模型导入、导出逻辑优化

ibzdst-core/src/main/java/cn/ibizlab/core/extensions/service/MetaModelExService.java

@@ -231,10 +231,11 @@ public class MetaModelExService extends MetaModelServiceImpl {
         String strModel = JSON.toJSONString(models);
         File modelFile = generateModelFile(strModel);
         HttpServletResponse resp = ((ServletRequestAttributes) req).getResponse();
-        if (resp != null)
+        if (resp != null){
             resp.setContentType("APPLICATION/OCTET-STREAM");//返回格式为流
             resp.setHeader("Content-Disposition", "attachment;filename=" + getFileName(modelFile.getName()));
-        sendResponse(resp, modelFile);
+            sendResponse(resp, modelFile);
+        }
         return true;
     }
 
@@ -256,17 +257,18 @@ public class MetaModelExService extends MetaModelServiceImpl {
         //  查询模型
         MetaModel metaModel = metaModelService.get(et.getId());
         //  查询模型对应的N个规则
-        for (RuleItem ruleItem : metaModel.getRuleitems()) {
-            JSONObject fieldSet = JSONObject.parseObject(ruleItem.getFieldSet());
-            if (!ObjectUtils.isEmpty(fieldSet)) {
-                for (String entityName : fieldSet.keySet()) {
-                    if (entityName.endsWith("entity")) {
-                        entities.add(fieldSet.getString(entityName));
+        if(!ObjectUtils.isEmpty(metaModel.getRuleitems())){
+            for (RuleItem ruleItem : metaModel.getRuleitems()) {
+                JSONObject fieldSet = JSONObject.parseObject(ruleItem.getFieldSet());
+                if (!ObjectUtils.isEmpty(fieldSet)) {
+                    for (String entityName : fieldSet.keySet()) {
+                        if (entityName.endsWith("entity")) {
+                            entities.add(fieldSet.getString(entityName));
+                        }
                     }
                 }
             }
         }
-
         // 查询模型对应的N个(分析)构建
         if (!ObjectUtils.isEmpty(metaModel.getBuilds())) {
             for (DABuild build : metaModel.getBuilds()) {