Simple Spring Sample

testSpringBean.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.xsd">

  <bean id="cataction" class="com.test.CatAction">
  </bean>
</beans>

testClient

...
public static void setUpBeforeClass() throws Exception {
    BeanFactory factory = new ClassPathXmlApplicationContext(
            "testSpringBean.xml");
    CatAction catAction = factory.getBean("cataction", CatAction.class);

    System.out.println(catAction.SayHello("koma"));
}
...

CatAction.java

package com.test;
public class CatAction {
    public String SayHello(String name)
    {
        return "Helo " + name;
    }
}

WebApplicationContext
web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app id="WebApp_ID">
  <display-name>testSpringWeb</display-name>

  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/testSpringBean.xml</param-value>
  </context-param>

  <listener>
    <listener-class>com.test.StartListener</listener-class>
  </listener>
</web-app>

StartListener.java

package com.test;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.ContextLoaderListener;

public class StartListener extends ContextLoaderListener {
    public StartListener() {
    }
    public void contextInitialized(ServletContextEvent event) {
        ServletContext servletContext = event.getServletContext();
        super.contextInitialized(event);
        WebApplicationContext webContext = (WebApplicationContext) servletContext
                .getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
        CatAction catAction = webContext.getBean("cataction", CatAction.class);
        System.out.println(catAction.SayHello("koma"));
    }
    public void contextDestroyed(ServletContextEvent event) {
    }
}