JAVA调用支付宝的直充接口原理和银联接口一样，当商家和支付宝签好协议后就可以问支付宝的人要相关的代码了。我本地用的是支付宝UTF-8编码的代码，先把util里的东西达成一个alipay.jar文件。然后编写我们自己的调用和响应代码：1.封装支付宝需要的接口数据@Description("会员中心资金帐户支付宝充值")@CreatedInfo(creator = "hamano", date = "2008-09-22")public ModelAndView fundsDepositByAliPay(HttpServletRequest request,HttpServletResponse response) {RemindPageUtil remindPageUtil = new RemindPageUtil();Map<String, Object> paraMap = new HashMap<String, Object>();String paygateway = "https://www.alipay.com/cooperate/gateway.do?"; // ‘支付接口String service = "create_direct_pay_by_user";// 快速付款交易服务String sign_type = "MD5";String out_trade_no = SnGenerator.generateUnionPaySn(); // 商户网站订单String input_charset = "utf-8";String key = ""; // 支付宝安全校验码(账户内提取)String partner= ""; // 支付宝合作伙伴id (账户内提取)String body = "商品描述"; // 商品描述，推荐格式：商品名称（订单编号：订单编号）String total_fee ="0.01";// 订单总价String payment_type = "1";// 支付宝类型.1代表商品购买String seller_email = "pay@365.com"; // 卖家支付宝帐户String subject = "商品名称"; // 商品名称String show_url = "http://www/foolpid.net/product/show_product.jsp";//商品显示页String notify_url = "http://www/foolpid.net/accountController.do?method=alipayNotify"; // 通知接收URLString return_url = "http://www/foolpid.net/accountController.do?method=alipayReturn"; // 支付完成后跳转返回的网址URLString ItemUrl = Payment.CreateUrl(paygateway, service, sign_type,out_trade_no, input_charset, partner, key, show_url, body,total_fee, payment_type, seller_email, subject, notify_url,return_url);//支付宝接口用POST传输，所以我自己写了个将GET转为POST的方法，代码在下面的程序中给出HttpClient http=new HttpClient(response);http.setParameter("body",body);http.setParameter("notify_url",notify_url);http.setParameter("out_trade_no",out_trade_no);http.setParameter("partner",partner);http.setParameter("payment_type",payment_type);http.setParameter("return_url",return_url);http.setParameter("seller_email",seller_email);http.setParameter("service",service);http.setParameter("show_url",show_url);http.setParameter("sign",ItemUrl);http.setParameter("sign_type",sign_type);http.setParameter("subject",subject);http.setParameter("total_fee",total_fee);try {http.sendByPost("https://www.alipay.com/cooperate/gateway.do?_input_charset=utf-8");} catch (IOException e) {}return null;}2.根据notify_url的设置响应支付宝接口public ModelAndView alipayNotify(HttpServletRequest request,HttpServletResponse response) throws Exception {RemindPageUtil remindPageUtil = new RemindPageUtil();Map<String, Object> paraMap = new HashMap<String, Object>();String privateKey = ""; // 支付宝安全校验码(账户内提取)String partner= ""; // 支付宝合作伙伴id (账户内提取)
String alipayNotifyURL = "http://notify.alipay.com/trade/notify_query.do?"+ "&partner="+ partner+ "¬ify_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 = CheckURL.check(alipayNotifyURL);
Map params = new HashMap();// 获得POST 过来参数设置到新的params中Map requestParams = request.getParameterMap();for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {String name = (String) iter.next();String[] values = (String[]) requestParams.get(name);String valueStr = "";for (int i = 0; i < values.length; i++) {valueStr = (i == values.length – 1) ? valueStr + values[i]: valueStr + values[i] + ",";}params.put(name, valueStr);}String mysign = com.alipay.util.SignatureHelper.sign(params, privateKey);String orderId=request.getParameter("out_trade_no");String amount=request.getParameter("total_fee");if (mysign.equals(request.getParameter("sign"))&&responseTxt.equals("true")) {if("TRADE_FINISHED".equals(request.getParameter("trade_status"))){return null;}else{System.out.println("支付失败");}} else {System.out.println("支付失败");}return null;}3.return_url的调用和前面一致，用于支付完成后的返回页面附注：将GET转为POST的类public class HttpClient {Map<String, String> parameter=new HashMap<String, String>();HttpServletResponse response;
public HttpClient(HttpServletResponse response){ this.response=response;}public void setParameter(String key,String value){ this.parameter.put(key, value);}public void sendByPost(String url) throws IOException{ this.response.setContentType("text/html"); response.setCharacterEncoding("utf-8"); PrintWriter out = this.response.getWriter(); out.println("<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.01 Transitional//EN/">"); out.println("<HTML>"); out.println(" <HEAD><TITLE>sender</TITLE></HEAD>"); out.println(" <BODY>"); out.println("<form name=/"submitForm/" action=/""+url+"/" method=/"post/">"); Iterator<String> it=this.parameter.keySet().iterator(); while(it.hasNext()) { String key=it.next(); out.println("<input type=/"hidden/" name=/""+key+"/" value=/""+this.parameter.get(key)+"/"/>"); } out.println("</from>"); out.println("<script>window.document.submitForm.submit();</script> "); out.println(" </BODY>"); out.println("</HTML>"); out.flush(); out.close();
}}我 在做程序的时候碰到了一个很怪的现象，在if (mysign.equals(request.getParameter("sign"))&&responseTxt.equals("true")) {}这一句，用jsp页面的时候没有任何问题，但写在类的方法中就会出现mysign和sign不一致的情况，在网上也查过相关资料有的说是编码问题，但 我打印出回调的参数时中文数据都是对的。后来问了支付宝的工作人员，说是key和partner没写，可我写的都对的。最后他们也没给我一个合理的答案， 他们说&&用||代替好了，因为最关键的是下面 if("TRADE_FINISHED".equals(request.getParameter("trade_status"))){}这里的判 断。所以最后我就改成了if (mysign.equals(request.getParameter("sign"))||responseTxt.equals("true")) {}，如果有谁也碰到我一样的情况，请在此留言，告知我一下答案。谢谢！！！
对的，坚持;错的，放弃!
