springboot使用com.github.binarywang包实现微信网页上的支付和退款

 		<dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-pay</artifactId>
            <version>4.1.0</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
       </dependency>

wxpay:
  appId: appId
  mchId: mchId
  mchKey: mchKey
  keyPath: /home/wxpay_cert/apiclient_cert.p12
  privateKeyPath: /home/wxpay_cert/apiclient_key.pem
  privateCertPath: /home/wxpay_cert/apiclient_cert.pem

  notifyUrl: notifyUrl
  refundNotifyUrl: refundNotifyUrl
  serialNo: serialNo

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;

@Data
@ConfigurationProperties(prefix = "wxpay")
public class WechatPayConfig {
    private String appId;
    private String mchId;
    private String mchKey;
    private String keyPath;
    private String privateKeyPath;
    private String privateCertPath;
    private String notifyUrl;

    private String redUrl;
    private String refundNotifyUrl;

    private String serialNo;
}

public class IpUtils
{
       public static String getIpAddr()
    {
        return getIpAddr(ServletUtils.getRequest());
    }
    }

   public static HttpServletRequest getRequest()
    {
        try
        {
            return getRequestAttributes().getRequest();
        }
        catch (Exception e)
        {
            return null;
        }
    }
    
       public static ServletRequestAttributes getRequestAttributes()
    {
        try
        {
            RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
            return (ServletRequestAttributes) attributes;
        }
        catch (Exception e)
        {
            return null;
        }
    }

@Service
@ConditionalOnClass(WxPayService.class)
@EnableConfigurationProperties(WechatPayConfig.class)
@AllArgsConstructor
public class WechatPayService {
	 static Logger logger = LoggerFactory.getLogger(WechatPayService.class);
	 private WechatPayConfig wechatPayConfig;
	     public WxPayService wxPayService() {
        WxPayConfig payConfig = new WxPayConfig();
        payConfig.setAppId(wechatPayConfig.getAppId());
        payConfig.setMchId(wechatPayConfig.getMchId());
        payConfig.setMchKey(wechatPayConfig.getMchKey());
        payConfig.setApiV3Key(wechatPayConfig.getMchKey());
        payConfig.setKeyPath(wechatPayConfig.getKeyPath());
        payConfig.setUseSandboxEnv(false);

        logger.info("wechatPayConfig.getPrivateKeyPath()：{}",wechatPayConfig.getPrivateKeyPath());
        WxPayService wxPayService = new WxPayServiceImpl();
        wxPayService.setConfig(payConfig); //微信配置信息
        return wxPayService;
    }
	
	//生成支付二维码
	//BookingInfo 是你订单表
	 public String generatePayQrCode(BookingInfo booking, String ip) {
        try {

       
            WxPayService wxPayService = wxPayService();
            WxPayUnifiedOrderRequest orderRequest = new WxPayUnifiedOrderRequest();
            orderRequest.setOutTradeNo(booking.getDisplayNo()); //订单号
            orderRequest.setTotalFee(BigDecimal.valueOf(booking.getDisplayPrice()).multiply(new BigDecimal(100)).intValue()); //金额，转换成分 ，至少支付1分钱
            orderRequest.setSpbillCreateIp(ip);
            orderRequest.setNotifyUrl(wechatPayConfig.getRedUrl());
            orderRequest.setBody("");
            orderRequest.setAttach("");
            orderRequest.setTradeType("NATIVE");//交易类型
            orderRequest.setProductId(booking.getId().toString());

            WxPayNativeOrderResult wxPayNativeOrderResult = (WxPayNativeOrderResult) wxPayService.createOrder(orderRequest);
            return wxPayNativeOrderResult.getCodeUrl();
        } catch (Exception e) {
            // 处理异常
            e.printStackTrace();
            return e.getMessage();
        }
    }
	
	//支付回调函数
	 public String payNotify(String xmlData) {
        try {
            WxPayService wxPayService = wxPayService();
            WxPayOrderNotifyResult notifyResult = wxPayService.parseOrderNotifyResult(xmlData);
            String orderId = notifyResult.getOutTradeNo();//拿到订单号获取订单
            logger.info("wechatPayConfig.rePayNotify()：{}", xmlData);
          	
          	//处理的业务
          	//因为会重复调用，如果你这里是钱包这种，那么一定要判断是否支付过了


            return WxPayNotifyResponse.success("成功_" + orderInfo.getId());
        } catch (WxPayException e) {
            e.printStackTrace();
            return WxPayNotifyResponse.fail(e.getMessage());
        }
    }

	//退款订单请求
	//RefundInfo 退款的订单，这里单笔订单，如果是多笔，你可以构建list 要循环执行
	//RefundInfo 中需要包括 支付订单的订单号、支付金额、退款的订单号、退款金额
	  public String redRefundPay(RefundInfo refund){
        try {
            if (refund == null) {
                return "订单获取失败";
            }
            WxPayService wxPayService = wxPayService();
            WxPayRefundRequest orderRequest = new WxPayRefundRequest();
            orderRequest.setOutTradeNo(refund.getDisplayNo());
            orderRequest.setNotifyUrl(wechatPayConfig.getRefundNotifyUrl());
            orderRequest.setTotalFee(BigDecimal.valueOf(refund.getDisplaySum()).multiply(new BigDecimal(100)).intValue());
            orderRequest.setRefundFee(BigDecimal.valueOf(refund.getDisplayPrice()).multiply(new BigDecimal(100)).intValue());
            orderRequest.setOutRefundNo(memberRedRefund.getDisplayNo());

            WxPayRefundResult wxPayRefundResult = wxPayService.refund(orderRequest);

            if ("SUCCESS".equals(wxPayRefundResult.getReturnCode())
                    && "SUCCESS".equals(wxPayRefundResult.getResultCode())) {
                /**
                 * 系统内部业务逻辑
                 */
               
                logger.info("wechatPayConfig.redRefundNotify()：{}", refund.toString());
                
                return "退款中";
            }
            return "退款失败";


        } catch (Exception e) {
            // 处理异常
            e.printStackTrace();
            return e.getMessage();
        }
    }

	//退款回调函数
	 public String redRefundNotify(String xmlData) {
        try {
            WxPayService wxPayService = wxPayService();
            WxPayRefundNotifyResult notifyResult = wxPayService.parseRefundNotifyResult(xmlData);
            String orderId = notifyResult.getReqInfo().getOutRefundNo();//拿到订单号获取订单

            logger.info("wechatPayConfig.redRefundNotify()：{}", xmlData);
            //编写自己的业务处理逻辑


            return WxPayNotifyResponse.success("成功_" + orderInfo.getId());
        } catch (WxPayException e) {
            e.printStackTrace();
            return WxPayNotifyResponse.fail(e.getMessage());
        }
    }
}