调用类的get方法报空指针异常
try {
if(studentInfo.getMemberInfo().getListenCourseCardCount()>0)
{
memberInfoDAO.update("update MemberInfo set listenCourseCardCount=listenCourseCardCount-1 where memberId=?",new Object[]{studentInfo.getMemberInfo().getMemberId()});
}
memberInfoDAO.update("update MemberInfo set listenCourseCardCountUsed=listenCourseCardCountUsed+1 where memberId=?",new Object[]{studentInfo.getMemberInfo().getMemberId()});
} catch (Exception e) {System.out.println("改变听课证数量错误");}
下面这句 包空指针
if(studentInfo.getMemberInfo().getListenCourseCardCount()>0)
新手菜鸟 求 大牛们给提示啊!!!!