向用户预发放商品券

1curl -X POST \
2  https://api.mch.weixin.qq.com/v3/marketing/partner/product-coupon/users/oh-394z-6CGkNoJrsDLTTUKiAnp4/pre-send-coupon \
3  -H "Authorization: WECHATPAY2-SHA256-RSA2048 mchid=\"1900000001\",..." \
4  -H "Accept: application/json" \
5  -H "Content-Type: application/json" \
6  -d '{
7    "product_coupon_id" : "200000001",
8    "stock_id" : "100232301",
9    "coupon_code" : "123446565767",
10    "appid" : "wx233544546545989",
11    "send_request_no" : "34657_20250101_123456",
12    "attach" : "example_attach",
13    "brand_id" : "120344"
14  }'
15

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/partner/4014985777
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 * 向用户预发放商品券
24 */
25public class PreSendUserProductCoupon {
26  private static String HOST = "https://api.mch.weixin.qq.com";
27  private static String METHOD = "POST";
28  private static String PATH = "/v3/marketing/partner/product-coupon/users/{openid}/pre-send-coupon";
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/partner/4013080340
32    PreSendUserProductCoupon client = new PreSendUserProductCoupon(
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/partner/4013080340
34      "1DDE55AD98Exxxxxxxxxx",         // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/partner/4013058924
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/partner/4013038589
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    PreSendUserProductCouponRequest request = new PreSendUserProductCouponRequest();
41    request.openid = "oh-394z-6CGkNoJrsDLTTUKiAnp4";
42    request.productCouponId = "200000001";
43    request.stockId = "100232301";
44    request.couponCode = "123446565767";
45    request.appid = "wx233544546545989";
46    request.sendRequestNo = "34657_20250101_123456";
47    request.attach = "example_attach";
48    request.brandId = "120344";
49    try {
50      PreSendUserProductCouponResponse response = client.run(request);
51        // TODO: 请求成功，继续业务逻辑
52        System.out.println(response);
53    } catch (WXPayUtility.ApiException e) {
54        // TODO: 请求失败，根据状态码执行不同的逻辑
55        e.printStackTrace();
56    }
57  }
58
59  public PreSendUserProductCouponResponse run(PreSendUserProductCouponRequest request) {
60    String uri = PATH;
61    uri = uri.replace("{openid}", WXPayUtility.urlEncode(request.openid));
62    String reqBody = WXPayUtility.toJson(request);
63
64    Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
65    reqBuilder.addHeader("Accept", "application/json");
66    reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
67    reqBuilder.addHeader("Authorization", WXPayUtility.buildAuthorization(mchid, certificateSerialNo,privateKey, METHOD, uri, reqBody));
68    reqBuilder.addHeader("Content-Type", "application/json");
69    RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqBody);
70    reqBuilder.method(METHOD, requestBody);
71    Request httpRequest = reqBuilder.build();
72
73    // 发送HTTP请求
74    OkHttpClient client = new OkHttpClient.Builder().build();
75    try (Response httpResponse = client.newCall(httpRequest).execute()) {
76      String respBody = WXPayUtility.extractBody(httpResponse);
77      if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
78        // 2XX 成功，验证应答签名
79        WXPayUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey,
80            httpResponse.headers(), respBody);
81
82        // 从HTTP应答报文构建返回数据
83        return WXPayUtility.fromJson(respBody, PreSendUserProductCouponResponse.class);
84      } else {
85        throw new WXPayUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
86      }
87    } catch (IOException e) {
88      throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
89    }
90  }
91
92  private final String mchid;
93  private final String certificateSerialNo;
94  private final PrivateKey privateKey;
95  private final String wechatPayPublicKeyId;
96  private final PublicKey wechatPayPublicKey;
97
98  public PreSendUserProductCoupon(String mchid, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
99    this.mchid = mchid;
100    this.certificateSerialNo = certificateSerialNo;
101    this.privateKey = WXPayUtility.loadPrivateKeyFromPath(privateKeyFilePath);
102    this.wechatPayPublicKeyId = wechatPayPublicKeyId;
103    this.wechatPayPublicKey = WXPayUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
104  }
105
106  public static class PreSendUserProductCouponRequest {
107    @SerializedName("product_coupon_id")
108    public String productCouponId;
109  
110    @SerializedName("stock_id")
111    public String stockId;
112  
113    @SerializedName("coupon_code")
114    public String couponCode;
115  
116    @SerializedName("appid")
117    public String appid;
118  
119    @SerializedName("openid")
120    @Expose(serialize = false)
121    public String openid;
122  
123    @SerializedName("send_request_no")
124    public String sendRequestNo;
125  
126    @SerializedName("attach")
127    public String attach;
128  
129    @SerializedName("brand_id")
130    public String brandId;
131  }
132  
133  public static class PreSendUserProductCouponResponse {
134    @SerializedName("token")
135    public String token;
136  }
137  
138}
139

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/partner/4015119446
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/partner/4013080340
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/partner/4013080340
17		"1DDE55AD98Exxxxxxxxxx",      // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/partner/4013058924
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/partner/4013038589
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 := &PreSendUserProductCouponRequest{
28		Openid:          wxpay_utility.String("oh-394z-6CGkNoJrsDLTTUKiAnp4"),
29		ProductCouponId: wxpay_utility.String("200000001"),
30		StockId:         wxpay_utility.String("100232301"),
31		CouponCode:      wxpay_utility.String("123446565767"),
32		Appid:           wxpay_utility.String("wx233544546545989"),
33		SendRequestNo:   wxpay_utility.String("34657_20250101_123456"),
34		Attach:          wxpay_utility.String("example_attach"),
35		BrandId:         wxpay_utility.String("120344"),
36	}
37
38	response, err := PreSendUserProductCoupon(config, request)
39	if err != nil {
40		fmt.Printf("请求失败: %+v\n", err)
41		// TODO: 请求失败，根据状态码执行不同的处理
42		return
43	}
44
45	// TODO: 请求成功，继续业务逻辑
46	fmt.Printf("请求成功: %+v\n", response)
47}
48
49func PreSendUserProductCoupon(config *wxpay_utility.MchConfig, request *PreSendUserProductCouponRequest) (response *PreSendUserProductCouponResponse, err error) {
50	const (
51		host   = "https://api.mch.weixin.qq.com"
52		method = "POST"
53		path   = "/v3/marketing/partner/product-coupon/users/{openid}/pre-send-coupon"
54	)
55
56	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
57	if err != nil {
58		return nil, err
59	}
60	reqUrl.Path = strings.Replace(reqUrl.Path, "{openid}", url.PathEscape(*request.Openid), -1)
61	reqBody, err := json.Marshal(request)
62	if err != nil {
63		return nil, err
64	}
65	httpRequest, err := http.NewRequest(method, reqUrl.String(), bytes.NewReader(reqBody))
66	if err != nil {
67		return nil, err
68	}
69	httpRequest.Header.Set("Accept", "application/json")
70	httpRequest.Header.Set("Wechatpay-Serial", config.WechatPayPublicKeyId())
71	httpRequest.Header.Set("Content-Type", "application/json")
72	authorization, err := wxpay_utility.BuildAuthorization(config.MchId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), reqBody)
73	if err != nil {
74		return nil, err
75	}
76	httpRequest.Header.Set("Authorization", authorization)
77
78	client := &http.Client{}
79	httpResponse, err := client.Do(httpRequest)
80	if err != nil {
81		return nil, err
82	}
83	respBody, err := wxpay_utility.ExtractResponseBody(httpResponse)
84	if err != nil {
85		return nil, err
86	}
87	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
88		// 2XX 成功，验证应答签名
89		err = wxpay_utility.ValidateResponse(
90			config.WechatPayPublicKeyId(),
91			config.WechatPayPublicKey(),
92			&httpResponse.Header,
93			respBody,
94		)
95		if err != nil {
96			return nil, err
97		}
98		response := &PreSendUserProductCouponResponse{}
99		if err := json.Unmarshal(respBody, response); err != nil {
100			return nil, err
101		}
102
103		return response, nil
104	} else {
105		return nil, wxpay_utility.NewApiException(
106			httpResponse.StatusCode,
107			httpResponse.Header,
108			respBody,
109		)
110	}
111}
112
113type PreSendUserProductCouponRequest struct {
114	ProductCouponId *string `json:"product_coupon_id,omitempty"`
115	StockId         *string `json:"stock_id,omitempty"`
116	CouponCode      *string `json:"coupon_code,omitempty"`
117	Appid           *string `json:"appid,omitempty"`
118	Openid          *string `json:"openid,omitempty"`
119	SendRequestNo   *string `json:"send_request_no,omitempty"`
120	Attach          *string `json:"attach,omitempty"`
121	BrandId         *string `json:"brand_id,omitempty"`
122}
123
124func (o *PreSendUserProductCouponRequest) MarshalJSON() ([]byte, error) {
125	type Alias PreSendUserProductCouponRequest
126	a := &struct {
127		Openid *string `json:"openid,omitempty"`
128		*Alias
129	}{
130		// 序列化时移除非 Body 字段
131		Openid: nil,
132		Alias:  (*Alias)(o),
133	}
134	return json.Marshal(a)
135}
136
137type PreSendUserProductCouponResponse struct {
138	Token *string `json:"token,omitempty"`
139}
140