支付宝接口实现

 * 将订单提交支付宝进行网上支付
 */
public ActionForward submitAlipayUrl(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
    String orderNo = request.getParameter("orderNo");//订单编号
    HashMap hm = new HashMap();
    hm.put("_input_charset", "utf-8");// 采用相同的编码方式
    hm.put("body", "企鹅个性化图书订单，订单号：" + orderNo);// 填写在跳到支付宝页面上显示的付款内容信息
    hm.put("notify_url", "http://127.0.0.1:8888/mypenguin/orders.do?method=AlipayNotify");// 客户付款后,支付宝调用的页面
    hm.put("out_trade_no", orderNo);// 外部交易号,最好具有唯一性,在获取支付宝发来的付款信息时使用.
    hm.put("partner", "2088002302055380");// partnerId(合作伙伴ID)
    //hm.put("agent", "2088002302055380");// partnerId(合作伙伴ID)
    hm.put("payment_type", "1");// 支付类型 1=商品购买,2=服务购买,...
    //hm.put("price", "178.00");// 订单金额信息
    hm.put("total_fee", "178.00");// 订单金额和信息
    //hm.put("quantity", "1");// 订单商品数量,一般都是写1,它是按照整个订单包来计算

hm.put("return_url", "http://127.0.0.1:8888/mypenguin/orders.do?method=AlipayReturn");// 客户付款成功后,显示给客户的页面 hm.put("show_url", "http://127.0.0.1:8888/mypenguin/books.do?method=list&kindId=1");//展示地址，即在支付页面时，商品名称旁边的“详情”的链接地址。 hm.put("seller_email", "[email protected]");// 你的支付宝账户email hm.put("service", "create_direct_pay_by_user");// create_direct_pay_by_user=直接付款,trade_create_by_buyer=担保付款 hm.put("subject", "企鹅个性化图书订单号：" + orderNo);// 填写在跳到支付宝页面上显示的付款标题信息 String payGateway = "https://www.alipay.com/cooperate/gateway.do";// 跳转到支付宝的url头 String securityCode="7nj9sczcnfc4n8366j46mrzsbqjksmzn";//securityCode(安全码); String sign = makeUrl(hm,securityCode,"utf-8",payGateway);//securityCode(安全码); hm.put("sign", sign); hm.put("sign_type", "MD5"); PrintWriter out = response.getWriter();

    out.println("<form name='alipaysubmit' method='post'  action='https://www.alipay.com/cooperate/gateway.do?_input_charset=utf-8' >");
    out.println("<input type='hidden' name='service' value='" + hm.get("service") + "'>");
    out.println("<input type='hidden' name='partner' value='" + hm.get("partner") + "'>");
    out.println("<input type='hidden' name='seller_email' value='" + hm.get("seller_email") + "'>");

out.println("<input type='hidden' name='out_trade_no' value='" + hm.get("out_trade_no") + "'>"); out.println("<input type='hidden' name='subject' value='" + hm.get("subject") + "'>"); out.println("<input type='hidden' name='body' value='" + hm.get("body") + "'>"); out.println("<input type='hidden' name='total_fee' value='" + hm.get("total_fee") + "'>"); out.println("<input type='hidden' name='show_url' value='" + hm.get("show_url") + "'>"); out.println("<input type='hidden' name='return_url' value='" + hm.get("return_url") + "'>"); out.println("<input type='hidden' name='notify_url' value='" + hm.get("notify_url") + "'>"); out.println("<input type='hidden' name='payment_type' value='1'>"); out.println("<input type='hidden' name='sign' value='" + hm.get("sign") + "'>"); out.println("<input type='hidden' name='sign_type' value='" + hm.get("sign_type") + "'>"); out.println("</form>"); out.println("<script>"); out.println(" document.alipaysubmit.submit()"); out.println("</script>"); return null; }

/**

      * 根据传入的参数生成Alipay的支付URL
      * @param hm 参数值
      * @param securityCode 安全码
      * @param charset 编码
      * @param payGateway 支付宝gateway

@return

    */ 
   public static String makeUrl(HashMap hm,String securityCode,String charSet,String payGateway) throws Exception{ 
       List keys = new ArrayList(hm.keySet()); 
       Collections.sort(keys);//支付宝要求参数必须按字母排序 
       StringBuffer content = new StringBuffer(); 
       for (int i = 0; i < keys.size(); i++) { 
           content.append((String) keys.get(i)); 
           content.append("="); 
           content.append((String) hm.get((String) keys.get(i))); 
           if (i != keys.size() - 1) { 
               content.append("&"); 
           } 
       }
       content.append(securityCode);   
       String sign = DataUtil.MD5Encode(content.toString(), charSet);  //MD5加密
       return sign; 
   }

2、return_url的内容： /**

 * 支付宝支付完成以后，当前窗口会从支付宝的页面跳转回这个页面。该页面称作“返回页”，
 * 是同步被支付宝服务器所调用，可当作是支付完成后的提示信息页，如“您的某某某订单，多少金额已支付成功”。

*/ public ActionForward AlipayReturn(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { String alipayNotifyURL = "https://www.alipay.com/cooperate/gateway.do?service=notify_verify"; //String alipayNotifyURL = "http://notify.alipay.com/trade/notify_query.do?";//此路径是在上面链接地址无法起作用时替换使用。alipayNotifyURL = alipayNotifyURL+ "&partner=2088002302055380&notify_id="+ request.getParameter("notify_id"); // 获取支付宝ATN返回结果，true是正确的订单信息，false 是无效的 String responseTxt = check(alipayNotifyURL); // 获得POST 过来参数设置到新的requestParams中 Map requestParams = request.getParameterMap(); List keys = new ArrayList(requestParams.keySet()); Collections.sort(keys); StringBuffer content = new StringBuffer(); for (int i = 0; i < keys.size(); i++) { String key=(String) keys.get(i); if(!key.equals("")&&!key.equals("sign")&&!key.equals("sign_type")){ content.append((String) keys.get(i)); content.append("="); content.append((String)requestParams.get((String) keys.get(i))); if (i != keys.size() - 1) { content.append("&");
} } } String securityCode="7nj9sczcnfc4n8366j46mrzsbqjksmzn";//securityCode(安全码); content.append(securityCode); String mysign = DataUtil.MD5Encode(content.toString(), "utf-8"); System.out.println("--------------------------content="+content); System.out.println("--------------------------mysign="+mysign); System.out.println("--------------------------sign="+request.getParameter("sign")); if (mysign.equals(request.getParameter("sign")) && responseTxt.equals("true") ){ if (request.getParameter("trade_status").equalsIgnoreCase("TRADE_FINISHED")){ // 可以做重定向，也可以用来虚拟物品发货 } return mapping.findForward("payOK");//交易成功 }else{ return mapping.findForward("payFail");//交易失败 } }

3、notify_url的内容： /**

 * 通知返回URL,仅适用于异步返回处理结果的接口。有些服务是无法立即返回处理结果的，那么需要通过这个URL将处理结果异步返回给合作伙伴

*/ public ActionForward AlipayNotify(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { String alipayNotifyURL = "https://www.alipay.com/cooperate/gateway.do?service=notify_verify"; //String alipayNotifyURL = "http://notify.alipay.com/trade/notify_query.do?";//此路径是在上面链接地址无法起作用时替换使用。alipayNotifyURL = alipayNotifyURL+ "&partner=2088002302055380&notify_id="+ request.getParameter("notify_id"); // 获取支付宝ATN返回结果，true是正确的订单信息，false 是无效的 String responseTxt = check(alipayNotifyURL); // 获得POST 过来参数设置到新的requestParams中 Map requestParams = request.getParameterMap(); List keys = new ArrayList(requestParams.keySet()); Collections.sort(keys); StringBuffer content = new StringBuffer(); for (int i = 0; i < keys.size(); i++) { String key=(String) keys.get(i); if(!key.equals("")&&!key.equals("sign")&&!key.equals("sign_type")){ content.append((String) keys.get(i)); content.append("=");
content.append((String)requestParams.get((String) keys.get(i))); if (i != keys.size() - 1) { content.append("&"); } } } String securityCode="7nj9sczcnfc4n8366j46mrzsbqjksmzn";//securityCode(安全码); content.append(securityCode); String mysign = DataUtil.MD5Encode(content.toString(), "utf-8"); System.out.println("--------------------------content="+content); System.out.println("--------------------------mysign="+mysign); System.out.println("--------------------------sign="+request.getParameter("sign")); if (mysign.equals(request.getParameter("sign")) && responseTxt.equals("true") ){ if (request.getParameter("trade_status").equalsIgnoreCase("TRADE_FINISHED")){ // 可以做重定向，也可以用来虚拟物品发货 } return mapping.findForward("payOK"); }else{ return mapping.findForward("payFail"); } }

/**

@param myUrl *
- @param url *
- @return 获取url内容 */ public static String check(String urlvalue ) {
String inputLine = ""; try { URL url = new URL(urlvalue); HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();

BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));

String stTemp = "";
```
 while((stTemp = in.readLine()) != null)
 {
    System.out.println(stTemp);
    inputLine = inputLine + stTemp;
 }
```
} catch(Exception e) { e.printStackTrace(); } return inputLine; } 代码编写完毕，可以试着debug调试一下

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