网上图书商城9--支付模块

public String paymentPre(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
	req.setAttribute("order", orderService.load(req.getParameter("oid")));
	return "f:/jsps/order/pay.jsp";
}

public String payment(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
	Properties props = new Properties();
	props.load(this.getClass().getClassLoader().getResourceAsStream("payment.properties"));
	/*
	 * 1. 准备13个参数
	 */
	String p0_Cmd = "Buy";//业务类型，固定值Buy
	String p1_MerId = props.getProperty("p1_MerId");//商号编码，在易宝的唯一标识
	String p2_Order = req.getParameter("oid");//订单编码
	String p3_Amt = "0.01";//支付金额
	String p4_Cur = "CNY";//交易币种，固定值CNY
	String p5_Pid = "";//商品名称
	String p6_Pcat = "";//商品种类
	String p7_Pdesc = "";//商品描述
	String p8_Url = props.getProperty("p8_Url");//在支付成功后，易宝会访问这个地址。
	String p9_SAF = "";//送货地址
	String pa_MP = "";//扩展信息
	String pd_FrpId = req.getParameter("yh");//支付通道
	String pr_NeedResponse = "1";//应答机制，固定值1
	
	/*
	 * 2. 计算hmac
	 * 需要13个参数
	 * 需要keyValue
	 * 需要加密算法
	 */
	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);
	
	/*
	 * 3. 重定向到易宝的支付网关
	 */
	StringBuilder sb = new StringBuilder("https://www.yeepay.com/app-merchant-proxy/node");
	sb.append("?").append("p0_Cmd=").append(p0_Cmd);
	sb.append("&").append("p1_MerId=").append(p1_MerId);
	sb.append("&").append("p2_Order=").append(p2_Order);
	sb.append("&").append("p3_Amt=").append(p3_Amt);
	sb.append("&").append("p4_Cur=").append(p4_Cur);
	sb.append("&").append("p5_Pid=").append(p5_Pid);
	sb.append("&").append("p6_Pcat=").append(p6_Pcat);
	sb.append("&").append("p7_Pdesc=").append(p7_Pdesc);
	sb.append("&").append("p8_Url=").append(p8_Url);
	sb.append("&").append("p9_SAF=").append(p9_SAF);
	sb.append("&").append("pa_MP=").append(pa_MP);
	sb.append("&").append("pd_FrpId=").append(pd_FrpId);
	sb.append("&").append("pr_NeedResponse=").append(pr_NeedResponse);
	sb.append("&").append("hmac=").append(hmac);
	
	resp.sendRedirect(sb.toString());
	return null;
}

public String back(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
	/*
	 * 1. 获取12个参数
	 */
	String p1_MerId = req.getParameter("p1_MerId");
	String r0_Cmd = req.getParameter("r0_Cmd");
	String r1_Code = req.getParameter("r1_Code");
	String r2_TrxId = req.getParameter("r2_TrxId");
	String r3_Amt = req.getParameter("r3_Amt");
	String r4_Cur = req.getParameter("r4_Cur");
	String r5_Pid = req.getParameter("r5_Pid");
	String r6_Order = req.getParameter("r6_Order");
	String r7_Uid = req.getParameter("r7_Uid");
	String r8_MP = req.getParameter("r8_MP");
	String r9_BType = req.getParameter("r9_BType");
	String hmac = req.getParameter("hmac");
	/*
	 * 2. 获取keyValue
	 */
	Properties props = new Properties();
	props.load(this.getClass().getClassLoader().getResourceAsStream("payment.properties"));
	String keyValue = props.getProperty("keyValue");
	/*
	 * 3. 调用PaymentUtil的校验方法来校验调用者的身份
	 *   >如果校验失败：保存错误信息，转发到msg.jsp
	 *   >如果校验通过：
	 *     * 判断访问的方法是重定向还是点对点，如果要是重定向
	 *     修改订单状态，保存成功信息，转发到msg.jsp
	 *     * 如果是点对点：修改订单状态，返回success
	 */
	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) {
		req.setAttribute("code", "error");
		req.setAttribute("msg", "无效的签名，支付失败！（你不是好人）");
		return "f:/jsps/msg.jsp";
	}
	if(r1_Code.equals("1")) {
		orderService.updateStatus(r6_Order, 2);
		if(r9_BType.equals("1")) {
			req.setAttribute("code", "success");
			req.setAttribute("msg", "恭喜，支付成功！");
			return "f:/jsps/msg.jsp";				
		} else if(r9_BType.equals("2")) {
			resp.getWriter().print("success");
		}
	}
	return null;
}

  
    

	支付金额：¥${order.total }
	编号：${order.oid }

选择网上银行

下一步

p1_MerId=10001126856
keyValue=69cl522AV6q613Ii4W6u8K6XuW8vM1N6bFgyv769220IuYe9u37N4y7rI4Pl
p8_Url=http\://localhost\:8080/goods/OrderServlet?method\=back