//提交后转入SERVLET
String shangp=request.getParameter("shangp");
String price=request.getParameter("price");
ArrayList <Shop_items> list=new ArrayList <Shop_items>();
Shop_items shitem=new Shop_items();
shitem.setShangp(shangp);
shitem.setPrice(price);
if(list.isEmpty()==true){
list.add(shitem); }else{
list.addAll(list);
} if(list==null||list.size() <=0){
response.sendRedirect("../fun/image_info.jsp");
}else{ HttpSession session=request.getSession();
session.setAttribute("list", list);
response.sendRedirect("../fun/shopping.jsp"); }
//JSP取出,取出来只有一个,是不是放入SESSION的问题,请高手指点下
<%
try{
ArrayList <Shop_items> list2=new ArrayList <Shop_items>();
list2=(ArrayList)session.getAttribute("list"); if(list2!=null){
for(int i=0;i <list2.size();i++){
%>
<TR>
<td align="center"> <%=list2.get(i).getShangp()%> </td> <td > <%=list2.get(i).getPrice()%> </td>
</TR>
<%} }}catch(Exception e){}%>
String shangp=request.getParameter("shangp");
String price=request.getParameter("price");
ArrayList <Shop_items> list=new ArrayList <Shop_items>();
Shop_items shitem=new Shop_items();
shitem.setShangp(shangp);
shitem.setPrice(price);
if(list.isEmpty()==true){
list.add(shitem); }else{
list.addAll(list);
} if(list==null||list.size() <=0){
response.sendRedirect("../fun/image_info.jsp");
}else{ HttpSession session=request.getSession();
session.setAttribute("list", list);
response.sendRedirect("../fun/shopping.jsp"); }
//JSP取出,取出来只有一个,是不是放入SESSION的问题,请高手指点下
<%
try{
ArrayList <Shop_items> list2=new ArrayList <Shop_items>();
list2=(ArrayList)session.getAttribute("list"); if(list2!=null){
for(int i=0;i <list2.size();i++){
%>
<TR>
<td align="center"> <%=list2.get(i).getShangp()%> </td> <td > <%=list2.get(i).getPrice()%> </td>
</TR>
<%} }}catch(Exception e){}%>
list.add(shitem); }else{
list.addAll(list);
} ??
你这当然list里永远只有一个元素了???
你new 的list,if(list.isEmpty()==true这个条件当然成立了...你应该从session里获得list再往里边加元素
if(null == list)
list=new ArrayList <Shop_items>();