網上圖書商城9--支付模塊，網上圖書商城9--

網上圖書商城9--支付模塊，網上圖書商城9--

1.支付准備

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

2.支付方法

public String payment(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
	Properties props = new Properties();
	props.load(this.getClass().getClassLoader().getResourceAsStream("payment.properties"));
	/*
	 * 1. 准備13個參數
	 */
	String p0_Cmd = "Buy";//業務類型，固定值Buy
	String p1_MerId = props.getProperty("p1_MerId");//商號編碼，在易寶的唯一標識
	String p2_Order = req.getParameter("oid");//訂單編碼
	String p3_Amt = "0.01";//支付金額
	String p4_Cur = "CNY";//交易幣種，固定值CNY
	String p5_Pid = "";//商品名稱
	String p6_Pcat = "";//商品種類
	String p7_Pdesc = "";//商品描述
	String p8_Url = props.getProperty("p8_Url");//在支付成功後，易寶會訪問這個地址。
	String p9_SAF = "";//送貨地址
	String pa_MP = "";//擴展信息
	String pd_FrpId = req.getParameter("yh");//支付通道
	String pr_NeedResponse = "1";//應答機制，固定值1
	
	/*
	 * 2. 計算hmac
	 * 需要13個參數
	 * 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. 重定向到易寶的支付網關
	 */
	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;
}

3.回饋方法

當支付成功時，易寶會訪問這裡
用兩種方法訪問：
1. 引導用戶的浏覽器重定向(如果用戶關閉了浏覽器，就不能訪問這裡了)
2. 易寶的服務器會使用點對點通訊的方法訪問這個方法。（必須回饋success，不然易寶服務器會一直調用這個方法）

public String back(HttpServletRequest req, HttpServletResponse resp)
		throws ServletException, IOException {
	/*
	 * 1. 獲取12個參數
	 */
	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. 獲取keyValue
	 */
	Properties props = new Properties();
	props.load(this.getClass().getClassLoader().getResourceAsStream("payment.properties"));
	String keyValue = props.getProperty("keyValue");
	/*
	 * 3. 調用PaymentUtil的校驗方法來校驗調用者的身份
	 *   >如果校驗失敗：保存錯誤信息，轉發到msg.jsp
	 *   >如果校驗通過：
	 *     * 判斷訪問的方法是重定向還是點對點，如果要是重定向
	 *     修改訂單狀態，保存成功信息，轉發到msg.jsp
	 *     * 如果是點對點：修改訂單狀態，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", "無效的簽名，支付失敗！（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;
}

4.pay.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>pay.jsp</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	<link rel="stylesheet" type="text/css" href="<c:url value='/jsps/css/order/pay.css'/>">
	<script type="text/javascript" src="<c:url value='/jquery/jquery-1.5.1.js'/>"></script>

<script type="text/javascript">
$(function() {
	$("img").click(function() {
		$("#" + $(this).attr("name")).attr("checked", true);
	});
});
</script>
  </head>
  
  <body>
<div class="divContent">
	<span class="spanPrice">支付金額：</span><span class="price_t">¥${order.total }</span>
	<span class="spanOid">編號：${order.oid }</span>
</div>
<form action="<c:url value='/OrderServlet'/>" method="post" id="form1" target="_top">
<input type="hidden" name="method" value="payment"/>
<input type="hidden" name="oid" value="${order.oid }"/>
<div class="divBank">
	<div class="divText">選擇網上銀行</div>
	<div>p1_MerId=10001126856
keyValue=69cl522AV6q613Ii4W6u8K6XuW8vM1N6bFgyv769220IuYe9u37N4y7rI4Pl
p8_Url=http\://localhost\:8080/goods/OrderServlet?method\=back