addtocartnew.java

这是一个网上书站的例子

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.zxf.struts.cart;

import java.io.IOException;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.cart.Book;
import com.cart.Cart;
import com.db.Jdo;

/** 
 * MyEclipse Struts
 * Creation date: 01-10-2008
 * 
 * XDoclet definition:
 * @struts.action validate="true"
 */
public class addToCartNew extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub
		HttpSession session=request.getSession();
		String uservalidate=(String)session.getAttribute("uservalidate");
		System.out.print(uservalidate);
		if(uservalidate==null)
		{
		
			return mapping.findForward("login");
			
		}
		else
		{
			System.out.println("zxf11");
			Cart cart=(Cart)session.getAttribute("cart");
			String bookid=request.getParameter("id");
			Book book=new Book();
			Jdo jdo=new Jdo();
			ResultSet rs=jdo.executeQuery("select * from book where bookid="+bookid);
			try {
				rs.next();
				book.setAgio(rs.getFloat("bookagio"));
				book.setBookid(Integer.parseInt(bookid));
					book.setBookname(rs.getString("bookname"));
					book.setPrice(rs.getFloat("bookprice"));
				jdo.destroy();
				cart.add(bookid, book, 1);
				
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			try {
				response.sendRedirect("mycart.jsp");
				
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return null;
			
		}
	}
		
		
		
		
		
		
	}