java.lang.NoSuchMethodException: com.opensymphony.xwork2.
问题

http://www.xxx.com:8081/paymoney/alipayPayMoneyReturn!alipayReturn.action

http://www.xxx.com:8081/paymoney/alipay_pay_money_return!alipayReturn.action

struts2,中不支持大写,需要加下划线才行.