)
{
try{
BeanFactory factory = new XmlBeanFactory(new ClassPathResource("aplication.xml"));
calculator cl=(calculator)factory.getBean("bean1");
int a=0;
a=cl.sum();
System.out.println("The value of sum is "+a);
}
catch(Exception e)
{
System.out.println("The exception is"+e.getMessage());
}
}
}
Outpt:
After the run this program Output will
Inside the calculator
The value of sum is 4
Here we bean class Calcultor is not directly instantiated , it has done through XMLBeanFactory i.e. configure into
application.xml file, so spring framework says that programmer to concentrate only on bussiness loging not on creation of object
i.e. Spring IOC take responsibility of creation of object
application.xml
<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-2.0.xsd">
<bean id="bean1" class="com.login.calculator"/>
<bean id="audi" class="com.aspec.Audience"/>
</beans>
Import following highlighted jar file in lib directory
