最简单的小型商城实现：Serlvet+Jsp经典案例
来源：互联网 发布：pubmed数据库电脑官网 编辑：程序博客网 时间：2024/05/24 06:22
1. 前台client有关的页面
【header.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <link href="${pageContext.request.contextPath}/css/css.css" rel="stylesheet" type="text/css" /> <title>首页</title> </head> <body style="text-align:center"><br /><a href="${pageContext.request.contextPath}">首页</a><span style="width:800px"></span><c:if test="${empty user}"><!-- 也可以是：${sessionScope.user==null} --><a href="${pageContext.request.contextPath}/client/login.jsp">登录</a><a href="${pageContext.request.contextPath}/client/regist.jsp">注册</a></c:if><c:if test="${!empty user}">欢迎您：${user.username} <!-- ${sessionScope.user.username} --><a href="${pageContext.request.contextPath}/clientServlet?operation=logout">注销</a></c:if><a href="${pageContext.request.contextPath}/clientServlet?operation=showUsersOrders">我的订单</a> <a href="${pageContext.request.contextPath}/client/showCart.jsp">我的购物车</a><br /><script language="javascript">function qiehuan(num){for(var id = 0;id<=9;id++){if(id==num){document.getElementById("qh_con"+id).style.display="block";document.getElementById("mynav"+id).className="nav_on";}else{document.getElementById("qh_con"+id).style.display="none";document.getElementById("mynav"+id).className="";}}}</script><div id=menu_out> <div id=menu_in> <div id=menu> <UL id=nav> <LI><A class=nav_on id=mynav0 onmouseover=javascript:qiehuan(0) href="#"><SPAN>所有分类</SPAN></A></LI> <LI class="menu_line"></LI> </UL> <div id=menu_con> <div id=qh_con0 style="DISPLAY: block"> <UL> <c:forEach items="${sessionScope.cs}" var="c"> <LI><A href="${pageContext.request.contextPath}/clientServlet?operation=showCategoryBook&categoryId=${c.id}"><SPAN>${c.name }</SPAN></A></LI> <LI class=menu_line2></LI> </c:forEach> </UL> </div> </div> </div> </div> </div>
【listOrder.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %><h1>您近期的订单如下：</h1><table border="1" width="88%" style="text-align:center" align="center"><tr><th>订单号</th><th>金额</th><th>订单状态</th><th>明细</th></tr><c:forEach items="${ os}" var="o"><tr><td>${o.ordernum}</td><td>￥${o.price }元</td><td>${o.state==0?'未发货':'已发货'}</td><td><a href="${pageContext.request.contextPath}/clientServlet?operation=showOrdersDetail&ordersId=${o.id}">订单详情</a></td></tr></c:forEach></table> </body></html>
【login.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %><h1>用户登录</h1><form action="${pageContext.request.contextPath}/clientServlet?operation=login" method="post"> <table border="1" width="88%" style="text-align:center" align="center"><tr><td>用户名</td><td><input type="text" name="username"/></td></tr><tr><td>密码</td><td><input type="password" name="password"/></td></tr><tr><td colspan="2"><input type="submit" value="登录"/></td></tr></table></form> </body></html>
【orderMsg.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %>订单号：${o.ordernum} </br>金额：￥${o.price }元</br>明细如下：</br><table border="1" width="88%" style="text-align:center" align="center"><tr><th>书名</th><th>作者</th><th>单价</th><th>小计</th><th>数量</th></tr><c:forEach items="${o.items }" var="i"><tr><td>${i.book.name}</td><td>${i.book.author}</td><td>￥${i.book.price}元</td><td>${i.num}</td><td>￥${i.price}元</td></tr></c:forEach></table> 收货信息如下：</br> 地址：${sessionScope.user.address}</br> 电话:${sessionScope.user.cellphone}</br> </body></html>
【regist.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %><h1>新用户注册</h1><form action="${pageContext.request.contextPath}/clientServlet?operation=regist" method="post"> <table border="1" width="88%" style="text-align:center" align="center"><tr><td>用户名</td><td><input type="text" name="username" /></td></tr><tr><td>密码</td><td><input type="password" name="password" /></td></tr><tr><td>确认密码</td><td><input type="password" name="password1" /></td></tr><tr><td>电话</td><td><input type="text" name="cellphone" /></td></tr><tr><td>手机</td><td><input type="text" name="mobilephone" /></td></tr><tr><td>住址</td><td><input type="text" name="address" /></td></tr><tr><td>邮箱</td><td><input type="text" name="email" /></td></tr><tr><td colspan="2"><input type="submit" value="注册" /></td></tr></table></form> </body></html>
【showChart.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %><h1>您购买的商品如下</h1><c:if test="${empty sessionScope.cart.items}"><img height="180" width="120" src="${pageContext.request.contextPath }/files/0.jpg"/><br/>对不起，您没有购买任何商品</c:if><c:if test="${!empty sessionScope.cart.items}"><table border="1" width="88%" style="text-align:center" align="center"><tr><th>书名</th><th>作者</th><th>单价</th><th>数量</th><th>小计</th><th>操作</th></tr><c:forEach items="${ sessionScope.cart.items}" var="me"><tr><td>${me.value.book.name}</td><td>${me.value.book.author }</td><td>${me.value.book.price }</td><td>${me.value.num }</td><td>${me.value.price}</td><td><a href="#" >删除</a></td></tr></c:forEach><tr><td colspan="6" align="right">总数量：${sessionScope.cart.num} 付款金额：${sessionScope.cart.price} <a href="${pageContext.request.contextPath }/clientServlet?operation=genOrders">生成订单</a></td></tr></table></c:if> </body></html>
【welcome.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %><h1>欢迎光临</h1><!-- 显示分页数据，不分类的 --><table align="center"><tr ><c:forEach items="${page.records}" var="b"><td><table><tr><td><img src="${pageContext.request.contextPath}/files/${b.image}"/></td></tr><tr><td>书名：${b.name }<br />作者：${b.author }<br />原价：<strike>888</strike><br/>震撼价：${b.price}</td></tr><tr><td><a href="${pageContext.request.contextPath}/clientServlet?operation=buyBook&bookId=${b.id}">购买</a></td></tr></table></td></c:forEach></tr></table><tr align="center"><td><%@ include file="/commons/page.jsp" %></td></tr> </body></html>2. 前台manager相关页面
【header.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %><%@ taglib uri="http://hw.com/jsp/jstl/myfunctions" prefix="myfn" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><link href="${pageContext.request.contextPath}/css/css.css" rel="stylesheet" type="text/css" /> <head> <title>首页</title> </head> <body style="text-align:center"> <br /><br /><script language="javascript">function qiehuan(num){for(var id = 0;id<=9;id++){if(id==num){document.getElementById("qh_con"+id).style.display="block";document.getElementById("mynav"+id).className="nav_on";}else{document.getElementById("qh_con"+id).style.display="none";document.getElementById("mynav"+id).className="";}}}</script><div id=menu_out> <div id=menu_in> <div id=menu> <UL id=nav> <LI><A class=nav_on id=mynav0 onmouseover=javascript:qiehuan(0) href="#"><SPAN>分类管理</SPAN></A></LI> <LI class="menu_line"></LI> <li><a href="#" onmouseover="javascript:qiehuan(1)" id="mynav1" class="nav_off"><span>图书管理</span></a></li> <li class="menu_line"></li> <li><a href="#" onmouseover="javascript:qiehuan( 2)" id="mynav2" class="nav_off"><span>订单管理</span></a></li> <li class="menu_line"></li> </UL> <div id=menu_con> <div id=qh_con0 style="DISPLAY: block"> <UL> <LI><a href="${pageContext.request.contextPath}/manage/addCategory.jsp"><span>添加分类</span></A></LI> <LI class=menu_line2></LI> <LI><A href="${pageContext.request.contextPath}/manageServlet?operation=listCategory"><SPAN>查询分类</SPAN></A></LI> <LI class=menu_line2></LI> </UL> </div> <div id=qh_con1 style="DISPLAY: none"> <UL> <LI><a href="${pageContext.request.contextPath}/manageServlet?operation=showCategoryUI"><span>添加图书</span></A></LI> <LI class=menu_line2></LI> <LI><A href="${pageContext.request.contextPath}/manageServlet?operation=showAllBook"><SPAN>查询图书</SPAN></A></LI> <LI class=menu_line2></LI> </UL> </div> <div id=qh_con2 style="DISPLAY: none"> <UL> <LI><a href="${pageContext.request.contextPath}/manageServlet?operation=showAllOrders0"><span>待处理订单</span></A></LI> <LI class=menu_line2></LI> <LI><A href="${pageContext.request.contextPath}/manageServlet?operation=showAllOrders1"><SPAN>已处理订单</SPAN></A></LI> <LI class=menu_line2></LI> </UL> </div> </div> </div> </div></div>
【listBook.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/manage/header.jsp" %><h3>书籍列表</h3><table border="1" width="88%" align="center" style="text-align:center"><tr><th>书名</th><th>作者</th><th>描述</th><th>所属分类</th><th>图片</th><th>操作</th></tr><c:forEach items="${page.records}" var="b"><tr><td>${ b.name}</td><td>${b.author }</td><td>${b.description }</td><td>${myfn:getCategoryNameByIdEL(b.category_id)}</td><td><a href="${pageContext.request.contextPath}/files/${b.image}">查看图片</a></td><td><a href="#" >[修改]</a> <a href="#" >[删除]</a></td></tr></c:forEach></table><!-- 视频内容简单分页内容开始 --><!-- 第${page.pagenum}页/共${page.totalpage}页 <a href="${pageContext.request.contextPath}/manageServlet?operation=showAllBook&pagenum=${page.pagenum-1>0?pagenum-1:1}">上一页</a><a href="${pageContext.request.contextPath}/manageServlet?operation=showAllBook&pagenum=${page.pagenum+1>page.totalpage?page.totalpage:(page.pagenum+1)}">下一页</a>--><%@ include file="/commons/page.jsp" %><!-- 视频内容简单分页内容结束 --> </body></html>
【listCategory.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/manage/header.jsp" %><h2>分类列表</h2><c:if test="${empty cs}">对不起，没有分类，请先添加</c:if><c:if test="${!empty cs}"><table border="1" width="88%" style="text-align:center" align="center"><tr><th>选择</th><th>分类名称</th><th>描述</th><th>操作</th></tr><c:forEach items="${cs}" var="c"><tr><td><input type="checkbox" name="cids" value="${c.id }"/></td><td>${c.name }</td><td>${c.description }</td><td><a href="#" >更改</a><a href="#" >删除</a></td><tr></c:forEach></table></c:if> </body></html>
【addBook.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/manage/header.jsp" %><h2 align="center">添加图书</h2><form action="${pageContext.request.contextPath}/manageServlet?operation=addBook" method="post" enctype="multipart/form-data" ><table border="0" width="88%" align="center"><tr><td>书名</td><td><input type="text" name="name"/></td></tr><tr><td>作者</td><td><input type="text" name="author"/></td></tr><tr><td>售价</td><td><input type="text" name="price"/></td></tr><tr><td>图片</td><td><input type="file" name="img"/> <!-- ★和javabean的名字不一样 --></td></tr><tr><td>描述</td><td><textarea rows="3" cols="38" name="description"></textarea></td></tr><tr><td>所属分类</td><td><select name="category_id"><c:forEach items="${cs}" var="c"><option value="${c.id}">${c.name}</option> </c:forEach></select></td></tr><tr><td><input type="submit" value="添加图书"></td></tr></table></form>${message} </body></html>
【addCategory.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/manage/header.jsp" %><form action="${pageContext.request.contextPath}/manageServlet?operation=addCategory" method="post"> <table align="center" border="1" width="88%" ><tr><td>*分类名称</td><td><input type="text" name="name"/></td></tr><tr><td>概述</td><td><textarea rows="3" cols="34" name="description"></textarea></td></tr><tr><td colspan="2"><input type="submit" value="添加"/></td></tr></table></form> </body></html>【showOrders.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/client/header.jsp" %><h1>未发货订单如下：</h1><table border="1" width="88%" style="text-align:center" align="center"><tr><th>用户</th><th>订单号</th><th>金额</th><th>订单状态</th><th>明细</th></tr><c:forEach items="${ os}" var="o"><tr><td>${o.user.username}<td>${o.ordernum}</td><td>￥${o.price }元</td><td>${o.state==0?'未发货':'已发货'}</td><td><a href="${pageContext.request.contextPath}/manageServlet?operation=showOrdersDetail&ordersId=${o.id}">订单详情</a></td></tr></c:forEach></table> </body></html>【orderMsg.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/manage/header.jsp" %>订单号：${o.ordernum} </br>金额：￥${o.price }元</br>明细如下：</br><table border="1" width="88%" style="text-align:center" align="center"><tr><th>书名</th><th>作者</th><th>单价</th><th>小计</th><th>数量</th></tr><c:forEach items="${o.items }" var="i"><tr><td>${i.book.name}</td><td>${i.book.author}</td><td>￥${i.book.price}元</td><td>${i.num}</td><td>￥${i.price}元</td></tr></c:forEach></table> 收货信息如下：</br> 地址：${o.user.address}</br> 电话:${o.user.cellphone}</br> </hr> <c:if test="${o.state==0 }"> <a href="${pageContext.request.contextPath}/manageServlet?operation=sureSend&ordersId=${o.id}">确认发货</a> </c:if> </body></html>【welcome.jsp】
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%><%@ include file="/manage/header.jsp" %><h1 align="center">欢迎使用</h1> </body></html>
3. 后台代码
后台代码管理员和客户两种基本角色各自一个Servlet解决：
客户servlet：ClientServlet
public class ClientServlet extends HttpServlet {private BusinessService bs = new BusinessServiceImpl();public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String operation = request.getParameter("operation");if("showIndexCategory".equals(operation)){showIndexCategory(request,response);}if("showCategoryBook".equals(operation)){showCategoryBook(request,response);}if("buyBook".equals(operation)){buyBook(request,response);}if("genOrders".equals(operation)){genOrders(request,response);}if("regist".equals(operation)){regist(request,response);}if("login".equals(operation)){login(request,response);}if("logout".equals(operation)){logout(request,response);}if("showUsersOrders".equals(operation)){showUsersOrders(request,response);}if("showOrdersDetail".equals(operation)){showOrdersDetail(request,response);}}private void showOrdersDetail(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//1.判断用户是否登录。1.1没有登录，转向登录页面HttpSession session = request.getSession();User user = (User)session.getAttribute("user");if(user==null){request.setAttribute("message", "请先登录！2秒后将自动转向登录页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath()+"/client/login.jsp'/>");request.getRequestDispatcher("/client/message.jsp").forward(request, response);return ;}String ordersId=request.getParameter("ordersId");Orders o = bs.findOrdersById(ordersId);//★★查询的是订单明细，与通过用户id查订单是不同的，明细中还要查出书的信息request.setAttribute("o", o);request.getRequestDispatcher("/client/ordersMsg.jsp").forward(request, response);}//依据用户id查询用户订单private void showUsersOrders(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//1.判断用户是否登录。1.1没有登录，转向登录页面HttpSession session = request.getSession();User user = (User)session.getAttribute("user");if(user==null){request.setAttribute("message", "请先登录！2秒后将自动转向登录页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath()+"/client/login.jsp'/>");request.getRequestDispatcher("/client/message.jsp").forward(request, response);return ;}List<Orders> os = bs.findOrdersByUserId(user.getId());request.getSession().setAttribute("os", os);request.getRequestDispatcher("client/listOrders.jsp").forward(request,response);//转向主页}private void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {request.getSession().invalidate();//注意：注销时是直接到根目录下request.getRequestDispatcher("/").forward(request, response);}private void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {String username = request.getParameter("username");String password = request.getParameter("password");User user = bs.login(username,password);if(user==null){request.setAttribute("message", "用户名或密码错误！");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}else{request.getSession().setAttribute("user", user);response.sendRedirect(request.getContextPath());//转向主页}}private void regist(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {User user = WebUtil.fillBean(request, User.class);if(!(user.getPassword()).equals(user.getPassword1())){//这里是比较request.setAttribute("message", "两次密码输入不匹配");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}bs.regist(user);request.setAttribute("message", "注册成功");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}//生成订单，把订单和订单项的信息存到数据库中private void genOrders(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//1.判断用户是否登录。1.1没有登录，转向登录页面HttpSession session = request.getSession();User user = (User)session.getAttribute("user");if(user==null){request.setAttribute("message", "请先登录！2秒后将自动转向登录页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath()+"/client/login.jsp'/>");request.getRequestDispatcher("/client/message.jsp").forward(request, response);return ;}//2.如果已经登录，则将购物车里面的东西按规则生成订单信息//取出购物车：Cart Map<String,CartItem> Cart cart = (Cart)session.getAttribute("cart");//购物车<->订单Orders orders = new Orders();orders.setNum(cart.getNum());orders.setPrice(cart.getPrice());//★▲弄购物项List<OrdersItem> ordersItems = new ArrayList<OrdersItem>();//订单项<->订单项for(Map.Entry<String, CartItem> item:cart.getItems().entrySet()){//★▲▲填充模型CartItem i = item.getValue();//得到购物项OrdersItem orderItem = new OrdersItem();orderItem.setNum(i.getNum());orderItem.setPrice(i.getPrice());orderItem.setBook(i.getBook());ordersItems.add(orderItem);}orders.setItems(ordersItems);bs.addOrders(orders,user);//删除购物车request.getSession().removeAttribute("cart");request.setAttribute("message","订单生成成功！购物车为空");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}private void buyBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//购买书的idString bookId = request.getParameter("bookId");//获取要购买的书Book book = bs.findBookById(bookId);HttpSession session = request.getSession();//★▲从HttpSession中取出购物车Cart cart = (Cart)session.getAttribute("cart");//>创建购物车（判断是否有购物车）并放到httpsession中（购物车）if(cart==null){cart = new Cart();session.setAttribute("cart",cart);}//把书放到购物车中cart.addBook(book);//提示购买成功request.setAttribute("message", "购买成功，2秒后返回主页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath());//页面转发request.getRequestDispatcher("/client/message.jsp").forward(request, response);}//按照分类进行分页书籍查询private void showCategoryBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String pagenum = request.getParameter("pagenum");String categoryId = request.getParameter("categoryId");//★1.相对于下面那个方法再添加的Page page = bs.findPageRecords(pagenum,categoryId);//★2.相对于下面那个方法再添加的page.setUrl("/clientServlet?operation=showCategoryBook&categoryId="+categoryId);//★3.相对于下面那个方法再添加的request.setAttribute("page", page);request.getRequestDispatcher("/client/welcome.jsp").forward(request,response);}//查询所有分类，封装后，便于前端主页的显示private void showIndexCategory(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Category> cs = bs.findAllCategory();request.getSession().setAttribute("cs", cs);//★★用session放大范围以保持header.jsp部分的数据维护//查询所有书籍,还要分页String pagenum = request.getParameter("pagenum");Page page = bs.findPageRecords(pagenum);page.setUrl("/clientServlet?operation=showIndexCategory");request.setAttribute("page", page);request.getRequestDispatcher("/client/welcome.jsp").forward(request,response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("UTF-8");response.setContentType("text/html;charset=UTF-8");this.doGet(request, response);}}</span>- 解决管理员基本功能的servlet：ManageServlet
public class ManageServlet extends HttpServlet {private BusinessService bs = new BusinessServiceImpl();public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String operation = request.getParameter("operation");if("addCategory".equals(operation))addCategory(request,response);if("listCategory".equals(operation))listCategory(request,response);if("showCategoryUI".equals(operation))showCategoryUI(request,response);if("addBook".equals(operation))addBook(request,response);if("showAllBook".equals(operation))showAllBook(request,response);if("showAllOrders0".equals(operation)){showAllOrders0(request,response);}if("showAllOrders1".equals(operation)){showAllOrders1(request,response);}if("showOrdersDetail".equals(operation)){showOrdersDetail(request,response);}if("sureSend".equals(operation)){sureSend(request,response);}}private void sureSend(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String ordersId = request.getParameter("ordersId");bs.sureOrders(ordersId);request.setAttribute("message","成功发货");request.getRequestDispatcher("/message.jsp").forward(request, response);}private void showOrdersDetail(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//哪个用户的也要查询出来String ordersId = request.getParameter("ordersId");Orders o = bs.findOrdersById(ordersId);request.setAttribute("o", o);request.getRequestDispatcher("/manage/ordersMsg.jsp").forward(request, response);}private void showAllOrders1(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Orders> os = bs.findOrdersByState(1);request.setAttribute("os", os);request.getRequestDispatcher("/manage/showOrders.jsp").forward(request, response);}//显示所有为发货的订单private void showAllOrders0(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Orders> os = bs.findOrdersByState(0);request.setAttribute("os", os);request.getRequestDispatcher("/manage/showOrders.jsp").forward(request, response);}//后台查询所有图书分页private void showAllBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String pagenum = request.getParameter("pagenum");Page page = bs.findPageRecords(pagenum);page.setUrl("manageServlet?operation=showAllBook");//第二种分页方式传递到jsp页面的数据request.setAttribute("page",page);request.getRequestDispatcher("/manage/listBook.jsp").forward(request, response);}//添加书籍到数据库：jsp页面传过来的是mutipart类型private void addBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String resultPath = "";String storePath = getServletContext().getRealPath("/files");try {Book book = new Book();DiskFileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);List<FileItem> items = upload.parseRequest(request);//获得待解析数据//解析数据for(FileItem item:items){if(item.isFormField()){//封装数据到javabean中String filedName = item.getFieldName();//字段名，即javabean的属性名，除了图片String filedValue = item.getString(request.getCharacterEncoding());//保证得到的字符串是UTF-8格式BeanUtils.setProperty(book,filedName,filedValue);//到这一步，除了图片路径，其它数据都有了}else{//处理文件上传InputStream in = item.getInputStream();String fileName = item.getName();//用户上传文件路径名//从用户上传的文件路径名中截取文件名。然后在加随机码，以防止用户上传的文件名相同发生冲突fileName = UUID.randomUUID()+fileName.substring(fileName.lastIndexOf("\\")+1);//设置存储的图片文件名book.setImage(fileName);OutputStream out = new FileOutputStream(storePath+"\\"+fileName);byte b[] = new byte[1024];int len = -1;while((len=in.read(b))!=-1){out.write(b,0,len);}out.close();in.close();item.delete();//★删除临时文件}}//System.out.println(book);bs.addBook(book);//★★先测试，然后看方法对不对，在写service和dao层中写该方法 List<Category> cs = bs.findAllCategory();request.setAttribute("cs", cs);//如果没有这两句，添加完成后添加页面将不会显示图书分类resultPath = "/manage/addBook.jsp";request.setAttribute("message","<script type='text/javascript'>alert('添加成功')</script>");} catch (Exception e) {e.printStackTrace();resultPath="/message.jsp";//TODOrequest.setAttribute("message", "上传出问题了");}request.getRequestDispatcher(resultPath).forward(request, response);}private void showCategoryUI(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Category> cs = bs.findAllCategory();request.setAttribute("cs", cs);request.getRequestDispatcher("/manage/addBook.jsp").forward(request, response);}private void listCategory(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Category> cs = bs.findAllCategory();request.setAttribute("cs", cs);request.getRequestDispatcher("/manage/listCategory.jsp").forward(request, response);}private void addCategory(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {Category ca = WebUtil.fillBean(request, Category.class);bs.addCategory(ca);request.setAttribute("message", "<script type='text/javascript'>alert('添加成功')</script>");request.getRequestDispatcher("/manage/addCategory.jsp").forward(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("UTF-8");response.setContentType("text/html;charset=UTF-8");this.doGet(request, response);}}
客户servlet：ClientServlet
public class ClientServlet extends HttpServlet {private BusinessService bs = new BusinessServiceImpl();public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String operation = request.getParameter("operation");if("showIndexCategory".equals(operation)){showIndexCategory(request,response);}if("showCategoryBook".equals(operation)){showCategoryBook(request,response);}if("buyBook".equals(operation)){buyBook(request,response);}if("genOrders".equals(operation)){genOrders(request,response);}if("regist".equals(operation)){regist(request,response);}if("login".equals(operation)){login(request,response);}if("logout".equals(operation)){logout(request,response);}if("showUsersOrders".equals(operation)){showUsersOrders(request,response);}if("showOrdersDetail".equals(operation)){showOrdersDetail(request,response);}}private void showOrdersDetail(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//1.判断用户是否登录。1.1没有登录，转向登录页面HttpSession session = request.getSession();User user = (User)session.getAttribute("user");if(user==null){request.setAttribute("message", "请先登录！2秒后将自动转向登录页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath()+"/client/login.jsp'/>");request.getRequestDispatcher("/client/message.jsp").forward(request, response);return ;}String ordersId=request.getParameter("ordersId");Orders o = bs.findOrdersById(ordersId);//★★查询的是订单明细，与通过用户id查订单是不同的，明细中还要查出书的信息request.setAttribute("o", o);request.getRequestDispatcher("/client/ordersMsg.jsp").forward(request, response);}//依据用户id查询用户订单private void showUsersOrders(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//1.判断用户是否登录。1.1没有登录，转向登录页面HttpSession session = request.getSession();User user = (User)session.getAttribute("user");if(user==null){request.setAttribute("message", "请先登录！2秒后将自动转向登录页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath()+"/client/login.jsp'/>");request.getRequestDispatcher("/client/message.jsp").forward(request, response);return ;}List<Orders> os = bs.findOrdersByUserId(user.getId());request.getSession().setAttribute("os", os);request.getRequestDispatcher("client/listOrders.jsp").forward(request,response);//转向主页}private void logout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {request.getSession().invalidate();//注意：注销时是直接到根目录下request.getRequestDispatcher("/").forward(request, response);}private void login(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {String username = request.getParameter("username");String password = request.getParameter("password");User user = bs.login(username,password);if(user==null){request.setAttribute("message", "用户名或密码错误！");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}else{request.getSession().setAttribute("user", user);response.sendRedirect(request.getContextPath());//转向主页}}private void regist(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {User user = WebUtil.fillBean(request, User.class);if(!(user.getPassword()).equals(user.getPassword1())){//这里是比较request.setAttribute("message", "两次密码输入不匹配");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}bs.regist(user);request.setAttribute("message", "注册成功");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}//生成订单，把订单和订单项的信息存到数据库中private void genOrders(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//1.判断用户是否登录。1.1没有登录，转向登录页面HttpSession session = request.getSession();User user = (User)session.getAttribute("user");if(user==null){request.setAttribute("message", "请先登录！2秒后将自动转向登录页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath()+"/client/login.jsp'/>");request.getRequestDispatcher("/client/message.jsp").forward(request, response);return ;}//2.如果已经登录，则将购物车里面的东西按规则生成订单信息//取出购物车：Cart Map<String,CartItem> Cart cart = (Cart)session.getAttribute("cart");//购物车<->订单Orders orders = new Orders();orders.setNum(cart.getNum());orders.setPrice(cart.getPrice());//★▲弄购物项List<OrdersItem> ordersItems = new ArrayList<OrdersItem>();//订单项<->订单项for(Map.Entry<String, CartItem> item:cart.getItems().entrySet()){//★▲▲填充模型CartItem i = item.getValue();//得到购物项OrdersItem orderItem = new OrdersItem();orderItem.setNum(i.getNum());orderItem.setPrice(i.getPrice());orderItem.setBook(i.getBook());ordersItems.add(orderItem);}orders.setItems(ordersItems);bs.addOrders(orders,user);//删除购物车request.getSession().removeAttribute("cart");request.setAttribute("message","订单生成成功！购物车为空");request.getRequestDispatcher("/client/message.jsp").forward(request, response);}private void buyBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//购买书的idString bookId = request.getParameter("bookId");//获取要购买的书Book book = bs.findBookById(bookId);HttpSession session = request.getSession();//★▲从HttpSession中取出购物车Cart cart = (Cart)session.getAttribute("cart");//>创建购物车（判断是否有购物车）并放到httpsession中（购物车）if(cart==null){cart = new Cart();session.setAttribute("cart",cart);}//把书放到购物车中cart.addBook(book);//提示购买成功request.setAttribute("message", "购买成功，2秒后返回主页面。<meta http-equiv='Refresh' content='2;" +"URL="+request.getContextPath());//页面转发request.getRequestDispatcher("/client/message.jsp").forward(request, response);}//按照分类进行分页书籍查询private void showCategoryBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String pagenum = request.getParameter("pagenum");String categoryId = request.getParameter("categoryId");//★1.相对于下面那个方法再添加的Page page = bs.findPageRecords(pagenum,categoryId);//★2.相对于下面那个方法再添加的page.setUrl("/clientServlet?operation=showCategoryBook&categoryId="+categoryId);//★3.相对于下面那个方法再添加的request.setAttribute("page", page);request.getRequestDispatcher("/client/welcome.jsp").forward(request,response);}//查询所有分类，封装后，便于前端主页的显示private void showIndexCategory(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Category> cs = bs.findAllCategory();request.getSession().setAttribute("cs", cs);//★★用session放大范围以保持header.jsp部分的数据维护//查询所有书籍,还要分页String pagenum = request.getParameter("pagenum");Page page = bs.findPageRecords(pagenum);page.setUrl("/clientServlet?operation=showIndexCategory");request.setAttribute("page", page);request.getRequestDispatcher("/client/welcome.jsp").forward(request,response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("UTF-8");response.setContentType("text/html;charset=UTF-8");this.doGet(request, response);}}</span>- 解决管理员基本功能的servlet：ManageServlet
public class ManageServlet extends HttpServlet {private BusinessService bs = new BusinessServiceImpl();public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {String operation = request.getParameter("operation");if("addCategory".equals(operation))addCategory(request,response);if("listCategory".equals(operation))listCategory(request,response);if("showCategoryUI".equals(operation))showCategoryUI(request,response);if("addBook".equals(operation))addBook(request,response);if("showAllBook".equals(operation))showAllBook(request,response);if("showAllOrders0".equals(operation)){showAllOrders0(request,response);}if("showAllOrders1".equals(operation)){showAllOrders1(request,response);}if("showOrdersDetail".equals(operation)){showOrdersDetail(request,response);}if("sureSend".equals(operation)){sureSend(request,response);}}private void sureSend(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String ordersId = request.getParameter("ordersId");bs.sureOrders(ordersId);request.setAttribute("message","成功发货");request.getRequestDispatcher("/message.jsp").forward(request, response);}private void showOrdersDetail(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {//哪个用户的也要查询出来String ordersId = request.getParameter("ordersId");Orders o = bs.findOrdersById(ordersId);request.setAttribute("o", o);request.getRequestDispatcher("/manage/ordersMsg.jsp").forward(request, response);}private void showAllOrders1(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Orders> os = bs.findOrdersByState(1);request.setAttribute("os", os);request.getRequestDispatcher("/manage/showOrders.jsp").forward(request, response);}//显示所有为发货的订单private void showAllOrders0(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Orders> os = bs.findOrdersByState(0);request.setAttribute("os", os);request.getRequestDispatcher("/manage/showOrders.jsp").forward(request, response);}//后台查询所有图书分页private void showAllBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String pagenum = request.getParameter("pagenum");Page page = bs.findPageRecords(pagenum);page.setUrl("manageServlet?operation=showAllBook");//第二种分页方式传递到jsp页面的数据request.setAttribute("page",page);request.getRequestDispatcher("/manage/listBook.jsp").forward(request, response);}//添加书籍到数据库：jsp页面传过来的是mutipart类型private void addBook(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {String resultPath = "";String storePath = getServletContext().getRealPath("/files");try {Book book = new Book();DiskFileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);List<FileItem> items = upload.parseRequest(request);//获得待解析数据//解析数据for(FileItem item:items){if(item.isFormField()){//封装数据到javabean中String filedName = item.getFieldName();//字段名，即javabean的属性名，除了图片String filedValue = item.getString(request.getCharacterEncoding());//保证得到的字符串是UTF-8格式BeanUtils.setProperty(book,filedName,filedValue);//到这一步，除了图片路径，其它数据都有了}else{//处理文件上传InputStream in = item.getInputStream();String fileName = item.getName();//用户上传文件路径名//从用户上传的文件路径名中截取文件名。然后在加随机码，以防止用户上传的文件名相同发生冲突fileName = UUID.randomUUID()+fileName.substring(fileName.lastIndexOf("\\")+1);//设置存储的图片文件名book.setImage(fileName);OutputStream out = new FileOutputStream(storePath+"\\"+fileName);byte b[] = new byte[1024];int len = -1;while((len=in.read(b))!=-1){out.write(b,0,len);}out.close();in.close();item.delete();//★删除临时文件}}//System.out.println(book);bs.addBook(book);//★★先测试，然后看方法对不对，在写service和dao层中写该方法 List<Category> cs = bs.findAllCategory();request.setAttribute("cs", cs);//如果没有这两句，添加完成后添加页面将不会显示图书分类resultPath = "/manage/addBook.jsp";request.setAttribute("message","<script type='text/javascript'>alert('添加成功')</script>");} catch (Exception e) {e.printStackTrace();resultPath="/message.jsp";//TODOrequest.setAttribute("message", "上传出问题了");}request.getRequestDispatcher(resultPath).forward(request, response);}private void showCategoryUI(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Category> cs = bs.findAllCategory();request.setAttribute("cs", cs);request.getRequestDispatcher("/manage/addBook.jsp").forward(request, response);}private void listCategory(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {List<Category> cs = bs.findAllCategory();request.setAttribute("cs", cs);request.getRequestDispatcher("/manage/listCategory.jsp").forward(request, response);}private void addCategory(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {Category ca = WebUtil.fillBean(request, Category.class);bs.addCategory(ca);request.setAttribute("message", "<script type='text/javascript'>alert('添加成功')</script>");request.getRequestDispatcher("/manage/addCategory.jsp").forward(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {request.setCharacterEncoding("UTF-8");response.setContentType("text/html;charset=UTF-8");this.doGet(request, response);}} 1 0
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