Spring注解开发（用于改变作用范围）

@Scope：用于指定作用范围

作用：用于指定bean的作用范围
位置：放在实体类上
value：指定范围的取值
常用取值：singleton（单例）和 prototype（多例）

@Scope(“prototype”)

@Component(value="accountService")
@Scope("prototype")
public class AccountServiceImpl implements AccountService{
    @Resource(name = "accountDao2")
    private AccountDao accountDao;

    public void saveAccount() {
        accountDao.saveAccount();
    }
}

public class Client {
    public static void main(String[] args) {
        ApplicationContext context =
                new ClassPathXmlApplicationContext("bean.xml");
        AccountService service =
                context.getBean("accountService", AccountService.class);
        AccountService service1 =
        context.getBean("accountService", AccountService.class);
        
        System.out.println(service==service1);//false
    }
}