How to create multiple objects of same class , with different values , in Spring using xml config file? - spring

Question

appContextXmlAutowiring.xml
<bean id="emp" class="com.org.epam.Assignment.Spring.XmlAutowiring.Employee" >
<property name="name" value ="Vineet"/>
<property name="id" value ="100"/>
<property name="age" value ="28"/>
<property name="addressNew" ref="addressNew"/>
</bean>
<bean id="emp1" class="com.org.epam.Assignment.Spring.XmlAutowiring.Employee">
<property name="name" value ="Ashutosh"/>
<property name="id" value ="200"/>
<property name="age" value ="29"/>
<property name="addressNew" ref="addressNew1"/>
</bean>
<bean id="addressNew1" class="com.org.epam.Assignment.Spring.XmlAutowiring.Address" >
<property name="country" value ="India1"/>
<property name="state" value ="Maharashtra"/>
<property name="city" value ="Pune"/>
</bean>
<bean id="addressNew" class="com.org.epam.Assignment.Spring.XmlAutowiring.Address" >
<property name="country" value ="Ind"/>
<property name="state" value ="Mah"/>
<property name="city" value ="Punite"/>
</bean>
</beans>
Driver Main Class
public class DriverClass {
public static void main(String[] args) {
try{
ApplicationContext ac = new ClassPathXmlApplicationContext("appContextXmlAutowiring.xml");
Employee e = ac.getBean(Employee.class);
System.out.println(e.toString());
//System.out.println(e.getAddressNew().getCity());
}
catch (Exception e) {
e.printStackTrace();
}
}
}
Error Message
org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.org.epam.Assignment.Spring.XmlAutowiring.Employee' available: expected single matching bean but found 2: emp,emp1
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1041)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:345)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:340)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1092)
at com.org.epam.Assignment.Spring.XmlAutowiring.DriverClass.main(DriverClass.java:12)
I am getting mentioned error when trying to create two different objects of same type i.e. Employee using Spring Application context.
Could anyone please help me in solving this error.
Also please mention how to create multiple objects of same class , with different values , in Spring using xml config file ?
Thanks

Answer 1

You are creating two beans with the same class and then retrieve the bean by class. The error says it doesn't know which bean to choose.
You should use the
applicationContext.getBean(name)
method instead

Answer 2

Your code is already creating multiple beans of same class as you defined in your xml config. That is not where the code is failing it is failing while retrieving the Employee bean from the application context. The reason behind this failure is pretty clear in the error message;
org.springframework.beans.factory.NoUniqueBeanDefinitionException: No
qualifying bean of type
'com.org.epam.Assignment.Spring.XmlAutowiring.Employee' available:
expected single matching bean but found 2: emp,emp1
You need to retrieve the bean by its name in such situation as below;
Employee e = (Employee) ac.getBean("emp");
Employee e1 = (Employee) ac.getBean("emp1");