优化

sapi/src/main/java/com/xhkjedu/sapi/service/system/SchoolService.java

@@ -502,7 +502,7 @@ public class SchoolService {
             for(Map.Entry<String, List<Map>> entryg : grademap.entrySet()){
                 Map gmap = new LinkedHashMap();
                 gmap.put("gradeid",Integer.parseInt(entryg.getKey()));
-                List<Map> classlist = entry.getValue();
+                List<Map> classlist = entryg.getValue();
                 for(Map cmap : classlist){
                     cmap.remove("schoolid");
                     cmap.remove("schoolname");