修改配置

service/src/main/java/cn/qihangerp/service/external/pdd/ExternalPddPublishService.java

@@ -126,7 +126,7 @@ public class ExternalPddPublishService {
         if (props.isAutoFetchCatRule() && !catFetched) {
             try {
                 JSONObject body = new JSONObject();
-                body.put("cat_id", catId);
+                body.put("cat_id", String.valueOf(catId));
                 String raw = pddPopClient.invoke(gateway, cred.getAppKey(), cred.getAppSecret(), cred.getAccessToken(),
                         "pdd.goods.cat.rule.get", JSON.toJSONString(body));
                 catRuleSnippet = PddOpenApiSupport.snippet(raw, 2000);

service/src/main/java/cn/qihangerp/service/external/pdd/PddCatRuleSpecAutoResolver.java

@@ -72,8 +72,12 @@ public class PddCatRuleSpecAutoResolver {
      * 调用 pdd.goods.cat.rule.get
      */
     public String fetchCatRuleJson(PddShopCredential cred, String gatewayUrl, long catId) throws Exception {
+        if (catId <= 0) {
+            throw new IllegalArgumentException("cat_id 必须为正数，当前=" + catId);
+        }
         JSONObject p = new JSONObject();
-        p.put("cat_id", catId);
+        // 与 POP 文档示例一致：param_json 内 cat_id 使用字符串，避免网关报「cat_id 不能为空」
+        p.put("cat_id", String.valueOf(catId));
         return popClient.invoke(
                 gatewayUrl,
                 cred.getAppKey(),
@@ -102,7 +106,7 @@ public class PddCatRuleSpecAutoResolver {
                 throw new IllegalStateException("无法解析 SKU 规格名：outSkuId=" + row.getOuterErpSkuId());
             }
             JSONObject p = new JSONObject();
-            p.put("cat_id", catId);
+            p.put("cat_id", String.valueOf(catId));
             p.put("parent_spec_id", parentSpecId);
             p.put("spec_name", specName.trim());
 

service/src/main/java/cn/qihangerp/service/external/pdd/PddGoodsAddParamBuilder.java

@@ -14,6 +14,7 @@ import java.math.BigDecimal;
 import java.math.RoundingMode;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 
 /**
  * 将 Canonical 落库结果组装为 pdd.goods.add 的 param_json。
@@ -55,7 +56,8 @@ public class PddGoodsAddParamBuilder {
 
         JSONObject root = new JSONObject();
         root.put("auto_fill_spu_property", true);
-        root.put("cat_id", catId);
+        // POP 文档示例多为字符串型 cat_id，网关对纯数字字段部分场景校验更稳
+        root.put("cat_id", String.valueOf(catId));
         root.put("cost_template_id", costTpl);
         root.put("country_id", props.getDefaultCountryId());
         root.put("goods_type", props.getDefaultGoodsType());
@@ -154,11 +156,27 @@ public class PddGoodsAddParamBuilder {
         return props.getDefaultShipmentLimitSecond();
     }
 
+    /**
+     * categoryCode 对应映射须为正数；若键存在但值为 null/≤0，再尝试 {@code DEFAULT}。
+     */
     private static Long resolveCatId(String categoryCode, ExternalPddProperties props) {
-        if (StringUtils.hasText(categoryCode) && props.getCategoryMap().containsKey(categoryCode)) {
-            return props.getCategoryMap().get(categoryCode);
+        Map<String, Long> m = props.getCategoryMap();
+        if (m == null || m.isEmpty()) {
+            return null;
         }
-        return props.getCategoryMap().get("DEFAULT");
+        Long v = pickPositiveCatId(m, categoryCode);
+        if (v != null) {
+            return v;
+        }
+        return pickPositiveCatId(m, "DEFAULT");
+    }
+
+    private static Long pickPositiveCatId(Map<String, Long> m, String key) {
+        if (!StringUtils.hasText(key) || !m.containsKey(key)) {
+            return null;
+        }
+        Long v = m.get(key);
+        return (v != null && v > 0) ? v : null;
     }
 
     private static Long resolveCostTemplate(String logisticsTemplateCode, ExternalPddProperties props) {