diff --git a/src/main/java/com/example/cosmos_serversb/models/Groups.java b/src/main/java/com/example/cosmos_serversb/models/Groups.java
index 4912efd..f779544 100644
--- a/src/main/java/com/example/cosmos_serversb/models/Groups.java
+++ b/src/main/java/com/example/cosmos_serversb/models/Groups.java
@@ -4,13 +4,44 @@
 import javax.inject.Singleton;
 
 import com.example.cosmos_serversb.entities.*;
-
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 
 @Singleton
 public class Groups {
     private static Groups theInstance = null;
     private static ArrayList<Group> groups = new ArrayList<>();
 
+    private static SessionFactory sessionFactory;
+
+    public static void setUp() {
+        // A SessionFactory is set up once for an application!
+        final StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
+                .configure() // configures settings from hibernate.cfg.xml
+                .build();
+        try {
+            sessionFactory = new MetadataSources( registry ).buildMetadata().buildSessionFactory();
+        }
+        catch (Exception e) {
+            // The registry would be destroyed by the SessionFactory, but we had trouble building the SessionFactory
+            // so destroy it manually.
+            StandardServiceRegistryBuilder.destroy( registry );
+        }
+    }
+
+    public static void tearDown() {
+        try {
+            if ( sessionFactory != null ) {
+                sessionFactory.close();
+            }
+        } catch (Exception e) {
+            System.out.println("Exception!");
+        }
+    }
+
     private Groups(){
 
     }
@@ -29,18 +60,29 @@
     public static Group createGroup(String name, String uId){
         //先にGidとuriの発行を行う
         Group testGroup = new Group("123456789", "http://test.com", name, uId);
-        groups.add(testGroup);
+        Session session = sessionFactory.openSession();
+        session.beginTransaction();
+        session.save(testGroup);
+        session.getTransaction().commit();
+        session.close();
         return testGroup;
     }
 
     public static Group getGroupByGid(String gId){
         Group editGroup;
-        for (int i = 0; i < groups.size(); i++) {
-            editGroup = groups.get(i);
+        Session session = sessionFactory.openSession();
+        session.beginTransaction();
+        List groupResult = session.createQuery( "from Group" ).list();
+        for ( Group group : (List<Group>) groupResult ) {
+            editGroup = group;
             if (editGroup.getgId().equals(gId)) {
+                session.getTransaction().commit();
+                session.close();
                 return editGroup;
             }
         }
+        session.getTransaction().commit();
+        session.close();
         return null;
     }
 
@@ -104,7 +146,8 @@
         for (String key : TestMap.keySet()) {
             System.out.println(key + " " + TestMap.get(key));
         }
-        */
+         */
+
         return testMap;
     }