init

src/main/kotlin/mvc/dao/UserRepository.kt

@@ -0,0 +1,23 @@
+package mvc.dao
+
+import mvc.entities.User
+
+class UserRepository {
+    val users = mutableMapOf<Long, User>()
+
+    init {
+        add(User(1L, "nian", "chen"))
+    }
+
+    fun add(user: User) {
+        users += user.id to user
+    }
+
+    fun findById(id: Long): User? {
+        return users[id]
+    }
+
+    fun update(user: User) {
+        users[user.id] = user
+    }
+}