1、创建相关类

• domain：
• Order
• OrderItem
• dao：OrderDao
• service：OrderService
• web.servlete：OrderServlet

/*** 订单条目类*/ public class OrderItem {private String iid;private int count;// 数量private double subtotal;// 小计private Order order;// 所属订单private Book book;// 所要购买的图书 } /*** 订单类*/ public class Order {private String oid;private Date ordertime;// 下单时间private double total;// 合计private int state;// 订单状态有四种：1未付款 2已付款但未发货 3已发货但未确认收货 4已确认交易成功private User owner;// 订单所有者private String address;// 收货地址private List<OrderItem> orderItemList;//当前订单下所有条目 } public class OrderDao {private QueryRunner qr = new TxQueryRunner();/*** 添加订单* @param order*/public void addOrder(Order order) {try {String sql = "insert into orders values(?,?,?,?,?,?)";/** 处理util的Date转换成sql的Timestamp*/Timestamp timestamp = new Timestamp(order.getOrdertime().getTime());Object[] params = {order.getOid(), timestamp, order.getTotal(),order.getState(), order.getOwner().getUid(),order.getAddress()};qr.update(sql, params);} catch(SQLException e) {throw new RuntimeException(e);}}/*** 插入订单条目* @param orderItemList*/public void addOrderItemList(List<OrderItem> orderItemList) {/*** QueryRunner类的batch(String sql, Object[][] params)* 其中params是多个一维数组！* 每个一维数组都与sql在一起执行一次，多个一维数组就执行多次*/try {String sql = "insert into orderitem values(?,?,?,?,?)";/** 把orderItemList转换成两维数组* 把一个OrderItem对象转换成一个一维数组*/Object[][] params = new Object[orderItemList.size()][];// 循环遍历orderItemList，使用每个orderItem对象为params中每个一维数组赋值for(int i = 0; i < orderItemList.size(); i++) {OrderItem item = orderItemList.get(i);params[i] = new Object[]{item.getIid(), item.getCount(), item.getSubtotal(), item.getOrder().getOid(),item.getBook().getBid()}; }qr.batch(sql, params);//执行批处理} catch(SQLException e) {throw new RuntimeException(e);}}/*** 按uid查询订单* @param uid* @return*/public List<Order> findByUid(String uid) {/** 1. 通过uid查询出当前用户的所有List<Order>* 2. 循环遍历每个Order，为其加载他的所有OrderItem*/try {/** 1. 得到当前用户的所有订单*/String sql = "select * from orders where uid=?";List<Order> orderList = qr.query(sql, new BeanListHandler<Order>(Order.class), uid);/** 2. 循环遍历每个Order，为其加载它自己所有的订单条目*/for(Order order : orderList) {loadOrderItems(order);//为order对象添加它的所有订单条目}/** 3. 返回订单列表*/return orderList;} catch(SQLException e) {throw new RuntimeException(e);}}/*** 加载指定的订单所有的订单条目* @param order* @throws SQLException */private void loadOrderItems(Order order) throws SQLException {/** 查询两张表：orderitem、book*/String sql = "select * from orderitem i, book b where i.bid=b.bid and oid=?";/** 因为一行结果集对应的不再是一个javabean，所以不能再使用BeanListHandler，而是MapListHandler*/List<Map<String,Object>> mapList = qr.query(sql, new MapListHandler(), order.getOid());/** mapList是多个map，每个map对应一行结果集* 一行：* {iid=C7AD5492F27D492189105FB50E55CBB6, count=2, subtotal=60.0, oid=1AE8A70354C947F8B81B80ADA6783155, bid=7, bname=精通Hibernate,price=30.0, author=张卫琴, image=book_img/8991366-1_l.jpg, cid=2}* ...* * 我们需要使用一个Map生成两个对象：OrderItem、Book，然后再建立两者的关系（把Book设置给OrderItem）*//** 循环遍历每个Map，使用map生成两个对象，然后建立关系（最终结果一个OrderItem），把OrderItem保存起来*/List<OrderItem> orderItemList = toOrderItemList(mapList);order.setOrderItemList(orderItemList);}/*** 把mapList中每个Map转换成两个对象，并建立关系* @param mapList* @return*/private List<OrderItem> toOrderItemList(List<Map<String, Object>> mapList) {List<OrderItem> orderItemList = new ArrayList<OrderItem>();for(Map<String,Object> map : mapList) {OrderItem item = toOrderItem(map);orderItemList.add(item);}return orderItemList;}/*** 把一个Map转换成一个OrderItem对象* @param map* @return*/private OrderItem toOrderItem(Map<String, Object> map) {OrderItem orderItem = CommonUtils.toBean(map, OrderItem.class);Book book = CommonUtils.toBean(map, Book.class);orderItem.setBook(book);return orderItem;}/*** 加载订单* @param oid* @return*/public Order load(String oid) {try {/** 1. 得到当前用户的所有订单*/String sql = "select * from orders where oid=?";Order order = qr.query(sql, new BeanHandler<Order>(Order.class), oid);/** 2. 为order加载它的所有条目*/loadOrderItems(order);/** 3. 返回订单列表*/return order;} catch(SQLException e) {throw new RuntimeException(e);}}/*** 通过oid查询订单状态* @param oid* @return*/public int getStateByOid(String oid) {try {String sql = "select state from orders where oid=?";return (Integer)qr.query(sql, new ScalarHandler(), oid);} catch(SQLException e) {throw new RuntimeException(e);}}/*** 修改订单状态* @param oid* @param state* @return*/public void updateState(String oid, int state) {try {String sql = "update orders set state=? where oid=?";qr.update(sql, state, oid);} catch(SQLException e) {throw new RuntimeException(e);}} } public class OrderService {private OrderDao orderDao = new OrderDao();/*** 支付方法* @param oid*/public void zhiFu(String oid) {/** 1. 获取订单的状态* * 如果状态为1，那么执行下面代码* * 如果状态不为1，那么本方法什么都不做*/int state = orderDao.getStateByOid(oid);if(state == 1) {// 修改订单状态为2orderDao.updateState(oid, 2);}}/*** 添加订单* 需要处理事务* @param order*/public void add(Order order) {try {// 开启事务JdbcUtils.beginTransaction();orderDao.addOrder(order);//插入订单orderDao.addOrderItemList(order.getOrderItemList());//插入订单中的所有条目// 提交事务JdbcUtils.commitTransaction();} catch(Exception e) {// 回滚事务try {JdbcUtils.rollbackTransaction();} catch (SQLException e1) {}throw new RuntimeException(e);}}/*** 我的订单* @param uid* @return*/public List<Order> myOrders(String uid) {return orderDao.findByUid(uid);}/*** 加载订单* @param oid* @return*/public Order load(String oid) {return orderDao.load(oid);}/*** 确认收货* @param oid* @throws OrderException*/public void confirm(String oid) throws OrderException {/** 1. 校验订单状态，如果不是3，抛出异常*/int state = orderDao.getStateByOid(oid);//获取订单状态if(state != 3) throw new OrderException("订单确认失败，您不是什么好东西！");/** 2. 修改订单状态为4，表示交易成功*/orderDao.updateState(oid, 4);} } public class OrderServlet extends BaseServlet {private OrderService orderService = new OrderService();/*** 支付之去银行* * @param request* @param response* @return* @throws ServletException* @throws IOException*/public String zhiFu(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {Properties props = new Properties();InputStream input = this.getClass().getClassLoader().getResourceAsStream("merchantInfo.properties");props.load(input);/** 准备13参数*/String p0_Cmd = "Buy";String p1_MerId = props.getProperty("p1_MerId");String p2_Order = request.getParameter("oid");String p3_Amt = "0.01";String p4_Cur = "CNY";String p5_Pid = "";String p6_Pcat = "";String p7_Pdesc = "";String p8_Url = props.getProperty("p8_Url");String p9_SAF = "";String pa_MP = "";String pd_FrpId = request.getParameter("pd_FrpId");String pr_NeedResponse = "1";/** 计算hmac*/String keyValue = props.getProperty("keyValue");String hmac = PaymentUtil.buildHmac(p0_Cmd, p1_MerId, p2_Order, p3_Amt,p4_Cur, p5_Pid, p6_Pcat, p7_Pdesc, p8_Url, p9_SAF, pa_MP,pd_FrpId, pr_NeedResponse, keyValue);/** 连接易宝的网址和13+1个参数*/StringBuilder url = new StringBuilder(props.getProperty("url"));url.append("?p0_Cmd=").append(p0_Cmd);url.append("&p1_MerId=").append(p1_MerId);url.append("&p2_Order=").append(p2_Order);url.append("&p3_Amt=").append(p3_Amt);url.append("&p4_Cur=").append(p4_Cur);url.append("&p5_Pid=").append(p5_Pid);url.append("&p6_Pcat=").append(p6_Pcat);url.append("&p7_Pdesc=").append(p7_Pdesc);url.append("&p8_Url=").append(p8_Url);url.append("&p9_SAF=").append(p9_SAF);url.append("&pa_MP=").append(pa_MP);url.append("&pd_FrpId=").append(pd_FrpId);url.append("&pr_NeedResponse=").append(pr_NeedResponse);url.append("&hmac=").append(hmac);System.out.println(url);/** 重定向到易宝*/response.sendRedirect(url.toString());return null;}/*** 这个方法是易宝回调方法 我们必须要判断调用本方法的是不是易宝！* * @param request* @param response* @return* @throws ServletException* @throws IOException*/public String back(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {/** 1. 获取11 + 1*/String p1_MerId = request.getParameter("p1_MerId");String r0_Cmd = request.getParameter("r0_Cmd");String r1_Code = request.getParameter("r1_Code");String r2_TrxId = request.getParameter("r2_TrxId");String r3_Amt = request.getParameter("r3_Amt");String r4_Cur = request.getParameter("r4_Cur");String r5_Pid = request.getParameter("r5_Pid");String r6_Order = request.getParameter("r6_Order");String r7_Uid = request.getParameter("r7_Uid");String r8_MP = request.getParameter("r8_MP");String r9_BType = request.getParameter("r9_BType");String hmac = request.getParameter("hmac");/** 2. 校验访问者是否为易宝！*/Properties props = new Properties();InputStream input = this.getClass().getClassLoader().getResourceAsStream("merchantInfo.properties");props.load(input);String keyValue = props.getProperty("keyValue");boolean bool = PaymentUtil.verifyCallback(hmac, p1_MerId, r0_Cmd,r1_Code, r2_TrxId, r3_Amt, r4_Cur, r5_Pid, r6_Order, r7_Uid,r8_MP, r9_BType, keyValue);if(!bool) {//如果校验失败request.setAttribute("msg", "您不是什么好东西！");return "f:/jsps/msg.jsp";}/** 3. 获取状态订单，确定是否要修改订单状态，以及添加积分等业务操作*/orderService.zhiFu(r6_Order);//有可能对数据库进行操作，也可能不操作！/** 4. 判断当前回调方式* 如果为点对点，需要回馈以success开头的字符串*/if(r9_BType.equals("2")) {response.getWriter().print("success");}/** 5. 保存成功信息，转发到msg.jsp*/request.setAttribute("msg", "支付成功！等待卖家发货！你慢慢等~");return "f:/jsps/msg.jsp";}/*** 确认收货* * @param request* @param response* @return* @throws ServletException* @throws IOException*/public String confirm(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {/** 1. 获取oid参数 2. 调用service方法 > 如果有异常，保存异常信息，转发到msg.jsp 3.* 保存成功信息，转发到msg.jsp*/String oid = request.getParameter("oid");try {orderService.confirm(oid);request.setAttribute("msg", "恭喜，交易成功！");} catch (OrderException e) {request.setAttribute("msg", e.getMessage());}return "f:/jsps/msg.jsp";}/*** 加载订单* * @param request* @param response* @return* @throws ServletException* @throws IOException*/public String load(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {/** 1. 得到oid参数 2. 使用oid调用service方法得到Order 3.* 保存到request域，转发到/jsps/order/desc.jsp*/request.setAttribute("order",orderService.load(request.getParameter("oid")));return "f:/jsps/order/desc.jsp";}/*** 我的订单* * @param request* @param response* @return* @throws ServletException* @throws IOException*/public String myOrders(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {/** 1. 从session得到当前用户，再获取其uid 2.* 使用uid调用orderService#myOrders(uid)得到该用户的所有订单List<Order> 3.* 把订单列表保存到request域中，转发到/jsps/order/list.jsp*/User user = (User) request.getSession().getAttribute("session_user");List<Order> orderList = orderService.myOrders(user.getUid());request.setAttribute("orderList", orderList);return "f:/jsps/order/list.jsp";}/*** 添加订单 把session中的车用来生成Order对象* * @param request* @param response* @return* @throws ServletException* @throws IOException*/public String add(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {/** 1. 从session中得到cart 2. 使用cart生成Order对象 3. 调用service方法完成添加订单 4.* 保存order到request域中，转发到/jsps/order/desc.jsp*/// 从session中获取cartCart cart = (Cart) request.getSession().getAttribute("cart");// 把cart转换成Order对象/** 创建Order对象，并设置属性* * Cart --> Order*/Order order = new Order();order.setOid(CommonUtils.uuid());// 设置编号order.setOrdertime(new Date());// 设置下单时间order.setState(1);// 设置订单状态为1，表示未付款User user = (User) request.getSession().getAttribute("session_user");order.setOwner(user);// 设置订单所有者order.setTotal(cart.getTotal());// 设置订单的合计，从cart中获取合计/** 创建订单条目集合* * cartItemList --> orderItemList*/List<OrderItem> orderItemList = new ArrayList<OrderItem>();// 循环遍历Cart中的所有CartItem，使用每一个CartItem对象创建OrderItem对象，并添加到集合中for (CartItem cartItem : cart.getCartItems()) {OrderItem oi = new OrderItem();// 创建订单条目oi.setIid(CommonUtils.uuid());// 设置条目的idoi.setCount(cartItem.getCount());// 设置条目的数量oi.setBook(cartItem.getBook());// 设置条目的图书oi.setSubtotal(cartItem.getSubtotal());// 设置条目的小计oi.setOrder(order);// 设置所属订单orderItemList.add(oi);// 把订单条目添加到集合中}// 把所有的订单条目添加到订单中order.setOrderItemList(orderItemList);// 清空购物车cart.clear();// /** 3. 调用orderService添加订单*/orderService.add(order);/** 4. 保存order到request域，转发到/jsps/order/desc.jsp*/request.setAttribute("order", order);return "/jsps/order/desc.jsp";} }

2、生成订单

3、我的订单（按用户查）

4、加载订单（按id查）

5、确认收货

总结

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