<c3p0-config>
	<!-- 默認(rèn)配置，只可以出現(xiàn)一次 -->
	<default-config>
		<property name="driverClass">com.mysql.jdbc.Driver</property>
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/cakes?useUnicode=true&amp;characterEncoding=utf-8&amp;useSSL=false</property>
		<property name="user">root</property>
		<property name="password">root</property>
		<property name="initialPoolSize">10</property>
		<property name="maxIdleTime">3600</property>
		<property name="maxPoolSize">20</property>
		<property name="minPoolSize">10</property>
	</default-config>
</c3p0-config>

Servlet類;
@WebServlet(name = "goods_buy",urlPatterns = "/goods_buy")
public class GoodsBuyServlet extends HttpServlet {
    private GoodsService gService = new GoodsService();
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Order o = null;
        if(request.getSession().getAttribute("order") != null) {
            o = (Order) request.getSession().getAttribute("order");
        }else {
            o = new Order();
            request.getSession().setAttribute("order", o);
        }
        int goodsid = Integer.parseInt(request.getParameter("goodsid"));
        Goods goods = gService.getGoodsById(goodsid);
        if(goods.getStock()>0) {
            o.addGoods(goods);
            response.getWriter().print("ok");
        }else {
            response.getWriter().print("fail");
        }
}

@WebServlet(name = "order_confirm",urlPatterns = "/order_confirm")
public class OrderConfirmServlet extends HttpServlet {
    private OrderService oService = new OrderService();
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Order o = (Order) request.getSession().getAttribute("order");
        try {
            BeanUtils.copyProperties(o, request.getParameterMap());
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        o.setDatetime(new Date());
        o.setStatus(2);
        o.setUser((User) request.getSession().getAttribute("user"));
        oService.addOrder(o);
        request.getSession().removeAttribute("order");

        request.setAttribute("msg", "訂單支付成功！");
        request.getRequestDispatcher("/order_success.jsp").forward(request, response);
    }

<div class="cart-items">
		<div class="container">
			<h2>確認(rèn)收貨信息</h2>
			<form class="form-horizontal" action="/order_confirm" method="post" id="payform">
				<div class="row">
					<label class="control-label col-md-1">收貨人</label>
					<div class="col-md-6">
						<input type="text" class="form-control" name="name" value="${user.name }" style="height:auto;padding:10px;" placeholder="輸入收貨人" required="required"><br>
					</div>
				</div>
				<div class="row">
					<label class="control-label col-md-1">收貨電話</label>
					<div class="col-md-6">
						<input type="text" class="form-control" name="phone" value="${user.phone }" style="height:auto;padding:10px;" placeholder="輸入收貨電話" required="required"><br>
					</div>
				</div>
				<div class="row">
					<label class="control-label col-md-1">收貨地址</label>
					<div class="col-md-6">
						<input type="text" class="form-control" name="address" value="${user.address }" style="height:auto;padding:10px;" placeholder="輸入收貨地址" required="required"><br>
					</div>
				</div>

				<br><hr><br>

				<h2>選擇支付方式</h2>
				<h3>支付金額: ${order.total }</h3><br><br>


				<div class="col-sm-6 col-md-4 col-lg-3 ">
					<label>
						<div class="thumbnail">
							<input type="radio" name="paytype" value="1" checked="checked" />
							<img src="images/wechat.jpg" alt="微信支付">
						</div>
					</label>
				</div>
				<div class="col-sm-6 col-md-4 col-lg-3 ">
					<label>
						<div class="thumbnail">
							<input type="radio" name="paytype" value="2"  />
							<img src="images/alipay.jpg" alt="支付寶支付">
						</div>
					</label>
				</div>
				<div class="col-sm-6 col-md-4 col-lg-3 ">
					<label>
						<div class="thumbnail">
							<input type="radio" name="paytype" value="3"  />
							<img src="images/offline.jpg" alt="貨到付款">
						</div>
					</label>
				</div>
				<div class="clearfix"> </div>
				<div class="register-but text-center">
					<input type="submit" value="確認(rèn)訂單">
					<div class="clearfix"> </div>
				</div>
			</form>
		</div>
	</div>