@PostConstruct 和 @PreDestory的应用

依然直接上代码，代码才是王道！！！

App.java

package com.mkyong.common;

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

import com.mkyong.customer.services.CustomerService;

public class App 
{
    public static void main( String[] args )
    {
    	ConfigurableApplicationContext context = 
    		new ClassPathXmlApplicationContext(new String[] {"Spring-Customer.xml"});
	
    	CustomerService cust = (CustomerService)context.getBean("customerService");
    	
    	System.out.println(cust);
    	
    	context.close();
    }
}

CustomerService.java

package com.mkyong.customer.services;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

public class CustomerService
{
	String message;
	
	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}
	
	@PostConstruct
	public void initIt() throws Exception {
		System.out.println("Init method after properties are set : " + message);
	}
	
	@PreDestroy
	public void cleanUp() throws Exception {
		System.out.println("Spring Container is destroy! Customer clean up");
	}
	
}

Spring-Customer.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">

   <context:annotation-config />

   <bean id="customerService" class="com.mkyong.customer.services.CustomerService">
   		<property name="message" value="i'm property message" />
   </bean>
		
</beans>

AppTest.java

package com.mkyong.common;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
 * Unit test for simple App.
 */
public class AppTest 
    extends TestCase
{
    /**
     * Create the test case
     *
     * @param testName name of the test case
     */
    public AppTest( String testName )
    {
        super( testName );
    }

    /**
     * @return the suite of tests being tested
     */
    public static Test suite()
    {
        return new TestSuite( AppTest.class );
    }

    /**
     * Rigourous Test :-)
     */
    public void testApp()
    {
        assertTrue( true );
    }
}