医保退款通知

1curl -X POST \
2  https://api.mch.weixin.qq.com/v3/med-ins/refunds/notify?mix_trade_no=202204022005169952975171534816 \
3  -H "Authorization: WECHATPAY2-SHA256-RSA2048 mchid=\"1900000001\",..." \
4  -H "Accept: application/json" \
5  -H "Content-Type: application/json" \
6  -d '{
7    "med_refund_total_fee" : 45000,
8    "med_refund_gov_fee" : 45000,
9    "med_refund_self_fee" : 45000,
10    "med_refund_other_fee" : 45000,
11    "refund_time" : "2015-05-20T13:29:35+08:00",
12    "out_refund_no" : "R202204022005169952975171534816"
13  }'
14

1package com.java.demo;
2
3import com.java.utils.WXPayUtility; // 引用微信支付工具库，参考：https://pay.weixin.qq.com/doc/v3/merchant/4014931831
4
5import com.google.gson.annotations.SerializedName;
6import com.google.gson.annotations.Expose;
7import okhttp3.MediaType;
8import okhttp3.OkHttpClient;
9import okhttp3.Request;
10import okhttp3.RequestBody;
11import okhttp3.Response;
12
13import java.io.IOException;
14import java.io.UncheckedIOException;
15import java.security.PrivateKey;
16import java.security.PublicKey;
17import java.util.ArrayList;
18import java.util.HashMap;
19import java.util.List;
20import java.util.Map;
21
22/**
23 * 医保退款通知
24 */
25public class NotifyRefund {
26  private static String HOST = "https://api.mch.weixin.qq.com";
27  private static String METHOD = "POST";
28  private static String PATH = "/v3/med-ins/refunds/notify";
29
30  public static void main(String[] args) {
31    // TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/v3/merchant/4013070756
32    NotifyRefund client = new NotifyRefund(
33      "19xxxxxxxx",                    // 商户号，是由微信支付系统生成并分配给每个商户的唯一标识符，商户号获取方式参考 https://pay.weixin.qq.com/doc/v3/merchant/4013070756
34      "1DDE55AD98Exxxxxxxxxx",         // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/merchant/4013053053
35      "/path/to/apiclient_key.pem",     // 商户API证书私钥文件路径，本地文件路径
36      "PUB_KEY_ID_xxxxxxxxxxxxx",      // 微信支付公钥ID，如何获取请参考 https://pay.weixin.qq.com/doc/v3/merchant/4013038816
37      "/path/to/wxp_pub.pem"           // 微信支付公钥文件路径，本地文件路径
38    );
39
40    NotifyRefundRequest request = new NotifyRefundRequest();
41    request.mixTradeNo = "202204022005169952975171534816";
42    request.medRefundTotalFee = 45000L;
43    request.medRefundGovFee = 45000L;
44    request.medRefundSelfFee = 45000L;
45    request.medRefundOtherFee = 45000L;
46    request.refundTime = "2015-05-20T13:29:35+08:00";
47    request.outRefundNo = "R202204022005169952975171534816";
48    try {
49      client.run(request);
50    } catch (WXPayUtility.ApiException e) {
51        // TODO: 请求失败，根据状态码执行不同的逻辑
52        e.printStackTrace();
53    }
54  }
55
56  public void run(NotifyRefundRequest request) {
57    String uri = PATH;
58    Map<String, Object> args = new HashMap<>();
59    args.put("mix_trade_no", request.mixTradeNo);
60    String queryString = WXPayUtility.urlEncode(args);
61    if (!queryString.isEmpty()) {
62        uri = uri + "?" + queryString;
63    }
64    String reqBody = WXPayUtility.toJson(request);
65
66    Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
67    reqBuilder.addHeader("Accept", "application/json");
68    reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
69    reqBuilder.addHeader("Authorization", WXPayUtility.buildAuthorization(mchid, certificateSerialNo,privateKey, METHOD, uri, reqBody));
70    reqBuilder.addHeader("Content-Type", "application/json");
71    RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqBody);
72    reqBuilder.method(METHOD, requestBody);
73    Request httpRequest = reqBuilder.build();
74
75    // 发送HTTP请求
76    OkHttpClient client = new OkHttpClient.Builder().build();
77    try (Response httpResponse = client.newCall(httpRequest).execute()) {
78      String respBody = WXPayUtility.extractBody(httpResponse);
79      if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
80        // 2XX 成功，验证应答签名
81        WXPayUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey,
82            httpResponse.headers(), respBody);
83
84        return;
85      } else {
86        throw new WXPayUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
87      }
88    } catch (IOException e) {
89      throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
90    }
91  }
92
93  private final String mchid;
94  private final String certificateSerialNo;
95  private final PrivateKey privateKey;
96  private final String wechatPayPublicKeyId;
97  private final PublicKey wechatPayPublicKey;
98
99  public NotifyRefund(String mchid, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
100    this.mchid = mchid;
101    this.certificateSerialNo = certificateSerialNo;
102    this.privateKey = WXPayUtility.loadPrivateKeyFromPath(privateKeyFilePath);
103    this.wechatPayPublicKeyId = wechatPayPublicKeyId;
104    this.wechatPayPublicKey = WXPayUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
105  }
106
107  public static class NotifyRefundRequest {
108    @SerializedName("mix_trade_no")
109    @Expose(serialize = false)
110    public String mixTradeNo;
111  
112    @SerializedName("med_refund_total_fee")
113    public Long medRefundTotalFee;
114  
115    @SerializedName("med_refund_gov_fee")
116    public Long medRefundGovFee;
117  
118    @SerializedName("med_refund_self_fee")
119    public Long medRefundSelfFee;
120  
121    @SerializedName("med_refund_other_fee")
122    public Long medRefundOtherFee;
123  
124    @SerializedName("refund_time")
125    public String refundTime;
126  
127    @SerializedName("out_refund_no")
128    public String outRefundNo;
129  }
130  
131}
132

1package main
2
3import (
4	"bytes"
5	"demo/wxpay_utility" // 引用微信支付工具库，参考 https://pay.weixin.qq.com/doc/v3/merchant/4015119334
6	"encoding/json"
7	"fmt"
8	"net/http"
9	"net/url"
10)
11
12func main() {
13	// TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/v3/merchant/4013070756
14	config, err := wxpay_utility.CreateMchConfig(
15		"19xxxxxxxx",                 // 商户号，是由微信支付系统生成并分配给每个商户的唯一标识符，商户号获取方式参考 https://pay.weixin.qq.com/doc/v3/merchant/4013070756
16		"1DDE55AD98Exxxxxxxxxx",      // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/merchant/4013053053
17		"/path/to/apiclient_key.pem", // 商户API证书私钥文件路径，本地文件路径
18		"PUB_KEY_ID_xxxxxxxxxxxxx",   // 微信支付公钥ID，如何获取请参考 https://pay.weixin.qq.com/doc/v3/merchant/4013038816
19		"/path/to/wxp_pub.pem",       // 微信支付公钥文件路径，本地文件路径
20	)
21	if err != nil {
22		fmt.Println(err)
23		return
24	}
25
26	request := &NotifyRefundRequest{
27		MixTradeNo:        wxpay_utility.String("202204022005169952975171534816"),
28		MedRefundTotalFee: wxpay_utility.Int64(45000),
29		MedRefundGovFee:   wxpay_utility.Int64(45000),
30		MedRefundSelfFee:  wxpay_utility.Int64(45000),
31		MedRefundOtherFee: wxpay_utility.Int64(45000),
32		RefundTime:        wxpay_utility.String("2015-05-20T13:29:35+08:00"),
33		OutRefundNo:       wxpay_utility.String("R202204022005169952975171534816"),
34	}
35
36	err = NotifyRefund(config, request)
37	if err != nil {
38		fmt.Printf("请求失败: %+v\n", err)
39		// TODO: 请求失败，根据状态码执行不同的处理
40		return
41	}
42
43	// TODO: 请求成功，继续业务逻辑
44	fmt.Println("请求成功")
45}
46
47func NotifyRefund(config *wxpay_utility.MchConfig, request *NotifyRefundRequest) (err error) {
48	const (
49		host   = "https://api.mch.weixin.qq.com"
50		method = "POST"
51		path   = "/v3/med-ins/refunds/notify"
52	)
53
54	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
55	if err != nil {
56		return err
57	}
58	query := reqUrl.Query()
59	if request.MixTradeNo != nil {
60		query.Add("mix_trade_no", *request.MixTradeNo)
61	}
62	reqUrl.RawQuery = query.Encode()
63	reqBody, err := json.Marshal(request)
64	if err != nil {
65		return err
66	}
67	httpRequest, err := http.NewRequest(method, reqUrl.String(), bytes.NewReader(reqBody))
68	if err != nil {
69		return err
70	}
71	httpRequest.Header.Set("Accept", "application/json")
72	httpRequest.Header.Set("Wechatpay-Serial", config.WechatPayPublicKeyId())
73	httpRequest.Header.Set("Content-Type", "application/json")
74	authorization, err := wxpay_utility.BuildAuthorization(config.MchId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), reqBody)
75	if err != nil {
76		return err
77	}
78	httpRequest.Header.Set("Authorization", authorization)
79
80	client := &http.Client{}
81	httpResponse, err := client.Do(httpRequest)
82	if err != nil {
83		return err
84	}
85	respBody, err := wxpay_utility.ExtractResponseBody(httpResponse)
86	if err != nil {
87		return err
88	}
89	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
90		// 2XX 成功，验证应答签名
91		err = wxpay_utility.ValidateResponse(
92			config.WechatPayPublicKeyId(),
93			config.WechatPayPublicKey(),
94			&httpResponse.Header,
95			respBody,
96		)
97		if err != nil {
98			return err
99		}
100		return nil
101	} else {
102		return wxpay_utility.NewApiException(
103			httpResponse.StatusCode,
104			httpResponse.Header,
105			respBody,
106		)
107	}
108}
109
110type NotifyRefundRequest struct {
111	MixTradeNo        *string `json:"mix_trade_no,omitempty"`
112	MedRefundTotalFee *int64  `json:"med_refund_total_fee,omitempty"`
113	MedRefundGovFee   *int64  `json:"med_refund_gov_fee,omitempty"`
114	MedRefundSelfFee  *int64  `json:"med_refund_self_fee,omitempty"`
115	MedRefundOtherFee *int64  `json:"med_refund_other_fee,omitempty"`
116	RefundTime        *string `json:"refund_time,omitempty"`
117	OutRefundNo       *string `json:"out_refund_no,omitempty"`
118}
119
120func (o *NotifyRefundRequest) MarshalJSON() ([]byte, error) {
121	type Alias NotifyRefundRequest
122	a := &struct {
123		MixTradeNo *string `json:"mix_trade_no,omitempty"`
124		*Alias
125	}{
126		// 序列化时移除非 Body 字段
127		MixTradeNo: nil,
128		Alias:      (*Alias)(o),
129	}
130	return json.Marshal(a)
131}
132