viewbookaction.java

《精通SOA：基于服务总线的Struts+EJB+Web Service整合应用开发》原书的实例代码

/*
 * $Id: RegistrationAction.java 54929 2004-10-16 16:38:42Z germuska $ 
 *
 * Copyright 2000-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.bkstore.controller.action;

import java.math.BigDecimal;
import java.util.ArrayList;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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 org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.validator.DynaValidatorForm;

import com.bkstore.model.service.dto.BookDTO;
import com.bkstore.model.service.dto.ShoppingCartDTO;
import com.bkstore.model.service.imp.BookStoreMgrImp;

/**
 * Implementation of <strong>Action</strong> that validates a registration form.
 *
 */
public final class ViewBookAction extends Action {

    /**
     * Commons Logging instance.
     */
    private Log log = LogFactory.getFactory().getInstance(this.getClass().getName());

    /**
     * Process the specified HTTP request, and create the corresponding HTTP
     * response (or forward to another web component that will create it).
     * Return an <code>ActionForward</code> instance describing where and how
     * control should be forwarded, or <code>null</code> if the response has
     * already been completed.
     *
     * @param mapping The ActionMapping used to select this instance
     * @param form The optional ActionForm bean for this request (if any)
     * @param request The HTTP request we are processing
     * @param response The HTTP response we are creating
     *
     * @return Action to forward to
     * @exception Exception if an input/output error or servlet exception occurs
     */
    public ActionForward execute(
        ActionMapping mapping,
        ActionForm form,
        HttpServletRequest request,
        HttpServletResponse response)
        throws Exception {

    	
    	System.out.println(" viewbook action ..........");   
    	
    	HttpSession session = request.getSession();
    	
        DynaValidatorForm viewBookForm = (DynaValidatorForm) form;
        
        if(("addShopCart").equals(request.getParameter("addShopCart")))
        {
            
            String bookID = (String) viewBookForm.get("bookID");
            String bookName = (String) viewBookForm.get("bookName");
            String unitPrice = (String) viewBookForm.get("unitPrice");
            String discount = (String) viewBookForm.get("discount");
            
            ArrayList arrlist = null;
            
            if(session.getAttribute("shoppingCart") != null )
            {
                arrlist = (ArrayList) session.getAttribute("shoppingCart");
            } else {
            	arrlist = new ArrayList();
            	session.setAttribute("shoppingCart",arrlist);
            }
            
            boolean isShopingCart = false;
            for(int i=0; i<arrlist.size(); i++) {
            	
            	ShoppingCartDTO shoppingCartDTO = (ShoppingCartDTO) arrlist.get(i);
            	if(shoppingCartDTO.getBookID()== (new Integer(bookID)).intValue())
            	{
            		shoppingCartDTO.setQuantity(shoppingCartDTO.getQuantity()+1);
            		isShopingCart = true;
            		break;
            	}
            	
            }
            
            if(!isShopingCart) {
            	ShoppingCartDTO shoppingCartDTO = new ShoppingCartDTO();
            	BookDTO bookDTO = new BookDTO();
            	bookDTO.setBookName(bookName);
            	bookDTO.setUnitPrice(new BigDecimal(unitPrice));
            	bookDTO.setDiscount(new BigDecimal(discount));
            	shoppingCartDTO.setBookID((new Integer(bookID)).intValue());
            	shoppingCartDTO.setQuantity(1);
            	shoppingCartDTO.setBookDTO(bookDTO);
            	arrlist.add(shoppingCartDTO);
            }
            
            ActionMessages messages = new ActionMessages();
            messages.add("bookList",new ActionMessage("addShopCartsuccess"));     
            
            this.saveMessages(request,messages);
            
            return mapping.findForward("addShopCart");
        }       
        
        
        java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("yyyy-MM-dd");
        Integer bookID = new Integer((String)request.getParameter("bookID"));
        
       
        BookStoreMgrImp bookStoreMgr = new BookStoreMgrImp();
        BookDTO bookDTO = bookStoreMgr.getBook(bookID.intValue());
        
        viewBookForm.set("bookID",bookDTO.getBookID().toString());
        viewBookForm.set("bookName",bookDTO.getBookName());
        viewBookForm.set("author",bookDTO.getAuthor());
        viewBookForm.set("unitPrice",bookDTO.getUnitPrice().toString());
        viewBookForm.set("discount",bookDTO.getDiscount().toString());
        viewBookForm.set("isbn",bookDTO.getIsbn());
        viewBookForm.set("press",bookDTO.getPress().toString());
        if(bookDTO.getPublishingDate() != null)
        	viewBookForm.set("publishingDate",df.format(new java.util.Date(bookDTO.getPublishingDate().longValue())));
        viewBookForm.set("bookContent",bookDTO.getBookContent());

        
        return mapping.findForward("success");
    }


}