diff --git a/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/StoRouteQueryUtil.java b/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/StoRouteQueryUtil.java
index 171bc9b..6a87f4c 100644
--- a/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/StoRouteQueryUtil.java
+++ b/ruoyi-oa/src/main/java/com/ruoyi/oa/utils/StoRouteQueryUtil.java
@@ -14,13 +14,14 @@ import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
+import java.net.URLEncoder;
 
 public class StoRouteQueryUtil {
     // 请填写你自己的key/secret
-    private static final String APP_KEY = "CAKWRqzGkVRVVFj";
-    private static final String APP_SECRET = "";
-    private static final String FROM_CODE = ""; // 你的from_code
-    private static final String API_URL = "http://cloudinter-linkgatewaytest.sto.cn/gateway/link.do";
+    private static final String APP_KEY = "CAKDSqybdwbzlUC";
+    private static final String APP_SECRET = "wGRMVXwIf8sp4m4W6tWJcOaDfY7EPblQ";
+    private static final String FROM_CODE = "CAKDSqybdwbzlUC"; // 你的from_code
+    private static final String API_URL = "https://cloudinter-linkgateway.sto.cn/gateway/link.do";
 
     // 申通签名算法 body+appSecret，MD5后Base64
     public static String sign(String body, String secret) {
@@ -44,26 +45,27 @@ public class StoRouteQueryUtil {
             content.put("waybillNoList", waybillNoList);
             String contentStr = content.toJSONString();
 
-            // 构造请求参数
-            JSONObject params = new JSONObject();
-            params.put("api_name", "STO_TRACE_QUERY_COMMON");
-            params.put("content", contentStr);
-            params.put("from_appkey", APP_KEY);
-            params.put("from_code", FROM_CODE);
-            params.put("to_appkey", "sto_trace_query");
-            params.put("to_code", "sto_trace_query");
-            params.put("data_digest", sign(contentStr, APP_SECRET));
+            // 构造表单参数字符串
+            StringBuilder form = new StringBuilder();
+            form.append("api_name=STO_TRACE_QUERY_COMMON");
+            form.append("&content=").append(URLEncoder.encode(contentStr, "UTF-8"));
+            form.append("&from_appkey=").append(APP_KEY);
+            form.append("&from_code=").append(APP_KEY);
+            form.append("&to_appkey=sto_trace_query");
+            form.append("&to_code=sto_trace_query");
+            form.append("&data_digest=").append(URLEncoder.encode(sign(contentStr, APP_SECRET), "UTF-8"));
+
+            System.out.println("申通表单请求体：" + form);
 
-            String jsonParams = params.toJSONString();
             URL url = new URL(API_URL);
             HttpURLConnection conn = (HttpURLConnection) url.openConnection();
             conn.setDoOutput(true);
             conn.setDoInput(true);
             conn.setUseCaches(false);
             conn.setRequestMethod("POST");
-            conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
+            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
             OutputStream out = conn.getOutputStream();
-            out.write(jsonParams.getBytes(StandardCharsets.UTF_8));
+            out.write(form.toString().getBytes(StandardCharsets.UTF_8));
             out.flush();
             out.close();
             StringBuilder sbResult = new StringBuilder();
@@ -89,6 +91,11 @@ public class StoRouteQueryUtil {
         if (result == null || result.trim().isEmpty()) {
             return null;
         }
+        // 新增：如果返回是XML，直接打印并返回null
+        if (result.trim().startsWith("<")) {
+            System.err.println("申通返回XML错误：" + result);
+            return null;
+        }
         try {
             JSONObject json = JSON.parseObject(result);
             JSONObject data = json.getJSONObject("data");
@@ -113,7 +120,7 @@ public class StoRouteQueryUtil {
     // main方法测试
     public static void main(String[] args) {
         List<String> waybillNos = new ArrayList<>();
-        waybillNos.add("777031922725111"); // 测试单号
+        waybillNos.add("777325378857266"); // 测试单号
         String result = queryRoute(waybillNos);
         System.out.println("申通原始返回：" + result);
         OaExpressVo vo = parseData(result);