第三方通过微信APP支付流程

Dear 丶 2022-12-17 07:08 228阅读 0赞

本章文献基本都来源于微信支付平台，详情请看微信官方文档：[APP支付][APP]

## 系统交互图 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQ3OTkyOTI_size_16_color_FFFFFF_t_70][]

文档位置：[https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8\_3][https_pay.weixin.qq.com_wiki_doc_api_app_app.php_chapter_8_3] APP支付-业务流程

根据文档内容，服务端只要做好获取 prepay\_id 和 sign 传送给客户端，并做好回调接收处理就行

## 服务端demo ##

APP支付文档里面的demo，主要是供客户端使用的，对后台来说，基本没什么用。

不过，依旧有我们后端可以直接拿来使用的demo： [https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=11\_1][https_pay.weixin.qq.com_wiki_doc_api_jsapi.php_chapter_11_1]

这个demo主要用于付款码/扫码/H5支付使用，但里面提供了很多方便的工具类。

这里我们引用demo里面的工具类并继承WXPayConfig和实现IWXPayDomain的抽象接口。

1.  `public class WxPayConfigImpl extends WXPayConfig{`
2.  
3.  `// 设置应用Id`
4.  `public static String appid = "2019102168481752";`
5.  `// 设置商户号`
6.  `public static String mch_id = "1230000109";`
7.  `// 设置设备号（终端设备号(门店号或收银设备ID)，默认请传"WEB"，非必需）`
8.  `public static String device_info = "WEB";`
9.  `// 设置字符集`
10. `public static String key = "192006250b4c09247ec02edce69f6a2d";`
11. 
12. `private static WxPayConfigImpl INSTANCE;`
13. 
14. `public static WxPayConfigImpl getInstance() throws Exception {`
15. `if (INSTANCE == null) {`
16. `synchronized (WxPayConfigImpl.class) {`
17. `if (INSTANCE == null) {`
18. `INSTANCE = new WxPayConfigImpl();`
19. `}`
20. `}`
21. `}`
22. `return INSTANCE;`
23. `}`
24. 
25. `@Override`
26. `public String getAppID() {`
27. `return appid;`
28. `}`
29. `@Override`
30. `public String getMchID() {`
31. `return mch_id;`
32. `}`
33. `@Override`
34. `public String getKey() {`
35. `return key;`
36. `}`
37. `@Override`
38. `public InputStream getCertStream() {`
39. `//这个可以看我另一篇“支付宝：APP支付接口2.0(alipay.trade.app.pay)”`
40. `//里的“使用demo”步骤，有讲解，如果是个springboot构成的jar，如何设置证书路径`
41. `//文章链接：https://blog.csdn.net/u014799292/article/details/102680149`
42. `String fileUrl = "证书路径";`
43. `InputStream certStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileUrl);`
44. `byte[] certData = null;`
45. `try {`
46. `certData = IOUtils.toByteArray(certStream);`
47. `} catch (IOException e) {`
48. `// TODO Auto-generated catch block`
49. `e.printStackTrace();`
50. `}finally{`
51. `if(certStream != null){`
52. `try {`
53. `certStream.close();`
54. `} catch (IOException e) {`
55. `// TODO Auto-generated catch block`
56. `e.printStackTrace();`
57. `}`
58. `}`
59. `}`
60. `return new ByteArrayInputStream(certData);`
61. `}`
62. `@Override`
63. `public IWXPayDomain getWXPayDomain() {`
64. `return WxPayDomainImpl.instance();`
65. `}`
66. `}`

1.  `public class WxPayDomainImpl implements IWXPayDomain {`
2.  
3.  `private final int MIN_SWITCH_PRIMARY_MSEC = 3 * 60 * 1000; //3 minutes`
4.  `private long switchToAlternateDomainTime = 0;`
5.  `private Map<String, DomainStatics> domainData = new HashMap<String, DomainStatics>();`
6.  
7.  `private WxPayDomainImpl(){`
8.  
9.  `}`
10. `private static class WxpayDomainHolder{`
11. `private static IWXPayDomain holder = new WxPayDomainImpl();`
12. `}`
13. 
14. `public static IWXPayDomain instance(){`
15. `return WxpayDomainHolder.holder;`
16. `}`
17. 
18. `@Override`
19. `public void report(String domain, long elapsedTimeMillis, Exception ex) {`
20. 
21. `DomainStatics info = domainData.get(domain);`
22. `if(info == null){`
23. `info = new DomainStatics(domain);`
24. `domainData.put(domain, info);`
25. `}`
26. 
27. `if(ex == null){ //success`
28. `if(info.succCount >= 2){ //continue succ, clear error count`
29. `info.connectTimeoutCount = info.dnsErrorCount = info.otherErrorCount = 0;`
30. `}else{`
31. `++info.succCount;`
32. `}`
33. `}else if(ex instanceof ConnectTimeoutException){`
34. `info.succCount = info.dnsErrorCount = 0;`
35. `++info.connectTimeoutCount;`
36. `}else if(ex instanceof UnknownHostException){`
37. `info.succCount = 0;`
38. `++info.dnsErrorCount;`
39. `}else{`
40. `info.succCount = 0;`
41. `++info.otherErrorCount;`
42. `}`
43. `}`
44. 
45. `@Override`
46. `public DomainInfo getDomain(WXPayConfig config) {`
47. 
48. `DomainStatics primaryDomain = domainData.get(WXPayConstants.DOMAIN_API);`
49. `if(primaryDomain == null ||`
50. `primaryDomain.isGood()) {`
51. `return new DomainInfo(WXPayConstants.DOMAIN_API, true);`
52. `}`
53. 
54. `long now = System.currentTimeMillis();`
55. `if(switchToAlternateDomainTime == 0){ //first switch`
56. `switchToAlternateDomainTime = now;`
57. `return new DomainInfo(WXPayConstants.DOMAIN_API2, false);`
58. `}else if(now - switchToAlternateDomainTime < MIN_SWITCH_PRIMARY_MSEC){`
59. `DomainStatics alternateDomain = domainData.get(WXPayConstants.DOMAIN_API2);`
60. `if(alternateDomain == null ||`
61. `alternateDomain.isGood() ||`
62. `alternateDomain.badCount() < primaryDomain.badCount()){`
63. `return new DomainInfo(WXPayConstants.DOMAIN_API2, false);`
64. `}else{`
65. `return new DomainInfo(WXPayConstants.DOMAIN_API, true);`
66. `}`
67. `}else{ //force switch back`
68. `switchToAlternateDomainTime = 0;`
69. `primaryDomain.resetCount();`
70. `DomainStatics alternateDomain = domainData.get(WXPayConstants.DOMAIN_API2);`
71. `if(alternateDomain != null)`
72. `alternateDomain.resetCount();`
73. `return new DomainInfo(WXPayConstants.DOMAIN_API, true);`
74. `}`
75. `}`
76. 
77. `static class DomainStatics {`
78. `final String domain;`
79. `int succCount = 0;`
80. `int connectTimeoutCount = 0;`
81. `int dnsErrorCount =0;`
82. `int otherErrorCount = 0;`
83. 
84. `DomainStatics(String domain) {`
85. `this.domain = domain;`
86. `}`
87. `void resetCount(){`
88. `succCount = connectTimeoutCount = dnsErrorCount = otherErrorCount = 0;`
89. `}`
90. `boolean isGood(){ return connectTimeoutCount <= 2 && dnsErrorCount <= 2; }`
91. `int badCount(){`
92. `return connectTimeoutCount + dnsErrorCount * 5 + otherErrorCount / 4;`
93. `}`
94. `}`
95. 
96. `}`

给 WXPayUtil 再添加几个时间工具方法（看自己需求定制），项目会在最后附链接。

### appid & 商户号位置 ###

登录商户平台-产品中心-[账号关联（AppID绑定）][AppID]，进入授权申请页面；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQ3OTkyOTI_size_16_color_FFFFFF_t_70 1][]

### 密钥key位置 ###

登录商户平台-->>账户中心-->>API安全-->>设置API密钥（32位，下面给出生成方式，然后复制粘贴到秘钥位置，记得保留，之后无法查看，只能再次生成，测试环境随便改，正式服记得最好固定一次，修改可能会引起服务端数据错误）

1.  
2.  `private static final String SYMBOLS = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";`
3.  
4.  `private static final Random RANDOM = new SecureRandom();`
5.  
6.  `/**`
7.  `* 获取随机字符串 Nonce Str`
8.  `*`
9.  `* @return String 随机字符串`
10. `*/`
11. `public static String generateNonceStr() {`
12. `char[] nonceChars = new char[32];`
13. `for (int index = 0; index < nonceChars.length; ++index) {`
14. `nonceChars[index] = SYMBOLS.charAt(RANDOM.nextInt(SYMBOLS.length()));`
15. `}`
16. `return new String(nonceChars);`
17. `}`

再来写一个请求类，处理微信订单（订单--统一下单/调起支付接口/支付结果通知/查询订单/关闭订单）

1.  `/**`
2.  `* 订单--统一下单/调起支付接口/退款/结果通知/查询订单/关闭订单`
3.  `* 借鉴：https://blog.csdn.net/asd54090/article/details/81028323`
4.  `*/`
5.  `public class WxAppPayRequest {`
6.  
7.  `private static final Logger logger = LoggerFactory.getLogger(WxAppPayRequest.class);`
8.  
9.  `private WxPayConfigImpl config;`
10. `private WXPay wxpay;`
11. 
12. `/**`
13. `* 微信支付请求`
14. `*/`
15. `public WxAppPayRequest() {`
16. `try {`
17. `config = WxPayConfigImpl.getInstance();`
18. `wxpay = new WXPay(config);`
19. `} catch (Exception e) {`
20. `e.printStackTrace();`
21. `logger.error("微信配置初始化错误", e);`
22. `}`
23. `}`
24. 
25. `/**`
26. `* APP支付订单请求`
27. `*`
28. `* @param body`
29. `* 格式：APP名字-实际商品名称，如：天天爱消除-游戏充值`
30. `* @param attach`
31. `* 附加数据，在查询API和支付通知中原样返回`
32. `* @param outTradeNo`
33. `* 商户订单号`
34. `* @param totalFee`
35. `* 总金额`
36. `* @param startTime`
37. `* 订单开始时间String格式： yyyy-MM-dd HH:mm:ss`
38. `* @param expireMinute`
39. `* 有效时间（分钟）`
40. `* @param notifyUrl`
41. `* 微信支付异步通知回调地址`
42. `* @return`
43. `*/`
44. `private WxAppPayResponseCode getOrderSign(String body, String attach, String outTradeNo, BigDecimal totalFee,`
45. `String startTime, int expireMinute, String notifyUrl) {`
46. 
47. `// 准备好请求参数`
48. `Map<String, String> map = new HashMap<String, String>();`
49. `map.put("device_info", WxPayConfigImpl.device_info);`
50. `map.put("body", body);`
51. `if (attach != null && !attach.isEmpty()) {`
52. `map.put("attach", attach);`
53. `}`
54. `map.put("out_trade_no", outTradeNo);`
55. `map.put("total_fee", totalFee.toString());`
56. `map.put("spbill_create_ip", WXPayUtil.getLocalAddress());`
57. `map.put("time_start", WXPayUtil.getFormatTime(startTime));`
58. `String endTime = WXPayUtil.getNSecondTime(startTime, expireMinute);`
59. `map.put("time_expire", WXPayUtil.getFormatTime(endTime));`
60. `map.put("notify_url", notifyUrl);`
61. `map.put("trade_type", "APP");`
62. 
63. `// 生成带sign的xml字符串`
64. `Map<String, String> unifiedOrderMap = null;`
65. `try {`
66. `unifiedOrderMap = wxpay.unifiedOrder(map);`
67. `if (unifiedOrderMap == null || (unifiedOrderMap != null`
68. `&& WxAppPayResponseCode.FAIL.code().equals(unifiedOrderMap.get("return_code")))) {`
69. `String errorMsg = "调用微信“统一下单”获取prepayid 失败...";`
70. `logger.info("getOrderSign --unifiedOrder: 调用微信“统一下单”获取prepayid 失败.");`
71. `logger.info("getOrderSign --unifiedOrder: 请求参数：" + map.toString());`
72. `logger.info("getOrderSign --unifiedOrder: 返回Map：" + unifiedOrderMap);`
73. `if (unifiedOrderMap != null) {`
74. `errorMsg += " 异常信息为：" + unifiedOrderMap.get("return_msg");`
75. `}`
76. `WxAppPayResponseCode error = WxAppPayResponseCode.ERROR;`
77. `error.setAlias(errorMsg);`
78. `return error;`
79. `}`
80. `} catch (Exception e) {`
81. `// TODO Auto-generated catch block`
82. `e.printStackTrace();`
83. `logger.error("getOrderSign : 调用微信“统一下单”失败 。", e);`
84. `WxAppPayResponseCode error = WxAppPayResponseCode.ERROR;`
85. `error.setAlias("调用微信“统一下单”失败 。" + e.toString());`
86. `return error;`
87. `}`
88. 
89. `// 调用微信请求成功，但响应失败`
90. `String resultCode = unifiedOrderMap.get("result_code");`
91. `if (WxAppPayResponseCode.FAIL.code().equals(resultCode)) {`
92. `WxAppPayResponseCode error = WxAppPayResponseCode.findCode(unifiedOrderMap.get("err_code"));`
93. `return error;`
94. `}`
95. 
96. `return parseWXOrderResponse(unifiedOrderMap);`
97. `}`
98. 
99. `/**`
100. `* 将map转成客户端订单用的封装体`
101. `*`
102. `* @param map`
103. `* map`
104. `* @return 用户端用的封装体`
105. `*/`
106. `private WxAppPayResponseCode parseWXOrderResponse(Map<String, String> map) {`
107. 
108. `WxOrderResponse response = new WxOrderResponse();`
109. `response.setAppid(map.get("appid"));`
110. `response.setPartnerid(map.get("partnerid"));`
111. `response.setPrepayid(map.get("prepay_id"));`
112. `response.setPack("Sign=WXPay");`
113. `response.setNoncestr(map.get("noncestr"));`
114. `String timestamp = WXPayUtil.getCurrentTimestamp() + "";`
115. `response.setTimestamp(timestamp);`
116. 
117. `// 前人踩坑，咱们乘凉`
118. `// sgin（签名），不是拿微信“统一下单”返回的sgin，而是自己再签一次，返回给客户端`
119. `// 签名的参数拿的不是“统一下单”，而是拿“调起支付接口”里面的参数，这步API文档写的是客户端生成，不过咱们服务端就帮他做了`
120. `// 注意：map的key不能是大写`
121. `Map<String, String> params = new HashMap<>();`
122. `params.put("appid", map.get("appid"));`
123. `params.put("partnerid", map.get("partnerid"));`
124. `params.put("prepayid", map.get("prepay_id"));`
125. `params.put("package", "Sign=WXPay");`
126. `params.put("noncestr", map.get("nonce_str"));`
127. `params.put("timestamp", timestamp);`
128. `try {`
129. `// 这个sign是移动端要请求微信服务端的，也是我们要保存后面校验的`
130. `String sgin = WXPayUtil.generateSignature(params, config.getKey());`
131. `response.setSign(sgin);`
132. `} catch (Exception e) {`
133. `e.printStackTrace();`
134. `logger.error("parseWXOrderResponse : 订单第二次供客户端签名信息失败 。");`
135. `logger.error("parseWXOrderResponse : 请求参数：" + params.toString());`
136. `logger.error("parseWXOrderResponse : 返回错误信息：", e);`
137. `WxAppPayResponseCode errorData = WxAppPayResponseCode.ERROR;`
138. `errorData.setAlias("调用支付接口生成签名sign失败！");`
139. `return errorData;`
140. `}`
141. `WxAppPayResponseCode successData = WxAppPayResponseCode.SUCCESS;`
142. `successData.setAlias(JSONObject.toJSONString(response));`
143. `return successData;`
144. `}`
145. 
146. `/**`
147. `* 查微信订单`
148. `*`
149. `* @param outTradeNo`
150. `* 订单号`
151. `*/`
152. `public WxAppPayResponseCode queryOrderByOutTradeNo(String outTradeNo) {`
153. 
154. `logger.info("查询微信支付订单信息，订单号为：" + outTradeNo);`
155. `HashMap<String, String> data = new HashMap<String, String>();`
156. `data.put("out_trade_no", outTradeNo);`
157. `try {`
158. `Map<String, String> orderQueryMap = wxpay.orderQuery(data);`
159. `return disposeReturnInfo(orderQueryMap);`
160. `} catch (Exception e) {`
161. `e.printStackTrace();`
162. `logger.error("queryOrderByOutTradeNo : 查询微信订单支付信息失败 。订单号：" + outTradeNo);`
163. `logger.error("queryOrderByOutTradeNo : 返回错误信息：", e);`
164. `WxAppPayResponseCode errorData = WxAppPayResponseCode.ERROR;`
165. `errorData.setAlias("调用查微信订单支付信息接口失败！");`
166. `return errorData;`
167. `}`
168. `}`
169. 
170. `/**`
171. `* 关闭订单（刚刚生成的订单不能立马关闭，要间隔5分钟，请自行做好判断）`
172. `*`
173. `* @param outTradeNo`
174. `* 订单号`
175. `* @return`
176. `*/`
177. `public WxAppPayResponseCode closeOrder(String outTradeNo) {`
178. 
179. `logger.info("关闭微信支付订单信息，订单号为：" + outTradeNo);`
180. `HashMap<String, String> data = new HashMap<>();`
181. `data.put("out_trade_no", outTradeNo);`
182. `try {`
183. `Map<String, String> closeOrderMap = wxpay.closeOrder(data);`
184. `return disposeReturnInfo(closeOrderMap);`
185. `} catch (Exception e) {`
186. `e.printStackTrace();`
187. `logger.error("closeOrder : 微信关闭订单失败 。订单号：" + outTradeNo);`
188. `logger.error("closeOrder : 返回错误信息：", e);`
189. `WxAppPayResponseCode errorData = WxAppPayResponseCode.ERROR;`
190. `errorData.setAlias("调用查微信订单支付信息接口失败！");`
191. `return errorData;`
192. `}`
193. `}`
194. 
195. `/**`
196. `* 微信退款申请`
197. `*`
198. `* @param outTradeNo`
199. `* 商户订单号`
200. `* @param amount`
201. `* 金额`
202. `* @param refund_desc`
203. `* 退款原因（可空）`
204. `* @param notifyUrl`
205. `* 退款异步通知链接`
206. `*`
207. `* @return 返回map（已做过签名验证），具体数据参见微信退款API`
208. `*/`
209. `public WxAppPayResponseCode refundOrder(String outTradeNo, BigDecimal amount, String refundDesc, String notifyUrl)`
210. `throws Exception {`
211. 
212. `Map<String, String> data = new HashMap<String, String>();`
213. `data.put("out_trade_no", outTradeNo);`
214. `data.put("out_refund_no", outTradeNo);`
215. `data.put("total_fee", amount + "");`
216. `data.put("refund_fee", amount + "");`
217. `data.put("refund_fee_type", "CNY");`
218. `data.put("refund_desc", refundDesc);`
219. `data.put("notifyUrl", notifyUrl);`
220. 
221. `try {`
222. `Map<String, String> refundOrderMap = wxpay.refund(data);`
223. `return disposeReturnInfo(refundOrderMap);`
224. `} catch (Exception e) {`
225. `e.printStackTrace();`
226. `logger.error("closeOrder : 微信退款申请失败 。订单号：" + outTradeNo);`
227. `logger.error("closeOrder : 返回错误信息：", e);`
228. `WxAppPayResponseCode errorData = WxAppPayResponseCode.ERROR;`
229. `errorData.setAlias("调用微信退款申请信息接口失败！");`
230. `return errorData;`
231. `}`
232. `}`
233. 
234. `/**`
235. `* 查微信退款订单 注：如果单个支付订单部分退款次数超过20次请使用退款单号查询`
236. `*`
237. `* @param outTradeNo`
238. `* 订单号`
239. `*/`
240. `public WxAppPayResponseCode queryRefundOrderByOutTradeNo(String outTradeNo) {`
241. 
242. `logger.info("查询微信支付订单信息，订单号为：" + outTradeNo);`
243. `HashMap<String, String> data = new HashMap<String, String>();`
244. `data.put("out_trade_no", outTradeNo);`
245. `try {`
246. `Map<String, String> refundQueryMap = wxpay.refundQuery(data);`
247. `return disposeReturnInfo(refundQueryMap);`
248. `} catch (Exception e) {`
249. `e.printStackTrace();`
250. `logger.error("queryRefundOrderByOutTradeNo : 查询微信退款订单信息失败 。订单号：" + outTradeNo);`
251. `logger.error("queryRefundOrderByOutTradeNo : 返回错误信息：", e);`
252. `WxAppPayResponseCode errorData = WxAppPayResponseCode.ERROR;`
253. `errorData.setAlias("调用查微信退款订单接口失败！");`
254. `return errorData;`
255. `}`
256. `}`
257. 
258. `/**`
259. `* 对接口接收成功后的返回进行处理`
260. `*`
261. `* @param resultMap`
262. `* @return`
263. `*/`
264. `private WxAppPayResponseCode disposeReturnInfo(Map<String, String> resultMap) {`
265. 
266. `if (resultMap == null`
267. `|| (resultMap != null && WxAppPayResponseCode.FAIL.code().equals(resultMap.get("return_code")))) {`
268. `WxAppPayResponseCode errorData = WxAppPayResponseCode.ERROR;`
269. `errorData.setAlias("调用微信接口失败！返回数据为 : " + resultMap);`
270. `return errorData;`
271. `}`
272. 
273. `if (WxAppPayResponseCode.FAIL.code().equals(resultMap.get("result_code"))) {`
274. `WxAppPayResponseCode errorData = WxAppPayResponseCode.findCode(resultMap.get("err_code"));`
275. `return errorData;`
276. `}`
277. 
278. `WxAppPayResponseCode successData = WxAppPayResponseCode.SUCCESS;`
279. `successData.setAlias(JSONObject.toJSONString(resultMap));`
280. `return successData;`
281. `}`
282. 
283. `/**`
284. `* 是否成功接收微信支付回调 用于回复微信，否则微信回默认为商户后端没有收到回调`
285. `*`
286. `* @return`
287. `*/`
288. `public String returnWXPayVerifyMsg() {`
289. `return "<xml>\n" + "\n" + " <return_code><![CDATA[SUCCESS]]></return_code>\n"`
290. `+ " <return_msg><![CDATA[OK]]></return_msg>\n" + "</xml>";`
291. `}`
292. 
293. `public static void main(String[] args) {`
294. 
295. `WxAppPayRequest pay = new WxAppPayRequest();`
296. `WxAppPayResponseCode orderSign = pay.getOrderSign("APP-商品订单支付", "data1;data2", "212458542512542542",`
297. `new BigDecimal("100.12"), "2019-01-02 23:55:14", 10, "http://XXX");`
298. `System.out.println(orderSign);`
299. `}`
300. 
301. `}`

OK，基本搞定，构建成一个处理微信订单功能的JAR。

项目已推送github：[https://github.com/leopardF/wxpay][https_github.com_leopardF_wxpay]

最后，再次附上本次借鉴的文章：

> [微信APP支付-API列表][APP_-API]
> 
> [微信支付SDK与DEMO下载][https_pay.weixin.qq.com_wiki_doc_api_jsapi.php_chapter_11_1]
> 
> [微信APP支付-JAVA][APP_-JAVA]

如果问题，请提醒修正。

[APP]: https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8_1
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQ3OTkyOTI_size_16_color_FFFFFF_t_70]: /images/20221123/47ab34017c5d49d5b791ce67f45c6206.png
[https_pay.weixin.qq.com_wiki_doc_api_app_app.php_chapter_8_3]: https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8_3
[https_pay.weixin.qq.com_wiki_doc_api_jsapi.php_chapter_11_1]: https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=11_1
[AppID]: https://pay.weixin.qq.com/index.php/extend/pay_setting/ma
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTQ3OTkyOTI_size_16_color_FFFFFF_t_70 1]: /images/20221123/60ebc6bf086f448ebf5f0057a4e8cf2f.png
[https_github.com_leopardF_wxpay]: https://github.com/leopardF/wxpay
[APP_-API]: https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1
[APP_-JAVA]: https://blog.csdn.net/asd54090/article/details/81028323