关于java:阿里支付开发

gateway:"https://openapi.alipaydev.com/gateway.do"
appId: "这是收款方的 appid，采纳沙箱环境的话就是那个 appid"
privateKey: "利用私钥"
format: "json"
charset: "UTF-8"
publicKey: "支付宝公钥"
signType: "RSA2"
return_url:"示意解决了业务当前胜利跳转的地址"
notify_url:"响应的 url，回调的 controller，必须公网能拜访"

##### 支付宝二维码领取 (可参考官网文档，曾经十分具体)

// 支付宝退款接口，

public static String RefundOrder(TradeRefundVo tradeRefund) throws BizException {
//TradeRefundVo 本人定义的实体类，可依据官网文档的 api 进行封装
    AlipayConfig alipay = AlipayConfig.getInstance();
    // 实例化客户端
    AlipayClient alipayClient = new DefaultAlipayClient(alipay.getGateway(), alipay.getAppId(),
            alipay.getPrivateKey(), alipay.getFormat(),
            alipay.getCharset(), alipay.getPublicKey(), alipay.getSignType());
    AlipayTradeRefundRequest alipayTradeRefundRequest = new AlipayTradeRefundRequest();
    AlipayTradeRefundModel alipayTradeRefundModel = new AlipayTradeRefundModel();
    alipayTradeRefundModel.setOutTradeNo(tradeRefund.getOut_trade_no());
    alipayTradeRefundModel.setRefundAmount(tradeRefund.getRefund_amount());
    alipayTradeRefundModel.setRefundReason(tradeRefund.getTrade_reason());
    alipayTradeRefundRequest.setBizModel(alipayTradeRefundModel);
    try {AlipayTradeRefundResponse response = alipayClient.execute(alipayTradeRefundRequest);
        logger.info("response 申请体的参数为 {}" + response.getBody());
        if (response.isSuccess()) {System.out.println("退款接口调用胜利");
        } else {System.out.println("退款接口调用失败");
        }
        return response.getBody();} catch (AlipayApiException e) {e.printStackTrace();
        logger.info("退款出现异常");
        logger.error(e.getMessage(), e.fillInStackTrace());
        throw new BizException(AlipayException);
    }
}