struts2 - spring problem

[khaled hanafy]

I am trying to integrate struts2 and spring but the spring doesn't inject the beans when required "it gives null pointer".

my applicationContext.xml as follow

<?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.xsd">
		
	<bean id="td" class="com.sook.test.dao.TestDao"/>
	
	<bean name="mine" class="com.sook.test.bao.TestBao">
		<property name="td" ref="td"/>	
	</bean>
</beans>

and the TestBao and TestDao classes as follow

public class TestBao implements TestBaoI{

	private TestDaoI td;

	public void testMethod() {
		// TODO Auto-generated method stub
		td.testDao(); //--------------------------------------->this line give null pointer exception that means the spring doesn't inject the bean 
	}
	public TestDaoI getTd() {
		return td;
	}
	public void setTd(TestDaoI td) {
		this.td = td;
	}
	
}
---------------------------------------------------------------
public class TestDao implements TestDaoI{

	public void testDao() {
		// TODO Auto-generated method stub
		System.out.println("in dao .. test finished successfully");

	}

}

and the tomcat server gives that in the console which mean the spring runs properly

INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1dafbaf: defining beans [td,mine]; root of factory hierarchy

any idea ..