diff --git a/src/me/xixu/DataBase/TableOperate.java b/src/me/xixu/DataBase/TableOperate.java
index bc20cc0..1912e01 100644
--- a/src/me/xixu/DataBase/TableOperate.java
+++ b/src/me/xixu/DataBase/TableOperate.java
@@ -1,4 +1,4 @@
-package me.xixu.DataBase;
+package me.xixu.database;
 
 import java.sql.Connection;
 import java.sql.DriverManager;
@@ -7,7 +7,7 @@ import java.sql.ResultSet;
 import java.sql.Statement;
 
 import me.xixu.Book;
-import me.xixu.Static.Information;
+import me.xixu.info.Information;
 
 public class TableOperate {
 
diff --git a/src/me/xixu/MainInterface.java b/src/me/xixu/MainInterface.java
index 05bf1d1..349c68b 100644
--- a/src/me/xixu/MainInterface.java
+++ b/src/me/xixu/MainInterface.java
@@ -17,20 +17,20 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 import javax.swing.border.EmptyBorder;
 
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Manager.InsertBook;
-import me.xixu.Manager.ManagerInterface;
-import me.xixu.Manager.NewClass;
-import me.xixu.Manager.State;
-import me.xixu.Manager.State_Information;
-import me.xixu.Manager.UpdateBook;
-import me.xixu.Static.Information;
-import me.xixu.User.BorrowBook;
-import me.xixu.User.BorrowBook_Information;
-import me.xixu.User.PersonalInformation;
-import me.xixu.User.ProlongBook;
-import me.xixu.User.ReturnBook;
-import me.xixu.User.UserInterface;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
+import me.xixu.manager.InsertBook;
+import me.xixu.manager.ManagerInterface;
+import me.xixu.manager.NewClass;
+import me.xixu.manager.State;
+import me.xixu.manager.State_Information;
+import me.xixu.manager.UpdateBook;
+import me.xixu.user.BorrowBook;
+import me.xixu.user.BorrowBook_Information;
+import me.xixu.user.PersonalInformation;
+import me.xixu.user.ProlongBook;
+import me.xixu.user.ReturnBook;
+import me.xixu.user.UserInterface;
 
 public class MainInterface extends JFrame implements ActionListener {
 
diff --git a/src/me/xixu/Manager/InsertBook.java b/src/me/xixu/Manager/InsertBook.java
index f50b224..ad8e898 100644
--- a/src/me/xixu/Manager/InsertBook.java
+++ b/src/me/xixu/Manager/InsertBook.java
@@ -1,4 +1,4 @@
-package me.xixu.Manager;
+package me.xixu.manager;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,7 +13,7 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
+import me.xixu.database.TableOperate;
 
 public class InsertBook extends JPanel implements ActionListener {
 	private JTextField tf_number;
diff --git a/src/me/xixu/Manager/ManagerInterface.java b/src/me/xixu/Manager/ManagerInterface.java
index cbe6b71..00328f0 100644
--- a/src/me/xixu/Manager/ManagerInterface.java
+++ b/src/me/xixu/Manager/ManagerInterface.java
@@ -1,4 +1,4 @@
-package me.xixu.Manager;
+package me.xixu.manager;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -11,7 +11,7 @@ import javax.swing.JPanel;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.Static.Information;
+import me.xixu.info.Information;
 
 public class ManagerInterface extends JPanel implements ActionListener {
 	private JLabel label;
diff --git a/src/me/xixu/Manager/NewClass.java b/src/me/xixu/Manager/NewClass.java
index 7a47880..0fe0f66 100644
--- a/src/me/xixu/Manager/NewClass.java
+++ b/src/me/xixu/Manager/NewClass.java
@@ -1,4 +1,4 @@
-package me.xixu.Manager;
+package me.xixu.manager;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,7 +13,7 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
+import me.xixu.database.TableOperate;
 
 public class NewClass extends JPanel implements ActionListener {
 	private JLabel label;
diff --git a/src/me/xixu/Manager/State.java b/src/me/xixu/Manager/State.java
index db4bcfe..37fa8cd 100644
--- a/src/me/xixu/Manager/State.java
+++ b/src/me/xixu/Manager/State.java
@@ -1,4 +1,4 @@
-package me.xixu.Manager;
+package me.xixu.manager;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,8 +13,8 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Static.Information;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
 
 public class State extends JPanel implements ActionListener {
 	private JLabel label;
diff --git a/src/me/xixu/Manager/State_Information.java b/src/me/xixu/Manager/State_Information.java
index 2fce0dc..b2d0d74 100644
--- a/src/me/xixu/Manager/State_Information.java
+++ b/src/me/xixu/Manager/State_Information.java
@@ -1,4 +1,4 @@
-package me.xixu.Manager;
+package me.xixu.manager;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -10,7 +10,7 @@ import javax.swing.JPanel;
 import javax.swing.JTextArea;
 
 import me.xixu.MainInterface;
-import me.xixu.Static.Information;
+import me.xixu.info.Information;
 
 public class State_Information extends JPanel implements ActionListener {
 	private JButton back;
diff --git a/src/me/xixu/Manager/UpdateBook.java b/src/me/xixu/Manager/UpdateBook.java
index 39e2d5c..46e317b 100644
--- a/src/me/xixu/Manager/UpdateBook.java
+++ b/src/me/xixu/Manager/UpdateBook.java
@@ -1,4 +1,4 @@
-package me.xixu.Manager;
+package me.xixu.manager;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,7 +13,7 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
+import me.xixu.database.TableOperate;
 
 public class UpdateBook extends JPanel implements ActionListener {
 	private JTextField tf_old_number;
diff --git a/src/me/xixu/User/BorrowBook.java b/src/me/xixu/User/BorrowBook.java
index e5b94ca..90caf11 100644
--- a/src/me/xixu/User/BorrowBook.java
+++ b/src/me/xixu/User/BorrowBook.java
@@ -1,4 +1,4 @@
-package me.xixu.User;
+package me.xixu.user;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,8 +13,8 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Static.Information;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
 
 public class BorrowBook extends JPanel implements ActionListener {
 	private JLabel label;
diff --git a/src/me/xixu/User/BorrowBook_Information.java b/src/me/xixu/User/BorrowBook_Information.java
index b2336d4..cab83d6 100644
--- a/src/me/xixu/User/BorrowBook_Information.java
+++ b/src/me/xixu/User/BorrowBook_Information.java
@@ -1,4 +1,4 @@
-package me.xixu.User;
+package me.xixu.user;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,8 +13,8 @@ import javax.swing.JTextArea;
 import javax.swing.JTextField;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Static.Information;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
 
 public class BorrowBook_Information extends JPanel implements ActionListener {
 	private JButton back;
diff --git a/src/me/xixu/User/PersonalInformation.java b/src/me/xixu/User/PersonalInformation.java
index 00b6efb..2cfc0b3 100644
--- a/src/me/xixu/User/PersonalInformation.java
+++ b/src/me/xixu/User/PersonalInformation.java
@@ -1,4 +1,4 @@
-package me.xixu.User;
+package me.xixu.user;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -12,7 +12,7 @@ import javax.swing.JTextArea;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.Static.Information;
+import me.xixu.info.Information;
 
 public class PersonalInformation extends JPanel implements ActionListener {
 	private JButton back;
diff --git a/src/me/xixu/User/ProlongBook.java b/src/me/xixu/User/ProlongBook.java
index a4baf5d..3ec8ad2 100644
--- a/src/me/xixu/User/ProlongBook.java
+++ b/src/me/xixu/User/ProlongBook.java
@@ -1,4 +1,4 @@
-package me.xixu.User;
+package me.xixu.user;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -12,8 +12,8 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Static.Information;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
 
 public class ProlongBook extends JPanel implements ActionListener {
 	private JButton back;
diff --git a/src/me/xixu/User/ReturnBook.java b/src/me/xixu/User/ReturnBook.java
index 59328c7..16ed861 100644
--- a/src/me/xixu/User/ReturnBook.java
+++ b/src/me/xixu/User/ReturnBook.java
@@ -1,4 +1,4 @@
-package me.xixu.User;
+package me.xixu.user;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -13,8 +13,8 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Static.Information;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
 
 public class ReturnBook extends JPanel implements ActionListener {
 	private JLabel label;
diff --git a/src/me/xixu/User/UserInterface.java b/src/me/xixu/User/UserInterface.java
index 5c51dc7..50423a8 100644
--- a/src/me/xixu/User/UserInterface.java
+++ b/src/me/xixu/User/UserInterface.java
@@ -1,4 +1,4 @@
-package me.xixu.User;
+package me.xixu.user;
 
 import java.awt.Color;
 import java.awt.Font;
@@ -11,8 +11,8 @@ import javax.swing.JPanel;
 import javax.swing.SwingConstants;
 
 import me.xixu.MainInterface;
-import me.xixu.DataBase.TableOperate;
-import me.xixu.Static.Information;
+import me.xixu.database.TableOperate;
+import me.xixu.info.Information;
 
 public class UserInterface extends JPanel implements ActionListener {
 	private JButton back;
diff --git a/src/me/xixu/Static/Information.java b/src/me/xixu/info/Information.java
similarity index 96%
rename from src/me/xixu/Static/Information.java
rename to src/me/xixu/info/Information.java
index 2f3e9e8..06e3d57 100644
--- a/src/me/xixu/Static/Information.java
+++ b/src/me/xixu/info/Information.java
@@ -1,4 +1,4 @@
-package me.xixu.Static;
+package me.xixu.info;
 
 import java.util.ArrayList;