booklistaction.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: TypeAction.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 different 'types'.
 *
 */
public final class BookListAction extends Action {

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


    public ActionForward execute(
        ActionMapping mapping,
        ActionForm form,
        HttpServletRequest request,
        HttpServletResponse response)
        throws Exception {
    	
    	System.out.println(" user list action ..........");
    	
        HttpSession session = request.getSession();
        
        DynaValidatorForm bookListForm = (DynaValidatorForm)  form;
        
        if("addShopCart".equals(request.getParameter("action")))
        {
            int index = new Integer(request.getParameter("index")).intValue();
            
            String bookID = (String) bookListForm.get("bookID", index);
            String bookName = (String) bookListForm.get("bookName", index);
            String unitPrice = (String) bookListForm.get("unitPrice", index);
            String discount = (String) bookListForm.get("discount", index);
            
            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");
        }
    	
        BookStoreMgrImp bookStoreMgr = new BookStoreMgrImp();
        BookDTO[] bookDTOs =  bookStoreMgr.getBookList().getBookDTO();
        
        java.text.SimpleDateFormat df = new java.text.SimpleDateFormat("yyyy-MM-dd");
        
        bookListForm.set("bookID",new String[bookDTOs.length]);
        bookListForm.set("bookName",new String[bookDTOs.length]);    
        bookListForm.set("unitPrice",new String[bookDTOs.length]);
        bookListForm.set("discount",new String[bookDTOs.length]);   
        bookListForm.set("isbn",new String[bookDTOs.length]);
        bookListForm.set("press",new String[bookDTOs.length]);   
        bookListForm.set("publishingDate",new String[bookDTOs.length]);  
        
        for (int i=0; i<bookDTOs.length; i++) {
        	
        	bookListForm.set("bookID",i,bookDTOs[i].getBookID().toString());
        	bookListForm.set("bookName",i,bookDTOs[i].getBookName().toString());
        	bookListForm.set("unitPrice",i,bookDTOs[i].getUnitPrice().toString());
        	bookListForm.set("discount",i,bookDTOs[i].getDiscount().toString());
        	bookListForm.set("isbn",i,bookDTOs[i].getIsbn());
        	bookListForm.set("press",i,bookDTOs[i].getPress().toString());
        	
        	if(bookDTOs[i].getPublishingDate() != null)
        	  bookListForm.set("publishingDate",i,df.format(new java.util.Date(bookDTOs[i].getPublishingDate().longValue())));
        	else
        	  bookListForm.set("publishingDate",i,"&nbsp");

        }
               
        return mapping.findForward("success");
    }


}