撤销

1curl -X POST \
2  https://api.mch.weixin.qq.com/v3/pay/transactions/out-trade-no/1217752501201407033233368018/reverse \
3  -H "Authorization: WECHATPAY2-SHA256-RSA2048 mchid=\"1900000001\",..." \
4  -H "Accept: application/json" \
5  -H "Content-Type: application/json" \
6  -d '{
7    "appid" : "wxd678efh567hg6787",
8    "mchid" : "1230000109"
9  }'
10

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 * 撤销
24 */
25public class Reverse {
26  private static String HOST = "https://api.mch.weixin.qq.com";
27  private static String METHOD = "POST";
28  private static String PATH = "/v3/pay/transactions/out-trade-no/{out_trade_no}/reverse";
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    Reverse client = new Reverse(
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    ReverseRequest request = new ReverseRequest();
41    request.outTradeNo = "1217752501201407033233368018";
42    request.appid = "wxd678efh567hg6787";
43    request.mchid = "1230000109";
44    try {
45      DirectReverseResponse response = client.run(request);
46        // TODO: 请求成功，继续业务逻辑
47        System.out.println(response);
48    } catch (WXPayUtility.ApiException e) {
49        // TODO: 请求失败，根据状态码执行不同的逻辑
50        e.printStackTrace();
51    }
52  }
53
54  public DirectReverseResponse run(ReverseRequest request) {
55    String uri = PATH;
56    uri = uri.replace("{out_trade_no}", WXPayUtility.urlEncode(request.outTradeNo));
57    String reqBody = WXPayUtility.toJson(request);
58
59    Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
60    reqBuilder.addHeader("Accept", "application/json");
61    reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
62    reqBuilder.addHeader("Authorization", WXPayUtility.buildAuthorization(mchid, certificateSerialNo,privateKey, METHOD, uri, reqBody));
63    reqBuilder.addHeader("Content-Type", "application/json");
64    RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqBody);
65    reqBuilder.method(METHOD, requestBody);
66    Request httpRequest = reqBuilder.build();
67
68    // 发送HTTP请求
69    OkHttpClient client = new OkHttpClient.Builder().build();
70    try (Response httpResponse = client.newCall(httpRequest).execute()) {
71      String respBody = WXPayUtility.extractBody(httpResponse);
72      if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
73        // 2XX 成功，验证应答签名
74        WXPayUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey,
75            httpResponse.headers(), respBody);
76
77        // 从HTTP应答报文构建返回数据
78        return WXPayUtility.fromJson(respBody, DirectReverseResponse.class);
79      } else {
80        throw new WXPayUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
81      }
82    } catch (IOException e) {
83      throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
84    }
85  }
86
87  private final String mchid;
88  private final String certificateSerialNo;
89  private final PrivateKey privateKey;
90  private final String wechatPayPublicKeyId;
91  private final PublicKey wechatPayPublicKey;
92
93  public Reverse(String mchid, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
94    this.mchid = mchid;
95    this.certificateSerialNo = certificateSerialNo;
96    this.privateKey = WXPayUtility.loadPrivateKeyFromPath(privateKeyFilePath);
97    this.wechatPayPublicKeyId = wechatPayPublicKeyId;
98    this.wechatPayPublicKey = WXPayUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
99  }
100
101  public static class ReverseRequest {
102    @SerializedName("appid")
103    public String appid;
104  
105    @SerializedName("mchid")
106    public String mchid;
107  
108    @SerializedName("out_trade_no")
109    @Expose(serialize = false)
110    public String outTradeNo;
111  }
112  
113  public static class DirectReverseResponse {
114    @SerializedName("appid")
115    public String appid;
116  
117    @SerializedName("mchid")
118    public String mchid;
119  
120    @SerializedName("out_trade_no")
121    public String outTradeNo;
122  }
123  
124}
125

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	"strings"
11)
12
13func main() {
14	// TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/v3/merchant/4013070756
15	config, err := wxpay_utility.CreateMchConfig(
16		"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
17		"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
18		"/path/to/apiclient_key.pem", // 商户API证书私钥文件路径，本地文件路径
19		"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
20		"/path/to/wxp_pub.pem",       // 微信支付公钥文件路径，本地文件路径
21	)
22	if err != nil {
23		fmt.Println(err)
24		return
25	}
26
27	request := &ReverseRequest{
28		OutTradeNo: wxpay_utility.String("1217752501201407033233368018"),
29		Appid:      wxpay_utility.String("wxd678efh567hg6787"),
30		Mchid:      wxpay_utility.String("1230000109"),
31	}
32
33	response, err := Reverse(config, request)
34	if err != nil {
35		fmt.Printf("请求失败: %+v\n", err)
36		// TODO: 请求失败，根据状态码执行不同的处理
37		return
38	}
39
40	// TODO: 请求成功，继续业务逻辑
41	fmt.Printf("请求成功: %+v\n", response)
42}
43
44func Reverse(config *wxpay_utility.MchConfig, request *ReverseRequest) (response *DirectReverseResponse, err error) {
45	const (
46		host   = "https://api.mch.weixin.qq.com"
47		method = "POST"
48		path   = "/v3/pay/transactions/out-trade-no/{out_trade_no}/reverse"
49	)
50
51	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
52	if err != nil {
53		return nil, err
54	}
55	reqUrl.Path = strings.Replace(reqUrl.Path, "{out_trade_no}", url.PathEscape(*request.OutTradeNo), -1)
56	reqBody, err := json.Marshal(request)
57	if err != nil {
58		return nil, err
59	}
60	httpRequest, err := http.NewRequest(method, reqUrl.String(), bytes.NewReader(reqBody))
61	if err != nil {
62		return nil, err
63	}
64	httpRequest.Header.Set("Accept", "application/json")
65	httpRequest.Header.Set("Wechatpay-Serial", config.WechatPayPublicKeyId())
66	httpRequest.Header.Set("Content-Type", "application/json")
67	authorization, err := wxpay_utility.BuildAuthorization(config.MchId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), reqBody)
68	if err != nil {
69		return nil, err
70	}
71	httpRequest.Header.Set("Authorization", authorization)
72
73	client := &http.Client{}
74	httpResponse, err := client.Do(httpRequest)
75	if err != nil {
76		return nil, err
77	}
78	respBody, err := wxpay_utility.ExtractResponseBody(httpResponse)
79	if err != nil {
80		return nil, err
81	}
82	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
83		// 2XX 成功，验证应答签名
84		err = wxpay_utility.ValidateResponse(
85			config.WechatPayPublicKeyId(),
86			config.WechatPayPublicKey(),
87			&httpResponse.Header,
88			respBody,
89		)
90		if err != nil {
91			return nil, err
92		}
93		response := &DirectReverseResponse{}
94		if err := json.Unmarshal(respBody, response); err != nil {
95			return nil, err
96		}
97
98		return response, nil
99	} else {
100		return nil, wxpay_utility.NewApiException(
101			httpResponse.StatusCode,
102			httpResponse.Header,
103			respBody,
104		)
105	}
106}
107
108type ReverseRequest struct {
109	Appid      *string `json:"appid,omitempty"`
110	Mchid      *string `json:"mchid,omitempty"`
111	OutTradeNo *string `json:"out_trade_no,omitempty"`
112}
113
114func (o *ReverseRequest) MarshalJSON() ([]byte, error) {
115	type Alias ReverseRequest
116	a := &struct {
117		OutTradeNo *string `json:"out_trade_no,omitempty"`
118		*Alias
119	}{
120		// 序列化时移除非 Body 字段
121		OutTradeNo: nil,
122		Alias:      (*Alias)(o),
123	}
124	return json.Marshal(a)
125}
126
127type DirectReverseResponse struct {
128	Appid      *string `json:"appid,omitempty"`
129	Mchid      *string `json:"mchid,omitempty"`
130	OutTradeNo *string `json:"out_trade_no,omitempty"`
131}
132