遇到一些问题,求解jsp

org.apache.jasper.JasperException: An exception occurred processing JSP page /QueryOrder1.jsp at line 71

68:  
69: <%Cart cart = (Cart)session.getAttribute("cart"); 
70: double totalMoney = 0.0;
71: Iterator it = cart.getItems().iterator();
72: while(it.hasNext()){
73: SalesItem item = (SalesItem)it.next();
74: Product p = item.getProductId();


两台机器 一台能运行成功,另一台出现如上错误,求解

会不会是你这一台机器的jdk版本太低了，lz把这台机器的jdk版本改成跟另一台一样再试试！