Question

jsp实现购物车功能

jsp实现购物车功能,希望大家能够帮忙指点迷津!

Answer 1

http://www.codepub.com/software/download-73-1.html 到这个网站去看哈 有可能会帮助你的

Answer 2

// Map<Integer,Book> books = null; // // if(request.getSession().getAttribute("buy")==null){ // books = new HashMap<Integer,Book>(); // if(books.containsKey(bookId)){ // books.get(bookId).setBuyCount(books.get(bookId).getBuyCount()+1); // }else{ // books.put(bookId, bdao.findById(bookId)); // } // }else{ // books = (Map<Integer,Book>)request.getSession().getAttribute("buy"); // if(books.containsKey(bookId)){ // books.get(bookId).setBuyCount(books.get(bookId).getBuyCount()+1); // }else{ // books.put(bookId, bdao.findById(bookId)); // } // } // <c:forEach items="<%=((Map)request.getSession().getAttribute("buy")).values()%>" var="book"> List<Book> books = null; boolean flag = false; if(request.getSession().getAttribute("buy")==null){ books = new ArrayList<Book>(); books.add(bdao.findById(bookId)); }else{ books = (List<Book>)request.getSession().getAttribute("buy"); Iterator<Book> iterator = books.iterator(); while(iterator.hasNext()){ Book b = iterator.next(); if(b.getBookId()==bookId){ b.setBuyCount(b.getBuyCount()+1); flag = true; break; } } if(!flag){ books.add(bdao.findById(bookId)); } }
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