Section 16.9. WEB-INFclassescomcybertrailsstoretags
16.9 WEB-INF/classes/com/cybertrails/store/tags
This folder contains the custom tags for the application. These tags allow you to add and remove items from the cart, view items in the cart, and calculate the sales tax and the order total. The Checkout custom tag checks to see what step in the checkout process the user is currently in. Possible values are "billing," "shipping," or "confirm." Other steps can be inserted as your application requires. The parameter value is passed from the previous JSP controller.
16.9.1 ProductCartTag.java
/* File: ProductCartTag.java * Purpose: add and remove products from the cart * Notes: if user closes browser, the session is automatically * destroyed. * PRODUCTID attrib is not required because the tag ACTION * defaults to VIEW. */ package com.cybertrails.store.tags; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspTagException; import java.io.IOException; import java.util.*; import com.cybertrails.store.Item; public class ProductCartTag extends TagSupport { private String action=""; private String productid=""; private String productName=""; private String price=""; public void setAction(String action) { this.action = action; } public String getAction() { return this.action; } public void setProductid(String p) { this.productid = p; } public void setProductName(String n) { this.productName = n; } public void setPrice(String price) { this.price = price; } // everything happens here public int doStartTag() throws JspException { try { // get out writer JspWriter out = pageContext.getOut(); // get session HttpSession session = pageContext.getSession(); ArrayList currentItems = (ArrayList)session.getAttribute("currentItems"); if (currentItems == null) { currentItems = new ArrayList(); session.setAttribute("currentItems", currentItems); session.setAttribute("price", price); } if (getAction() == "add") { String productid = pageContext.getRequest().getParameter("productid"); String productName = pageContext.getRequest().getParameter("productName"); String price = pageContext.getRequest().getParameter("price"); String qty = pageContext.getRequest().getParameter("quantity"); ArrayList options = new ArrayList(); ArrayList priceAdds = new ArrayList(); ArrayList optionIDs = new ArrayList(); StringTokenizer token; StringTokenizer optionsToken; Enumeration e = pageContext.getRequest().getParameterNames(); while (e.hasMoreElements()) { String optionSet = e.nextElement().toString(); token = new StringTokenizer(optionSet, ""); String testAgainst = token.nextToken(); if(testAgainst.equalsIgnoreCase("oset")) { optionsToken = new StringTokenizer(pageContext.getRequest().getParameter (optionSet), ""); options.add(optionsToken.nextToken()); priceAdds.add(optionsToken.nextToken()); optionIDs.add(optionsToken.nextToken()); } } if (productid !=null) { Item myItem = new Item(productid, productName, options, priceAdds, optionIDs, qty, price); currentItems.add(myItem); } } // end "add" action else if (getAction() == "remove") { String itemToRemove = pageContext.getRequest().getParameter("position"); // get an iterator Iterator it = currentItems.iterator(); // loop over collection to find // this productid for (int i = 0; i < currentItems.size(); i++) { out.println("itemToRemove: " + itemToRemove); out.println("i: " + i); if (i == Integer.parseInt(itemToRemove)) {currentItems.remove(i); } } } // end "remove" action else if (getAction()=="view") { out.print("VIEW ITEMS IN CART:<br>"); // No items in cart if (currentItems.size() == 0) { out.println("There are no items in your cart."); } // loop over cart and show each item else { int counter = 0; for(int i = 0 ; i < currentItems.size(); i++) { Item Temp = (Item)currentItems.get(i); out.println(Temp.toString()); out.println("<br> <a href=\"doCart.jsp?action=remove&position=" + counter + "\">remove item</a><br>"); counter++; } } } // end "view" action } catch(IOException ioe) { throw new JspException(); } return SKIP_BODY; } } 16.9.2 ViewCartTag.java
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[View full width]/* * File: ViewCartTag * Purpose: custom tag to display items in shopping cart. * Authors: Eben Hewitt, Vic Miller, * June 28 02 */ package com.cybertrails.store.tags; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspTagException; import java.io.IOException; import java.text.*; import java.util.*; import com.cybertrails.store.Item; import java.sql.*; public class ViewCartTag extends TagSupport { public int doStartTag() throws JspException { try{ // make it easier to call a writer JspWriter out = pageContext.getOut(); // get session HttpSession session = pageContext.getSession(); ArrayList currentItems = (ArrayList)session.getAttribute("currentItems"); // there are no items in cart if (currentItems == null currentItems.size() == 0 ) { out.println("<h1>There are no items in your cart.</h1>"); } // display headers for cart. // then loop over cart and show each item else { out.println("<table width=\"450\" cellspacing=\"2\" cellpadding=\"1\" border=\"0\">"); out.println("<tr><td bgcolor=\"#CC0000\" align=\"center\" class=\"cartHeaders\
16.9.3 CheckoutTag.java
/* * File: CheckoutTag.java * Purpose: do the work for each step in the checkout process. */ package com.cybertrails.store.tags; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspTagException; import java.io.IOException; import com.cybertrails.store.Order; import java.util.*; public class CheckoutTag extends TagSupport { //action is "billing" (step one) or // "shipping" (optional step two) or // "confirm" (final step three) private String action; //Shorten the pagecontext request parameter retrieval method protected javax.servlet.ServletRequest request; public void setAction(String action) { this.action = action; } public String getAction() { return this.action; } // tag execution starts here public int doStartTag() throws JspException { try { // get out writer JspWriter out = pageContext.getOut(); //get the session from the calling page HttpSession session = pageContext.getSession(); //get the request from the calling page request = pageContext.getRequest(); if (getAction() == "billing") { //BILLING: set request attribs into session //Billing Name String bName = request.getParameter("bName"); session.setAttribute("bName", bName); //Billing Address String bAddress = request.getParameter("bAddress"); session.setAttribute("bAddress", bAddress); //City String bCity = request.getParameter("bCity"); session.setAttribute("bCity", bCity); //State String bState = request.getParameter("bState"); session.setAttribute("bState", bState); //Zip Code String bZipCode = request.getParameter("bZipCode"); session.setAttribute("bZipCode", bZipCode); //Country String bCountry = request.getParameter("bCountry"); session.setAttribute("bCountry", bCountry); //Phone String bPhone = request.getParameter("bPhone"); session.setAttribute("bPhone", bPhone); //E-Mail String bEmail = request.getParameter("bEmail"); session.setAttribute("bEmail", bEmail); } else if (getAction() == "shipping") { // SHIPPING //Ship Name String sName = request.getParameter("sName"); session.setAttribute("sName", sName); //Ship Address String sAddress = request.getParameter("sAddress"); session.setAttribute("sAddress", sAddress); //Ship city String sCity = request.getParameter("sCity"); session.setAttribute("sCity", sCity); //Ship State String sState = request.getParameter("sState"); session.setAttribute("sState", sState); //Ship Zip Code String sZipCode = request.getParameter("sZipCode"); session.setAttribute("sZipCode", sZipCode); //Ship Country String sCountry = request.getParameter("sCountry"); session.setAttribute("sCountry", sCountry); // Ship Phone String sPhone = request.getParameter("sPhone"); session.setAttribute("sPhone", sPhone); //E-Mail String sEmail = request.getParameter("sEmail"); session.setAttribute("sEmail", sEmail); //ShippingMethod String ShippingMethod = request.getParameter("ShippingMethod"); session.setAttribute("ShippingMethod", ShippingMethod); } // end else else if (getAction() == "placeOrder") { //Set the credit card info into the session scope session.setAttribute("creditname", request.getParameter("ccName")); session.setAttribute("creditnumber", request.getParameter("ccNumber")); session.setAttribute("creditexpdate", request.getParameter("ccExpirationDate")); Order order = new Order(session); order.connect(); order.dbController(); order.disconnect(); } } catch(IOException ioe) { System.err.println("IOE: " + ioe.getMessage()); } catch(Exception e) { System.err.println("E: " + e.toString()); e.printStackTrace(); } return SKIP_BODY; } } 16.9.4 CalculateCartTag.java
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[View full width]/* * File: ViewCartTag * Purpose: custom tag to calculate sales tax, total. * Authors: eben.hewitt, vic.miller */ package com.cybertrails.store.tags; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.TagSupport; import javax.servlet.jsp.JspException; import javax.servlet.jsp.JspTagException; import java.io.IOException; import java.text.*; import java.util.*; import java.sql.*; public class CalculateCartTag extends TagSupport { // what action to perform // possible values are item = "tax" // or item = "total" private String item; // variables to use in calculations double total; double s; double tax; public void setItem(String item) { this.item = item; } public String getItem() { return this.item; } public void setTax(double tax) { this.tax = tax; } public double getTax() { return this.tax; } public int doStartTag() throws JspException { try{ // get a formatter object to format the tax DecimalFormat formatter = new DecimalFormat("0.00;-0.00"); // get session HttpSession session = pageContext.getSession(); // get request ServletRequest request = pageContext.getRequest(); // make it easier to call a writer JspWriter out = pageContext.getOut(); ArrayList currentItems = (ArrayList)session.getAttribute("currentItems"); // change this depending on your state if (session.getAttribute("bState").toString().equals("AZ")){ s = Double.parseDouble(session.getAttribute("subTotal").toString()); double taxRate = 0.085; setTax(s * taxRate); } else { setTax(0.00); } // there are no items in cart if (getItem() == "tax") { out.println(formatter.format(getTax())); } else if (getItem() == "total") { double subTotal = Double.parseDouble(session.getAttribute("subTotal").
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Java for ColdFusion Developers
ISBN: 0130461806
EAN: 2147483647
EAN: 2147483647
Year: 2005
Pages: 206
Pages: 206
Authors: Eben Hewitt