微信支付-售后退款

PostSale 表

用户Id,订单Id,机器Id,订单,用户备注,机器备注,图片,售后状态

@OneToOne
@JoinColumn(name = "orderId"
,updatable = false
,insertable = false)
private StoreOrder order;

通过注解关联订单Id和订单

private Status  status = Status.CREATED;
public enum Status{
    CREATED, //等待商家处理 - 商家处理中
    CANCELED, //用户取消  - 已取消
    FINISHED, //商家同意售后  - 已完成
    REJECTED  //商家驳回售后  -  已完成
}

枚举类型 enum Status

继承一个通用的BaseEntity,包含自动生成的表Id,
Timestamp类型的时间,通过注解实现正反的序列化

@Id
@GeneratedValue(
    strategy = GenerationType.AUTO
)
protected Integer id;
@CreationTimestamp
@JsonSerialize(
    using = TimestampSerializer.class
)
@JsonDeserialize(
    using = TimestampDeserializer.class
)
@Column(
    updatable = false
)
protected Timestamp createTime;
@UpdateTimestamp
@JsonSerialize(
    using = TimestampSerializer.class
)
@JsonDeserialize(
    using = TimestampDeserializer.class
)
protected Timestamp updateTime;

Controller

@RequestBody 接受传递过来的json实体对象

@PostMapping("/post_sale/refund_order")
public API<PostSale> refundOrder(@RequestBody @Valid PostSale postSale){
    return API.ok(mOrderManageService.refundOrder(postSale));
}

PostSaleService

   public PostSale refundOrder(PostSale postSale) {
    StoreOrder order = orderRepository.findItemById(postSale.getOrderId());
    mPayService.refundOrder(order.getNo(),order.getPrice(),order.getPayMethod());
    postSale.setStatus(PostSale.Status.FINISHED);
    return postSaleRepository.save(postSale);
}

通过postSale实体类中的订单Id查找出订单数据,进行退款操作,退款成功后更改售后状态

PayService

传递订单中的编号,价格,订单支付日志中的支付方式

public void refundOrder(String no, BigDecimal refundPrice, PayLog.PayMethod payMethod) {
  getPayService(payMethod).refundOrder(no,refundPrice);
}

抽出getPayService方法.获得支付类型

public PayService  getPayService(PayLog.PayMethod payMethod){

    if (PayLog.PayMethod.WECHAT.equals(payMethod)){
        return mWechatPayService;
    }
    if (PayLog.PayMethod.ROYAL_PAY.equals(payMethod)){
        return mRoyalPayService;
    }
    APIError.CUSTOM.set(400,"暂不支持该支付方式").expose();
    return null;
}

WechatPayService

申请退款

public void refundOrder(String orderNo,BigDecimal refundPrice) {
        PayLog log = checkIfCanRefund(orderNo);
        WxPayRefundRequest refundQueryRequest = new WxPayRefundRequest();
        refundQueryRequest.setTransactionId(log.getTransactionId());
        refundQueryRequest.setOutRefundNo(generateRefundId());
        refundQueryRequest.setRefundFee(transformPrice(refundPrice));
        refundQueryRequest.setTotalFee(transformPrice(log.getPrice()));
        refundQueryRequest.setNotifyUrl(String.format("http://%s/pay/wechat/%srefund",mBasicConfigService.getConfig().getDomain(),callbackPrefix));
        try {
            WxPayRefundResult data = mWxPayService.refund(refundQueryRequest);
            log.setRefundId(data.getRefundId());
            log.setRefundPrice(refundPrice);
            log.setStatus(PayLog.PayStatus.REFUNDING);
            log.setRefundTransactionId(data.getRefundId());
            log.setRefundApplyTime(new Timestamp(System.currentTimeMillis()));
            mPayLogRepository.save(log);
        } catch (WxPayException e) {
            mLogger.warning("refund apply error:"+e.getMessage());
            APIError.CUSTOM.set(500,"退款失败:"+e.getMessage()).expose();
        }
}

PayLog log = checkIfCanRefund(orderNo); 检查是否可以退款

protected PayLog checkIfCanRefund(String orderNo){
    PayLog log = getPayLog(orderNo);
    if (log == null){
        APIError.CUSTOM.set(404,"订单不存在").expose();
    }
    if (!PayLog.PayStatus.SUCCESS.equals(log.getStatus())){
        APIError.CUSTOM.set(404,"当前订单不可退款").expose();
    }
    return log;

}

WxPayRefundRequest refundQueryRequest = new WxPayRefundRequest();

创建一个微信退款xml实体,满足微信商户申请退款接口中要求的数据

<xml>
<appid>wx2421b1c4370ec43b</appid>
<mch_id>10000100</mch_id>
    <nonce_str>6cefdb308e1e2e8aabd48cf79e546a02</nonce_str> 
   <out_refund_no>1415701182</out_refund_no>
   <out_trade_no>1415757673</out_trade_no>
   <refund_fee>1</refund_fee>
   <total_fee>1</total_fee>
   <transaction_id></transaction_id>
   <sign>FE56DD4AA85C0EECA82C35595A69E153</sign>
</xml>

WxPayRefundRequest 导入jar包
package com.github.binarywang.wxpay.bean.request;

refundQueryRequest.setTransactionId(log.getTransactionId());

通过支付日志获取交易号

设置商户自己内部的退款单号

refundQueryRequest.setOutRefundNo(generateRefundId());

@Override
public String generateRefundId() {
    return UUID.randomUUID().toString().replaceAll("-","");
}

设置退款结果通知url.
refundQueryRequest.setNotifyUrl(String.format(“http://%s/pay/wechat/%srefund",mBasicConfigService.getConfig().getDomain(),callbackPrefix));