代码如下

    1. @PostConstruct
    2. public void init() {
    3.   log.info("微信支付初始化 appId={}", appId);
    4.   WxPayService wxPayService = new WxPayServiceImpl();
    6.   WxPayConfig payConfig = new WxPayConfig();
    7.   payConfig.setAppId(appId);
    8.   payConfig.setMchId(mchId);
    9.   payConfig.setMchKey(mchKey);
    10.   // 证书配置
    11.   payConfig.setKeyPath("classpath:cert/apiclient_cert.p12");
    13.   wxPayService.setConfig(payConfig);
    14.   payService = wxPayService;
    16.   log.info("微信支付初始化完毕 ");
    17. }

    退款代码如下

    1. WxPayRefundRequest request = new WxPayRefundRequest();
    2. Integer totalFee = price.multiply(new BigDecimal("100")).intValue();
    3. Integer refundFee = totalFee;
    5. // 订单金额
    6. request.setTotalFee(totalFee);
    7. // 退款金额
    8. request.setRefundFee(refundFee);
    9. // 商户订单号
    10. request.setOutTradeNo(orderNo);
    11. // 商户退款单号
    12. request.setOutRefundNo(refundNo);
    13. // 回调地址
    14. request.setNotifyUrl(WxConstants.notifyUrl);
    16. WxPayService wxPayService = WxPayAutoConfiguration.getWxPayService();
    17. try {
    18.     return wxPayService.refund(request);
    19. } catch (WxPayException e) {
    20.     throw new BusinessException(e.getMessage());
    21. }