I cant replace attributes in sessions
Hi! :)
I need to replace an attribute value in a session, but it seems to become 2 attributes instead.
I need this method to replace or remove a value:
publicvoid changeItemCount(HttpServletRequest request, String nr, String id){
try{
int itemCount = Integer.valueOf(nr).intValue();
if(itemCount == 0){
session.removeAttribute(id);
}else{
session.removeAttribute(id);
session.setAttribute(id, itemCount);
}
}catch (NumberFormatException e){}
}
But removeAttribute does not remove it, and setAttribute instead insersts one more with the same id :(
If i call the method like this: changeItemCount(request, "2", "item1")
and, print all attributes i get:
item:nr:
item11
item11
I want:
item:nr:
item12
Here is all the code (cart.jsp)
<%@ include file="head.jsp" %>
<script language="javascript">
function getInfo(inputId){
var antal = document.getElementById(inputId).value;
window.location ="cart.jsp?update=" + inputId +"&itemNr=" + antal;
}
</script>
<%!
ProductAccessor accessor = ProductAccessorSimulator.Factory.getInstance();
HttpSession session;
%>
<%!
//
publicint getItemCount(HttpServletRequest request, String id){
int itemCount = 0;
try{
itemCount = Integer.valueOf((String)session.getAttribute(id)).intValue();
}catch (NumberFormatException err){}
catch (NullPointerException err){}
catch (ClassCastException err){}
return itemCount;
}
//
publicvoid insertId (HttpServletRequest request, String id){
session = request.getSession();
if(session.getAttribute(id) !=null){
int itemCount = Integer.valueOf((String)session.getAttribute(id)).intValue();
session.removeAttribute(id);// ta bort
session.setAttribute(id,Integer.toString(itemCount+1));
}else{
session.setAttribute(id,"1");
}
}
//
publicvoid changeItemCount(HttpServletRequest request, String nr, String id){
try{
int itemCount = Integer.valueOf(nr).intValue();
if(itemCount == 0){
session.removeAttribute(id);
}else{
session.removeAttribute(id);
session.setAttribute(id, itemCount);
}
}catch (NumberFormatException e){}
}
%>
<%
if(request.getParameter("update") !=null && request.getParameter("itemNr") !=null){
String nr = request.getParameter("itemNr");
String id = request.getParameter("update");
changeItemCount(request, nr, id);
response.sendRedirect("cart.jsp");
}
if(request.getParameter("id") !=null){
String idt = request.getParameter("id");
insertId(request, idt);
response.sendRedirect("cart.jsp");
}
out.println("<table>");
out.println("<tr>");
out.println("<th>Item</th>");
out.println("<th>Nr</th>");
out.println("<th>Refresh</th>");
out.println("<th>Rempve</th>");
out.println("</tr>");
for(Enumeration e = session.getAttributeNames(); e.hasMoreElements() ;){
String str = (String)e.nextElement();
int items = getItemCount(request, str);
try{
Id id = Id.parse(str);
Product p = accessor.getProduct(id);
str = p.getName();
}catch (Exception err){
}
out.println("<tr>");
out.println("<td>" + str +"</td>");
out.println("<td><input id="+str+" type='text' value='"+ items +"' size='1' name='nr'/></td>");
out.print("<td><button onclick=");
out.print("getInfo(");
out.print("'"+str+"'");
out.println(");>Refresh</button></td>");
out.println("<td><button>Remove</button></td>");
out.println("</tr>");
}
out.println("</table>");
%>
<%@ include file="foot.jsp" %>
