官方文档（没有示例）：https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter3_1_5.shtml 那位大佬能提供一下公众号支付完成回调的解密（ java）示例代码，谢谢！

使用demo签名代码，客户端最终还是返回签名失败，示例代码如下，返回结果如图片，谢谢。 [图片][图片] import java.util.UUID; import java.util.Map; import java.util.HashMap; import java.util.Formatter; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; imort java.io.UnsupportedEncodingException;   class Sign {     public static void main(String[] args) {         String jsapi_ticket = "jsapi_ticket";         // 注意 URL 一定要动态获取，不能 hardcode         String url = "http://example.com";         Map<String, String> ret = sign(jsapi_ticket, url);         for (Map.Entry entry : ret.entrySet()) {             System.out.println(entry.getKey() + ", " + entry.getValue());         }     };     public static Map<String, String> sign(String jsapi_ticket, String url) {         Map<String, String> ret = new HashMap<String, String>();         String nonce_str = create_nonce_str();         String timestamp = create_timestamp();         String string1;         String signature = "";         //注意这里参数名必须全部小写，且必须有序         string1 = "jsapi_ticket=" + jsapi_ticket +                   "&noncestr=" + nonce_str +                   "&timestamp=" + timestamp +                   "&url=" + url;         System.out.println(string1);         try         {             MessageDigest crypt = MessageDigest.getInstance("SHA-1");             crypt.reset();             crypt.update(string1.getBytes("UTF-8"));             signature = byteToHex(crypt.digest());         }         catch (NoSuchAlgorithmException e)         {             e.printStackTrace();         }         catch (UnsupportedEncodingException e)         {             e.printStackTrace();         }         ret.put("url", url);         ret.put("jsapi_ticket", jsapi_ticket);         ret.put("nonceStr", nonce_str);         ret.put("timestamp", timestamp);         ret.put("signature", signature);         return ret;     }     private static String byteToHex(final byte[] hash) {         Formatter formatter = new Formatter();         for (byte b : hash)         {             formatter.format("%02x", b);         }         String result = formatter.toString();         formatter.close();         return result;     }     private static String create_nonce_str() {         return UUID.randomUUID().toString();     }     private static String create_timestamp() {         return Long.toString(System.currentTimeMillis() / 1000);     } }

公众号已微信认证，但是分享接口显示未获得，提示需要微信认证

调用接口：https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi 1、部分代码： String token = getToken("POST", httpurl, rootNode.toString()); //请求URL HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi"); StringEntity entity = new StringEntity(rootNode.toString(), "utf-8"); entity.setContentType("application/json"); httpPost.setEntity(entity); httpPost.setHeader("Accept", "application/json"); httpPost.setHeader("Authorization", schema + " " + token); CloseableHttpClient httpClient = HttpClientBuilder.create().build(); //完成签名并执行请求 CloseableHttpResponse response = httpClient.execute(httpPost); try { int statusCode = response.getStatusLine().getStatusCode(); if (statusCode == 200) { System.out.println("success,return body = " + EntityUtils.toString(response.getEntity())); } else if (statusCode == 204) { System.out.println("success"); } else { System.out.println("failed,resp code = " + statusCode + ",return body = " + EntityUtils.toString(response.getEntity())); throw new IOException("request failed"); } } finally { response.close(); httpClient.close(); } 2、token的获取方式（官方代码）： String getToken(String method, HttpUrl url, String body) throws IOException, NoSuchAlgorithmException, SignatureException, InvalidKeyException { String nonceStr = UUID.randomUUID().toString().replace("-", ""); long timestamp = System.currentTimeMillis() / 1000; String message = buildMessage(method, url, timestamp, nonceStr, body); String signature = sign(message.getBytes("utf-8")); return "mchid=\"" + mchId + "\"," + "nonce_str=\"" + nonceStr + "\"," + "timestamp=\"" + timestamp + "\"," + "serial_no=\"" + serialNo2 + "\"," + "signature=\"" + signature + "\""; } 3、报如下错误： { "code": "SIGN_ERROR", "detail": { "detail": { "issue": "sign not match" }, "field": "signature", "location": "authorization", "sign_information": { "method": "POST", "sign_message_length": 311, "truncated_sign_message": "POST\n/v3/pay/transactions/jsapi\n1730605701\nc34438f0221f4cd8800e25cb237ba36e\n{\"mchid\"\n }, "url": "/v3/pay/transactions/jsapi" }, "message": "签名错误，请检查后再试" }

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