struts2中怎么我压入值栈中的list显示为空?
action方法:
public String input_ui(){
empRegDao emp=new empRegDao();
List<Department> department=emp.getDepartment();
System.out.println("department:"+department);//能打印出来数据
//Department d=new Department(10,"ddd");
//ActionContext.getContext().getValueStack().push(d);
ActionContext.getContext().getValueStack().push(department);
return "success";
}
然后我再jsp用<s:debug></s:debug>结果上面显示:
Object Property Name Property Value
java.util.ArrayList empty false
但是注释部分我运行后,在值栈却是有的,这是怎么回事?