bugfix

modules/ibizlab-generator-core/src/main/java/cn/ibizlab/codegen/model/SystemModel.java

@@ -223,6 +223,8 @@ public class SystemModel extends BaseModel {
     public synchronized Map<String, SubServiceApiModel> getSubServiceApiMap() {
         if (subServiceApiMap == null) {
             subServiceApiMap = new LinkedHashMap<>();
+            if(getSystem().getAllPSSubSysServiceAPIs()!=null)
+            {
                 getSystem().getAllPSSubSysServiceAPIs().forEach(subSysServiceAPI -> {
                     SubServiceApiModel subapi=new SubServiceApiModel(subSysServiceAPI).setSystem(this);
                     subServiceApiMap.put(subSysServiceAPI.getCodeName(), subapi);
@@ -239,6 +241,8 @@ public class SystemModel extends BaseModel {
 
                 });
             }
+
+        }
         return subServiceApiMap;
     }