登录页面核心代码
BooklistServlet的参考代码:
购物车页面显示代码段参考:
<div id="login"> <h2>用户登陆</h2> <form method="post" action="LoginServlet" onsubmit="return check()"> <dl> <dt>用户名:</dt> <dd><input class="input-text" type="text" id="username" name="username" onblur="isUsernameNull()"/><span id="usernull"></span></dd> <dt>密 码:</dt> <dd><input class="input-text" type="password" id="password" name="password" onblur="isPasswordNull()"/><span id="pwdnull"></span></dd> <dt> </dt> <dd class="button"><input class="input-btn" type="submit" name="submit" value="" /> <input class="input-reg" type="button" name="register" value="" onclick="window.location='register.jsp';" /></dd> </dl> </form> </div>
LoginServlet的参考代码:
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String username = request.getParameter("username"); String password = request.getParameter("password"); UserinfoDao ud = new UserinfoDaoImpl(); Userinfo userinfo = ud.findByNameAndPwd(username, password); //如果登陆成功,则去bookListServlet if(userinfo!=null){ request.getSession().setAttribute("userinfo", userinfo); response.sendRedirect("BooklistServlet"); } else{ response.sendRedirect("login.jsp"); } }
BooklistServlet的参考代码:
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String page = req.getParameter("page"); if(page==null){ page="1";//第一次传过来就是默认首页 } int pageindex = Integer.parseInt(page);//否则,可能是第2页等 BookDao bd = new BookDaoImpl(); List<Book> books = bd.findBookByPage(pageindex, 3);//3:每页多少数据 int count = bd.count(); PageControler pc = new PageControler(); int total = pc.getTotalPages(count, 3);//总页数 //通过request设置属性,+forward转向; req.setAttribute("pageindex", pageindex); // HttpSession session=req.getSession(); // session.setAttribute("books",books); 也可以,可以直接跳转; req.setAttribute("books",books); req.setAttribute("total",total); req.getRequestDispatcher("index.jsp").forward(req,resp); }
购物车页面显示代码段参考:
<div id="content" class="wrap"> <div class="list bookList"> <form method="post" name="shoping" action="CartServlet" onsubmit="return checkCart();"> <table> <tr> <th class="checker">@</th> <th>书名</th> <th class="info">简介</th> <th class="price">价格</th> <th class="store">库存</th> <th class="view">图片预览</th> </tr> <c:forEach items="${books}" var="book"><!--book.id的值可以存放value --> <tr> <td><input type="checkbox" name="bookId" value="${book.id}" /></td> <td class="title">${book.bookname}</td> <td class="info">${book.info}</td> <td>¥${book.price}</td> <td>${book.stock}</td> <td class="thumb"><img src="images/book/${book.image}" /></td> </tr> </c:forEach> </table> <div class="page-spliter"> <a href="BooklistServlet?page=1">首页</a> <c:if test="${pageindex>1}"> <a href="BooklistServlet?page=${pageindex-1}">上一页</a> </c:if> <c:if test="${pageindex<total}"> <a href="BooklistServlet?page=${pageindex+1}">下一页</a> </c:if> <a href="BooklistServlet?page=${total}">尾页</a> </div> <div class="button"> <input class="input-btn" type="submit" name="submit" value="" /></div> </form> </div> </div>