diff --git a/src/main/java/Main.kt b/src/main/java/Main.kt
index 9531dc1..72e44b6 100644
--- a/src/main/java/Main.kt
+++ b/src/main/java/Main.kt
@@ -1,8 +1,6 @@
 import com.jfinal.plugin.activerecord.ActiveRecordPlugin
 import com.jfinal.plugin.druid.DruidPlugin
-import model.JFinalModelMenu
-import model.JFinalModelUser
-import model.JSONResponse
+import model.*
 import org.slf4j.LoggerFactory
 import ro.pippo.controller.ControllerApplication
 import ro.pippo.core.Pippo
@@ -91,6 +89,9 @@ class BasicApplication : ControllerApplication() {
         val arp = ActiveRecordPlugin(dp)
         arp.addMapping("menu", JFinalModelMenu::class.java)
         arp.addMapping("user", JFinalModelUser::class.java)
+        arp.addMapping("group", JFinalModelGroup::class.java)
+        arp.addMapping("perm", JFinalModelPerm::class.java)
+        arp.addMapping("role", JFinalModelRole::class.java)
         dp.start()
         arp.start()
 
diff --git a/src/main/java/model/Model.kt b/src/main/java/model/Model.kt
index 76b268b..29a85a1 100644
--- a/src/main/java/model/Model.kt
+++ b/src/main/java/model/Model.kt
@@ -29,12 +29,13 @@ data class ModelUser(val id: Int?, var name: String?, var passwd: String?, val g
     constructor() : this(null, null, null, -1, -1, null)
 }
 
-data class ModelGroup(val id: Int?, val description: String, val createTime: Timestamp?) {
+data class ModelGroup(val id: Int?, val description: String, val parentId: Int?, val createTime: Timestamp?) {
     companion object {
         fun fromJFinal(model: Model<*>): ModelGroup {
             return ModelGroup(
                     id = model.getInt("id"),
                     description = model.getStr("description"),
+                    parentId = model.getInt("parentId"),
                     createTime = model.getTimestamp("createTime")
             )
         }
@@ -48,7 +49,7 @@ data class ModelGroup(val id: Int?, val description: String, val createTime: Tim
         return model
     }
 
-    constructor() : this(null, "", null)
+    constructor() : this(null, "", -1, null)
 }
 
 data class ModelPerm(val id: Int?, val description: String?, val perm: String?, val createTime: Timestamp?) {
diff --git a/src/main/java/service/Service.kt b/src/main/java/service/Service.kt
index 33174cb..79dbfa1 100644
--- a/src/main/java/service/Service.kt
+++ b/src/main/java/service/Service.kt
@@ -7,6 +7,8 @@ import com.jfinal.plugin.activerecord.Record
 import model.*
 import sun.reflect.generics.reflectiveObjects.NotImplementedException
 import util.*
+import java.sql.Timestamp
+import java.util.*
 import kotlin.reflect.KClass
 import kotlin.reflect.full.companionObjectInstance
 import kotlin.reflect.full.functions
@@ -43,6 +45,8 @@ class Service {
 
     fun save(cls: KClass<*>, instance: Any): Boolean {
         val model = instance::class.functions.filter { "toJFinal" == it.name }.first().call(instance) as Model<*>
+        model.set("createTime", Timestamp(Date().time))
+        model.remove("id")
         return model.save()
     }
 
@@ -304,18 +308,7 @@ class Service {
 
     @Deprecated("")
     fun saveGroup(group: ModelGroup): Boolean {
-        val conn = DBUtil.getConnection()
-        try {
-            println(groupToInsertSQL(group))
-            conn.createStatement()
-                    .execute(groupToInsertSQL(group))
-            return true
-        } catch (e: Exception) {
-            e.printStackTrace()
-            return false
-        } finally {
-            conn.close()
-        }
+        return save(ModelGroup::class, group)
     }
 
     @Deprecated("")
diff --git a/src/main/java/util/Util.kt b/src/main/java/util/Util.kt
index 9979300..439800a 100644
--- a/src/main/java/util/Util.kt
+++ b/src/main/java/util/Util.kt
@@ -76,6 +76,7 @@ fun rsToGroup(rs: ResultSet): ModelGroup {
     return ModelGroup(
             id = rs.getInt("id"),
             description = rs.getString("description"),
+            parentId = rs.getInt("parentId"),
             createTime = rs.getTimestamp("createTime")
     )
 }