Autowired注解的妙用---在Controller里的構造函數里獲取需要注入的對象

/*@Resource
private Observer<TaxiObserverVo> taxiPushObserver;


@Resource
private Observer<TaxiObserverVo> taxiFlowObserver;



public Pay () {
super();
addObserver(taxiFlowObserver);
addObserver(taxiPushObserver);
}*/

 

@Autowired
public Pay (Observer<TaxiObserverVo> taxiPushObserver,Observer<TaxiObserverVo> taxiFlowObserver) {
addObserver(taxiFlowObserver);
addObserver(taxiPushObserver);
}

當時這么寫 是為了 改變加載順序

PS：Java變量的初始化順序為：靜態變量或靜態語句塊–>實例變量或初始化語句塊–>構造方法–>@Autowired

https://www.cnblogs.com/acm-bingzi/p/springAutowired.html