让spring自动扫描管理bean

@Service("f")
public class PersonserviceBean implements Personservice {
private String name1;
@Resource private PersonDao personDao;

public PersonserviceBean() {
}
@PostConstruct
public void init(){
System.out.println("初始化方法用注释的方式调用：@PostConstruct");
}

@PreDestroy
public void destroy(){
System.out.println("销毁方法，用注释的方式调用：@PreDestroy");
}