DataSupport.order 里变量名要与类里面的大小写保持一致，如submitTime 不能写为 submittime

//暂时只导航到最新的那一个，后续再加判断
List<ender> enderList = DataSupport.where("state = ?", "3").order("submitTime desc").find(ender.class);
if(enderList != null && enderList.size() > 0){
ender = new ender();
ender = enderList.get(0);
}