addbasketcontroller.java

一个简单的图书管管理系统~是用java语言编写的

package library;
import java.io.IOException;
import java.util.ArrayList;
import javax.servlet.*;
import javax.servlet.http.*;

public class AddBasketController extends HttpServlet{
     public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         String[] booksInCart = request.getParameterValues("addtocart");
         if(booksInCart==null){
             request.getRequestDispatcher("viewbasket.jsp").forward(request,response);
         }
         else{
      
         LibraryBasket basket= null;
         HttpSession session = request.getSession(true);
         try{ basket=(LibraryBasket)session.getAttribute("basket");
             if(basket==null){
            	 basket = new LibraryBasket();
            	 session.setAttribute("basket",basket);
             }
         }
      catch(Exception exp){
    	  basket=new LibraryBasket();
    	  session.setAttribute("basket",basket);
      }
      
       
         for(int i=0;i<booksInCart.length;i++){
            
             basket.addItem(booksInCart[i]);
          
         }
       
        
         request.getRequestDispatcher("viewbasket.jsp").forward(request,response);
  
         }
 }
}