小程序中的支付以及回调

@ApiOperation(value = "接收微信回调消息")
@PostMapping(value = "receive_notify")
@ResponseBody
public void receiveNotify(HttpServletRequest request, HttpServletResponse response) throws Exception {

    String line = null;
    String xmlString = null;
    BufferedReader reader = request.getReader();
    StringBuffer inputString = new StringBuffer();
    while ((line = reader.readLine()) != null) {
        inputString.append(line);
    }
    xmlString = inputString.toString();
    request.getReader().close();

    log.info("----接收到的数据如下：---" + xmlString);
    String returnXml = payService.receiveNotify(xmlString,(BatteryPay pay)->{
        orderService.paySucc(pay);
    });

    // 处理业务完毕
    BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());
    out.write(returnXml.getBytes());
    out.flush();
    out.close();
}