公众号支付

公众号支付官方文档 微信开发之公众号支付

开发步骤

1. 设置支付目录
2. 设置授权域名
3. 授权获取用户信息(openId未知)
4. 统一下单
5. 微信内H5调起支付
6. 支付结果通知

建议支付目录设置到支付URL上一级目录

开发步骤-官方介绍文档

获取openId

授权获取用户信息官方文档 微信公众号开发之授权获取用户信息

统一下单

调用统一下单接口后生成预付订单 参考公用API

微信内H5调起支付

对生成的预付订单进行二次签名再使用JS API唤起支付 参考公用API

JS部分代码参考-IJPay-Demo

示例代码

https://gitee.com/javen205/IJPay-Demo

Spring Boot版本Demo

    /**
     * 公众号支付
     */
    @RequestMapping(value ="/webPay",method = {RequestMethod.POST,RequestMethod.GET})
    @ResponseBody
    public AjaxResult webPay(HttpServletRequest request,HttpServletResponse response,
            @RequestParam("total_fee") String total_fee) {
        // openId，采用 网页授权获取 access_token API：SnsAccessTokenApi获取

        String openId = (String) request.getSession().getAttribute("openId");

        if (StrKit.isBlank(openId)) {
            result.addError("openId is null");
            return result;
        }
        if (StrKit.isBlank(total_fee)) {
            result.addError("请输入数字金额");
            return result;
        }

        String ip = IpKit.getRealIp(request);
        if (StrKit.isBlank(ip)) {
            ip = "127.0.0.1";
        }

        Map<String, String> params = WxPayApiConfigKit.getWxPayApiConfig()
                .setAttach("IJPay 公众号支付测试  -By Javen")
                .setBody("IJPay 公众号支付测试  -By Javen")
                .setOpenId(openId)
                .setSpbillCreateIp(ip)
                .setTotalFee(total_fee)
                .setTradeType(TradeType.JSAPI)
                .setNotifyUrl(notify_url)
                .setOutTradeNo(String.valueOf(System.currentTimeMillis()))
                .build();

        String xmlResult = WxPayApi.pushOrder(false,params);
log.info(xmlResult);
        Map<String, String> resultMap = PaymentKit.xmlToMap(xmlResult);

        String return_code = resultMap.get("return_code");
        String return_msg = resultMap.get("return_msg");
        if (!PaymentKit.codeIsOK(return_code)) {
            result.addError(return_msg);
            return result;
        }
        String result_code = resultMap.get("result_code");
        if (!PaymentKit.codeIsOK(result_code)) {
            result.addError(return_msg);
            return result;
        }
        // 以下字段在return_code 和result_code都为SUCCESS的时候有返回


        String prepay_id = resultMap.get("prepay_id");

        Map<String, String> packageParams = PaymentKit.prepayIdCreateSign(prepay_id);

        String jsonStr = JSON.toJSONString(packageParams);
        result.success(jsonStr);
        return result;
    }

Jfinal版本Demo

public void webPay() {

        // openId，采用 网页授权获取 access_token API：SnsAccessTokenApi获取
        String openId = (String) getSession().getAttribute("openId");

        String total_fee=getPara("total_fee");

        if (StrKit.isBlank(openId)) {
            ajax.addError("openId is null");
            renderJson(ajax);
            return;
        }
        if (StrKit.isBlank(total_fee)) {
            ajax.addError("请输入数字金额");
            renderJson(ajax);
            return;
        }

        String ip = IpKit.getRealIp(getRequest());
        if (StrKit.isBlank(ip)) {
            ip = "127.0.0.1";
        }

        Map<String, String> params = WxPayApiConfigKit.getWxPayApiConfig()
                .setAttach("IJPay 公众号支付测试  -By Javen")
                .setBody("IJPay 公众号支付测试  -By Javen")
                .setOpenId(openId)
                .setSpbillCreateIp(ip)
                .setTotalFee(total_fee)
                .setTradeType(TradeType.JSAPI)
                .setNotifyUrl(notify_url)
                .setOutTradeNo(String.valueOf(System.currentTimeMillis()))
                .build();

        String xmlResult = WxPayApi.pushOrder(false,params);
log.info(xmlResult);
        Map<String, String> result = PaymentKit.xmlToMap(xmlResult);

        String return_code = result.get("return_code");
        String return_msg = result.get("return_msg");
        if (!PaymentKit.codeIsOK(return_code)) {
            ajax.addError(return_msg);
            renderJson(ajax);
            return;
        }
        String result_code = result.get("result_code");
        if (!PaymentKit.codeIsOK(result_code)) {
            ajax.addError(return_msg);
            renderJson(ajax);
            return;
        }
        // 以下字段在return_code 和result_code都为SUCCESS的时候有返回
        String prepay_id = result.get("prepay_id");

        Map<String, String> packageParams = PaymentKit.prepayIdCreateSign(prepay_id);

        String jsonStr = JsonKit.toJson(packageParams);
        ajax.success(jsonStr);
        renderJson(ajax);
    }