diff --git a/IDeptService.java b/IDeptService.java
new file mode 100644
index 0000000..967aa3d
--- /dev/null
+++ b/IDeptService.java
@@ -0,0 +1,19 @@
+package com.prj.service;
+
+import java.util.List;
+import com.prj.domain.Dept;
+
+public interface IDeptService
+{
+    public Dept selectDeptById(Long id);
+
+    public List<Dept> selectDeptList(Dept dept);
+
+    public int insertDept(Dept dept);
+
+    public int updateDept(Dept dept);
+
+    public int deleteDeptByIds(Long[] ids);
+}
+
+