shoppingcartupdate.jsp

来自「实现一个网络购物」· JSP 代码 · 共 68 行

<%

if(actionId.equals("fast")||actionId.equals("order")||actionId.equals("delete")||postingStr!=null) {
    TreeMap products = (TreeMap) session.getAttribute("products"); 
    if(products==null) {
        products = new TreeMap();
        try { session.setAttribute("products",products);
        } catch(Exception e) { } 
    }
    if((actionId.equals("order")||actionId.equals("fast"))&&(products.get(productId)==null)) { // *** add the product ***
        products.put(productId,"1");
    } else if(!postingStr.equals("")) { // *** update shoppingcart ***
        postingStr += "|";
        if(postingStr.indexOf("|valP")>-1) { // *** update the products in the session ***
            int qpos = postingStr.indexOf("|valP");
            while(qpos>-1) {
                int vstart = postingStr.indexOf("=",qpos);
                String product = postingStr.substring(qpos+5,vstart);
                int vend = postingStr.indexOf("|",vstart+1);
                try {
                    String value = "" + Integer.parseInt(postingStr.substring(vstart+1,vend));
                    products.put(product,value);
                } catch(Exception e) { } 
                qpos = postingStr.indexOf("|valP",vend);
            }
        }
        String memberId = getResponseVal("valM",postingStr);
        if(!memberId.equals("")) { // *** add the memberid to the session ***
            try { session.setAttribute("memberid",memberId);
            } catch(Exception e) { } 
        }
        String donationStr = getResponseVal("valD",postingStr); 
        if(!donationStr.equals("")) { // *** add the donation to the session ***
            donationStr = donationStr.replace(',','.');
            if(donationStr.indexOf(".")==-1) donationStr += ".00";
            try {
                donationStr = "" + (new Double(100*Double.parseDouble(donationStr))).intValue();
                session.setAttribute("donation",donationStr);
            } catch(Exception e) { } 
        }
        int qpos = postingStr.indexOf("|q");
        while(qpos>-1) { // *** add the answers the session *** 
            int vstart = postingStr.indexOf("=",qpos);
            String question = postingStr.substring(qpos+2,vstart);
            int vend = postingStr.indexOf("|",vstart+1);
            String answer = postingStr.substring(vstart+1,vend);
            if(answer!=null){ 
                session.setAttribute("q"+ question,answer);
            }
            qpos = postingStr.indexOf("|q",vend);
        }
        if(actionId.equals("delete")) { // *** delete the product ***
            products.remove(productId);
        }
    }
    // *** count number of items ***
    TreeMap productsIterator = (TreeMap) products.clone();
    int totalItems = 0;
    while(productsIterator.size()>0) { 
            String thisProduct = (String) productsIterator.firstKey();
            totalItems += Integer.parseInt((String) productsIterator.get(thisProduct));
            productsIterator.remove(thisProduct);
    }
    totalitemsId = "" + totalItems;
    try { session.setAttribute("totalitems",totalitemsId);
    } catch(Exception e) { } 
}
%>