关于JAVA支付宝接口

网上关于Java支付宝接口的文章很多，都大同小异，但是具体到代码中，还是不太一样，对于以前没有调试的新手来说还是很费解的，这是通过调试认为比较有用的版本，贴在这里供大家参考。

1、从本站提交到支付宝：

/**
     * 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", "[e-mail]");// 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;
}


参考网址：http://www.j2bb.com/trac/discussion/23/953