網(wǎng)上關(guān)于Java支付寶接口的文章很多，都大同小異，但是具體到代碼中，還是不太一樣，對(duì)于以前沒有調(diào)試的新手來說還是很費(fèi)解的，這是通過調(diào)試認(rèn)為比較有用的版本，貼在這里供大家參考。

1、從本站提交到支付寶：

/**
???? * 將訂單提交支付寶進(jìn)行網(wǎng)上支付
???? */
??? public ActionForward submitAlipayUrl(ActionMapping mapping,
??????????? ActionForm form, HttpServletRequest request,
??????????? HttpServletResponse response) throws Exception {
??????? String orderNo = request.getParameter("orderNo");//訂單編號(hào)
??????? HashMap hm = new HashMap();
??????? hm.put("_input_charset", "utf-8");// 采用相同的編碼方式
??????? hm.put("body", "企鵝個(gè)性化圖書訂單，訂單號(hào)：" + orderNo);// 填寫在跳到支付寶頁面上顯示的付款內(nèi)容信息
??????? hm.put("notify_url", "http://127.0.0.1:8888/mypenguin/orders.do?method=AlipayNotify");// 客戶付款后,支付寶調(diào)用的頁面
??????? hm.put("out_trade_no", orderNo);// 外部交易號(hào),最好具有唯一性,在獲取支付寶發(fā)來的付款信息時(shí)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");// 支付類型 1=商品購買,2=服務(wù)購買,...
??????? //hm.put("price", "178.00");// 訂單金額信息
??????? hm.put("total_fee", "178.00");// 訂單金額和信息
??????? //hm.put("quantity", "1");// 訂單商品數(shù)量,一般都是寫1,它是按照整個(gè)訂單包來計(jì)算
??????? hm.put("return_url", "http://127.0.0.1:8888/mypenguin/orders.do?method=AlipayReturn");// 客戶付款成功后,顯示給客戶的頁面
??????? hm.put("show_url", "http://127.0.0.1:8888/mypenguin/books.do?method=list&kindId=1");//展示地址，即在支付頁面時(shí)，商品名稱旁邊的“詳情”的鏈接地址。
??????? hm.put("seller_email", "monicali_7766@sina.com");// 你的支付寶賬戶email
??????? hm.put("service", "create_direct_pay_by_user");// create_direct_pay_by_user=直接付款,trade_create_by_buyer=擔(dān)保付款
??????? hm.put("subject", "企鵝個(gè)性化圖書訂單號(hào)：" + orderNo);// 填寫在跳到支付寶頁面上顯示的付款標(biāo)題信息
??????? String payGateway = "https://www.alipay.com/cooperate/gateway.do";// 跳轉(zhuǎn)到支付寶的url頭
??????? String securityCode="7nj9sczcnfc4n8366j46mrzsbqjksmzn";//securityCode(安全碼);
??????? String sign = makeUrl(hm,securityCode,"utf-8",payGateway);//securityCode(安全碼);
??????? 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;
??? }

/**
????????? * 根據(jù)傳入的參數(shù)生成Alipay的支付URL
????????? * @param hm 參數(shù)值
????????? * @param securityCode 安全碼
????????? * @param charset 編碼
????????? * @param payGateway 支付寶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);//支付寶要求參數(shù)必須按字母排序?
???????????? 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的內(nèi)容：
/**
???? * 支付寶支付完成以后，當(dāng)前窗口會(huì)從支付寶的頁面跳轉(zhuǎn)回這個(gè)頁面。該頁面稱作“返回頁”，
???? * 是同步被支付寶服務(wù)器所調(diào)用，可當(dāng)作是支付完成后的提示信息頁，如“您的某某某訂單，多少金額已支付成功”。
???? */
??? 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?";//此路徑是在上面鏈接地址無法起作用時(shí)替換使用。
??????? alipayNotifyURL = alipayNotifyURL+ "&partner=2088002302055380&notify_id="+ request.getParameter("notify_id");
???? // 獲取支付寶ATN返回結(jié)果，true是正確的訂單信息，false 是無效的
??????? String responseTxt = check(alipayNotifyURL);
??????? // 獲得POST 過來參數(shù)設(shè)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(安全碼);
??????? 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，也可以用來虛擬物品發(fā)貨
???????????????? }
???????????????? return mapping.findForward("payOK");//交易成功
????????? }else{
????????????? return mapping.findForward("payFail");//交易失敗
????????? }
??? }

3、notify_url的內(nèi)容：
/**
???? * 通知返回URL,僅適用于異步返回處理結(jié)果的接口。有些服務(wù)是無法立即返回處理結(jié)果的，那么需要通過這個(gè)URL將處理結(jié)果異步返回給合作伙伴
???? */
??? 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?";//此路徑是在上面鏈接地址無法起作用時(shí)替換使用。
??????? alipayNotifyURL = alipayNotifyURL+ "&partner=2088002302055380&notify_id="+ request.getParameter("notify_id");
???? // 獲取支付寶ATN返回結(jié)果，true是正確的訂單信息，false 是無效的
??????? String responseTxt = check(alipayNotifyURL);
??????? // 獲得POST 過來參數(shù)設(shè)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(安全碼);
??????? 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，也可以用來虛擬物品發(fā)貨
???????????????? }
???????????????? return mapping.findForward("payOK");
????????? }else{
????????????? return mapping.findForward("payFail");
????????? }
??? }

/**
? * @param myUrl
???? *
???? * @param url
???? *
???? * @return 獲取url內(nèi)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;
}

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