JAVA调用支付宝直充接口

逃离我推掉我的手 2022-08-13 12:48 208阅读 0赞

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][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][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URL  
  String return\_url = "http://www/foolpid.net/accountController.do?method=alipayReturn"; // 支付完成后跳转返回的网址URL  
  String 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][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][http_notify.alipay.com_trade_notify_query.do]?"  
    + "&partner="  
    + partner  
    + "&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 = 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！！！

[https_www.alipay.com_cooperate_gateway.do]: https://www.alipay.com/cooperate/gateway.do
[pay_365.com]: mailto:pay@365.com
[https_www.alipay.com_cooperate_gateway.do_input_charset_utf-8]: https://www.alipay.com/cooperate/gateway.do?_input_charset=utf-8
[http_notify.alipay.com_trade_notify_query.do]: http://notify.alipay.com/trade/notify_query.do