通过类名直接获取某个spring对象

@SuppressWarnings("unchecked")
	public static <T> T getBean(String name) {
		return (T) ContextLoader.getCurrentWebApplicationContext()
				.getBean(name);
	}

public static TradeService getDao(){
if(tradeService==null){
tradeService = SpringUtil.getBean("tradeService");
}
return tradeService;
}