支付宝支付之网页支付

1.支付宝网页支付讲道理很简单，如果下载的sdk管用的话（没错，我使用下载的sdk，官方给出的JAVA版资源，sdk1.5，到了最终也没能把支付完成，可以吊起支付宝，但是一直提示ALI38173，头疼了老久），基本配置就不多少了，按照官方给出的配置流程，完成基本配置，如有不懂，可参考上篇支付宝支付之app支付（在我的文章中）。

2.配置完成后直接上核心代码

@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":"支付宝公众号充值","subject":"梦想直播充值","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>";

        /**
         * 构造支付参数，form1为示例表单结构，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'>
" +
                "<input type='hidden' name='biz_content' value='"+keyValues.get("biz_content")+"'/>
" +
                "<input type='hidden' name='app_id' value='"+PayConfigUtils.getApp_id()+"'/>
" +
                "<input type='hidden' name='version' value='1.0'/>
" +
                "<input type='hidden' name='sign_type' value='RSA'/>
" +
                "<input type='hidden' name='method' value='alipay.trade.wap.pay'/>
" +
                "<input type='hidden' name='timestamp' value='"+current_time+"'/>
" +
                "<input type='hidden' name='notify_url' value='"+keyValues.get("notify_url")+"'/>
" +
                "<input type='hidden' name='return_url' value='"+keyValues.get("return_url")+"'/>
" +
                "<input type='hidden' name='charset' value='utf-8'/>
" +
                "<input type='hidden' name='sign' value='"+sign+"'/>
" +
                "<input type='submit' value='ok' style='display:none;''></form><script>document.forms['alipaysubmit'].submit();</script>";
        httpResponse.getWriter().write(form2);//直接将完整的表单html输出到页面
        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("
","");
    }
    /**
     * 拼接键值对
     *
     * @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.支付宝网页支付可以完全由后台完成，所以吊起支付宝的工作不需要前台ajax获取数据，上面代码中的api直接请求即可，链接中传入必要的参数（如支付id，等）（不要使用ajax）！