spring实例化时

 

public void test2() {
    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    //配置文件中的id属性
    IHelloService service = (IHelloService) context.getBean("helloService");
    service.sayHello();

}

可以将前面用子类来写，并关闭

 

 

               public void test2() {              ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");              //配置文件中的id属性              IHelloService service = (IHelloService) context.getBean("helloService");              service.sayHello();              context.close();          }
public void test2() {
    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
    //配置文件中的id属性
    IHelloService service = (IHelloService) context.getBean("helloService");
    service.sayHello();
    context.close();
}