cds_jsp.java

来自「100多M的J2EE培训内容」· Java 代码 · 共 216 行

JAVA
216 行
字号 
package org.apache.jsp;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import org.apache.jasper.runtime.*;
import shoppingcart.Item;

public class cds_jsp extends HttpJspBase {


  private static java.util.Vector _jspx_includes;

  public java.util.List getIncludes() {
    return _jspx_includes;
  }

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    javax.servlet.jsp.PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;


    try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html;charset=ISO-8859-1");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      			null, true, 8192, true);
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("<HTML>");
      out.write("<HEAD>");
      out.write("<TITLE>Example of Using Session Scope");
      out.write("</TITLE>");
      out.write("</HEAD>");
      out.write("<BODY>\r\n");
      shoppingcart.ShoppingCart shoppingCart = null;
      synchronized (session) {
        shoppingCart = (shoppingcart.ShoppingCart) pageContext.getAttribute("shoppingCart", PageContext.SESSION_SCOPE);
        if (shoppingCart == null){
          try {
            shoppingCart = (shoppingcart.ShoppingCart) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "shoppingcart.ShoppingCart");
          } catch (ClassNotFoundException exc) {
            throw new InstantiationException(exc.getMessage());
          } catch (Exception exc) {
            throw new ServletException("Cannot create bean of class " + "shoppingcart.ShoppingCart", exc);
          }
          pageContext.setAttribute("shoppingCart", shoppingCart, PageContext.SESSION_SCOPE);
        }
      }
      out.write("\r\n");
      out.write("\r\n[ Shop for CDs ] ");
      out.write("<A HREF=\"toys.jsp\">Shop for Toys");
      out.write("</A>\r\n");
      out.write("<H1> Online CD Catalog ");
      out.write("</H1>\r\n");
      out.write("<TABLE>\r\n");
      out.write("<TR>");
      out.write("<TD BGCOLOR=AAAAAA ALIGN=CENTER>Name");
      out.write("</TD>");
      out.write("<TD BGCOLOR=AAAAAA>SKU");
      out.write("</TD>\r\n    ");
      out.write("<TD BGCOLOR=AAAAAA>Decription");
      out.write("</TD>");
      out.write("<TD BGCOLOR=AAAAAA>Price");
      out.write("</TD>\r\n    ");
      out.write("<TD BGCOLOR=AAAAAA>&nbsp;");
      out.write("</TD>");
      out.write("</TR>\r\n");
 String[] names = {"Tchaikovsky","Mendelssohn","Haydn","Schumann","Bach"};
   String[] SKUs  = {"A111","2B22","33C3","444D","E555"};
   double[] prices = {12.00, 23.50, 34.00, 45.50, 56.00};
   int Quantity=1;
   for(int j=0; j<names.length; j++){ 
      out.write("\r\n     ");
      out.write("<TR>");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(names[j]);
      out.write("  ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(SKUs[j]);
      out.write("   ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>Music CD       ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(Quantity);
      out.write("   ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(prices[j]);
      out.write("0");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>\r\n             ");
      out.write("<A HREF=\"cds.jsp?name=");
      out.print(names[j]);
      out.write("&sku=");
      out.print(SKUs[j]);
      out.write("&quantity=");
      out.print(Quantity);
      out.write("&price=");
      out.print(prices[j]);
      out.write("\">\r\n              Add");
      out.write("</A>");
      out.write("</TD>");
      out.write("</TR>\r\n");
 } 
      out.write("\r\n");
      out.write("</TABLE>\r\n");
      out.write("<A HREF=cds.jsp?name=emptyCart>Empty Shopping Cart");
      out.write("</A>\r\n");
      out.write("<HR>\r\n");
      out.write("<H1> Content of Shopping Cart ");
      out.write("</H1>\r\n");
 String name = request.getParameter("name");
   if(name!=null){
     if(name.equals("emptyCart")){
       shoppingCart.emptyCart();
     } else if(name.equals("deleteItem")) {
       String sku = request.getParameter("sku");
       shoppingCart.deleteItem(sku);
     } else {
       String sku = request.getParameter("sku");
       double price = Double.parseDouble(request.getParameter("price"));
       int quantity=1;
       Item newItem = new Item(sku, name, "Music CD",quantity,price);
       shoppingCart.addItem(newItem);
   }} 
      out.write("\r\n");
      out.write("<TABLE>\r\n");
      out.write("<TR>");
      out.write("<TD BGCOLOR=AAAAAA ALIGN=CENTER>Name");
      out.write("</TD>");
      out.write("<TD BGCOLOR=AAAAAA>SKU");
      out.write("</TD>\r\n    ");
      out.write("<TD BGCOLOR=AAAAAA>Decription");
      out.write("</TD>\r\n    ");
      out.write("<TD BGCOLOR=AAAAAA>Quantity");
      out.write("</TD>\r\n    ");
      out.write("<TD BGCOLOR=AAAAAA ALIGN=CENTER>Price");
      out.write("</TD>");
      out.write("<TD BGCOLOR=AAAAAA>&nbsp;");
      out.write("</TD>\r\n    ");
      out.write("</TR>\r\n");
 java.util.Enumeration items = shoppingCart.getItems();
   while(items.hasMoreElements()){
     Item item = (Item)items.nextElement(); 
      out.write("\r\n     ");
      out.write("<TR>");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(item.getName());
      out.write("              ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(item.getSku());
      out.write("               ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(item.getDescription());
      out.write("       ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>");
      out.print(item.getQuantity());
      out.write("          ");
      out.write("</TD>\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD ALIGN=RIGHT>");
      out.print(item.getPrice());
      out.write("0");
      out.write("</TD>\r\n\r\n         ");
      out.write("<TD BGCOLOR=DDDDDD>\r\n             ");
      out.write("<A HREF=\"cds.jsp?name=deleteItem&sku=");
      out.print(item.getSku());
      out.write("\">\r\n             Remove");
      out.write("</A>");
      out.write("</TD>\r\n");
 }
   double total = shoppingCart.computeTotal(); 
      out.write("\r\n     ");
      out.write("<TR>");
      out.write("<TD>&nbsp;");
      out.write("</TD>");
      out.write("<TD>&nbsp;");
      out.write("</TD>");
      out.write("<TD BGCOLOR=\"DDDDDD\">Total");
      out.write("</TD>\r\n     ");
      out.write("<TD BGCOLOR=DDDDDD ALIGN=RIGHT>");
      out.print(shoppingCart.computeTotal());
      out.write("0\r\n     ");
      out.write("</TD>");
      out.write("</TR>\r\n");
      out.write("</TABLE>");
      out.write("</BODY>");
      out.write("</HTML>");
    } catch (Throwable t) {
      out = _jspx_out;
      if (out != null && out.getBufferSize() != 0)
        out.clearBuffer();
      if (pageContext != null) pageContext.handlePageException(t);
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(pageContext);
    }
  }
}

cds_jsp.java - 源码说明

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