public class PersonServiceBean implements IPersonService {

 public void init(){
  
  System.out.println("我是初始化函数");
 }
 
 public PersonServiceBean(){
  System.out.println("我是构造函数");
 }
 public void Save(){
  System.out.println("save方法");
 }
 
 public void cleanup(){
  System.out.println("cleanup方法");
 }
}


<bean id="personService"
  class="cn.itcast.service.impl.PersonServiceBean"
   init-method="init" destroy-method="cleanup"/>

@Test public void instanceSpring(){
  ClassPathXmlApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");
  IPersonService ipersonService=(IPersonService)ctx.getBean("personService");
 ctx.close();