支付寶支付之網頁支付

1.支付寶網頁支付講道理很簡單，若是下載的sdk管用的話（沒錯，我使用下載的sdk，官方給出的JAVA版資源，sdk1.5，到了最終也沒能把支付完成，能夠吊起支付寶，可是一直提示ALI38173，頭疼了老久），基本配置就很少少了，按照官方給出的配置流程，完成基本配置，若有不懂，可參考上篇支付寶支付之app支付（在個人文章中）。

2.配置完成後直接上核心代碼

@RequestMapping(value = "/alipay/trade")
    public ResponseEntity<String> sendAlipay(HttpServletRequest request, HttpServletResponse httpResponse) throws Exception {
        HttpHeaders responseHeaders = new HttpHeaders();
        responseHeaders.set("Content-Type", "application/json;charset=UTF-8");
        

        String form1="<form id='alipaysubmit' name='alipaysubmit' action='https://openapi.alipay.com/gateway.do?charset=UTF-8' method='POST'><input type='hidden' name='biz_content' value='{\"productCode\":\"QUICK_WAP_PAY\",\"body\":\"支付寶公衆號充值\",\"subject\":\"夢想直播充值\",\"out_trade_no\":\"17021712041001000583\",\"total_amount\":\"0.01\",\"timeout_express\":\"1m\"}'/><input type='hidden' name='app_id' value='2016122004460499'/><input type='hidden' name='version' value='1.0'/><input type='hidden' name='format' value='json'/><input type='hidden' name='sign_type' value='RSA'/><input type='hidden' name='method' value='alipay.trade.wap.pay'/><input type='hidden' name='timestamp' value='2017-02-17 12:04:10'/><input type='hidden' name='alipay_sdk' value='alipay-sdk-php-20161101'/><input type='hidden' name='notify_url' value='http://api.dreamlive.tv/deposit/notify_alipay5'/><input type='hidden' name='return_url' value='http://api.dreamlive.tv/deposit/notify_alipay5'/><input type='hidden' name='charset' value='UTF-8'/><input type='hidden' name='sign' value='fQAs7/QIQqkWf/0Z7IM9mpHNygx8L5Y/fO5n80l8ueHMPOfsRVptZzHbUE+8gSunm1QTc1E3V1TW0+peA6gS580q3FQrq+b2fkcQf2uueTp/xDuI6V7rRcwiwRWNl0PksRQNrCvzHWl7Ll+QOlumGmgbHMNuGLxld+3Cv7ZP4Vw='/><input type='submit' value='ok' style='display:none;''></form><script>document.forms['alipaysubmit'].submit();</script>";

        /**
         * 構造支付參數，form1爲示例表單結構，可直接使用
         * */
        String defort_pay_number="15224441122";
        Map<String, String> keyValues = new HashMap<String, String>();
        String current_time=Utils.getCurrentTime();
        keyValues.put("app_id", PayConfigUtils.getApp_id());
        keyValues.put("method", "alipay.trade.wap.pay");
        keyValues.put("charset", "UTF-8");
        keyValues.put("sign_type", "RSA");
        keyValues.put("version", "1.0");
        keyValues.put("timestamp", current_time);
        keyValues.put("biz_content", "{\"timeout_express\":\"30m\",\"product_code\":\"QUICK_MSECURITY_PAY\",\"total_amount\":\""+price+"\",\"subject\":\""+subject+"\",\"body\":\""+body+"\",\"out_trade_no\":\"" + defort_pay_number +  "\"}");
        keyValues.put("notify_url", PayConfigUtils.getWebUrl()+"alipay/notify");
        keyValues.put("return_url", PayConfigUtils.getWebUrl()+"campaign/76/ddlist");
        String sign=getSign(keyValues,PayConfigUtils.getPrivate_key());

        httpResponse.setContentType("text/html;charset=utf-8");
        String form2="<form id='alipaysubmit' name='alipaysubmit' action='https://openapi.alipay.com/gateway.do?charset=UTF-8' method='POST'>\n" +
                "<input type='hidden' name='biz_content' value='"+keyValues.get("biz_content")+"'/>\n" +
                "<input type='hidden' name='app_id' value='"+PayConfigUtils.getApp_id()+"'/>\n" +
                "<input type='hidden' name='version' value='1.0'/>\n" +
                "<input type='hidden' name='sign_type' value='RSA'/>\n" +
                "<input type='hidden' name='method' value='alipay.trade.wap.pay'/>\n" +
                "<input type='hidden' name='timestamp' value='"+current_time+"'/>\n" +
                "<input type='hidden' name='notify_url' value='"+keyValues.get("notify_url")+"'/>\n" +
                "<input type='hidden' name='return_url' value='"+keyValues.get("return_url")+"'/>\n" +
                "<input type='hidden' name='charset' value='utf-8'/>\n" +
                "<input type='hidden' name='sign' value='"+sign+"'/>\n" +
                "<input type='submit' value='ok' style='display:none;''></form><script>document.forms['alipaysubmit'].submit();</script>";
        httpResponse.getWriter().write(form2);//直接將完整的表單html輸出到頁面
        httpResponse.getWriter().flush();
        
       /* String json="";
        JSONObject result=new JSONObject();
        json = ReturnJsonUtil.returnSuccessJsonString(result, "支付！");
        return new ResponseEntity<String>(json, responseHeaders, HttpStatus.OK);*/

    }
    public static String getSign(Map<String, String> map, String rsaKey) {
        List<String> keys = new ArrayList<String>(map.keySet());
        // key排序
        Collections.sort(keys);

        StringBuilder authInfo = new StringBuilder();
        for (int i = 0; i < keys.size() - 1; i++) {
            String key = keys.get(i);
            String value = map.get(key);
            authInfo.append(buildKeyValue(key, value, false));
            authInfo.append("&");
        }

        String tailKey = keys.get(keys.size() - 1);
        String tailValue = map.get(tailKey);
        authInfo.append(buildKeyValue(tailKey, tailValue, false));

        String oriSign = SignUtils.sign(authInfo.toString(), rsaKey);
        String encodedSign = "";

      /*  try {
            encodedSign = URLEncoder.encode(oriSign, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }*/
        return  oriSign.trim().replace("\n","");
    }
    /**
     * 拼接鍵值對
     *
     * @param key
     * @param value
     * @param isEncode
     * @return
     */
    private static String buildKeyValue(String key, String value, boolean isEncode) {
        StringBuilder sb = new StringBuilder();
        sb.append(key);
        sb.append("=");
        if (isEncode) {
            try {
                sb.append(URLEncoder.encode(value, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                sb.append(value);
            }
        } else {
            sb.append(value);
        }
        return sb.toString();
    }

3.支付寶網頁支付能夠徹底由後臺完成，因此吊起支付寶的工做不須要前臺ajax獲取數據，上面代碼中的api直接請求便可，連接中傳入必要的參數（如支付id，等）（不要使用ajax）！