diff --git a/src/com/littleheap/Book.java b/src/com/littleheap/Book.java
index d3703a1..aa22ac9 100644
--- a/src/com/littleheap/Book.java
+++ b/src/com/littleheap/Book.java
@@ -5,6 +5,7 @@ public class Book {
 	public String classnumber;
 	public String name;
 	public String classname;
+	public String author;
 	public String price;
 	public String state;
 	public String total;
diff --git a/src/com/littleheap/DataBase/TableOperate.java b/src/com/littleheap/DataBase/TableOperate.java
index 3568f1d..a80b7fb 100644
--- a/src/com/littleheap/DataBase/TableOperate.java
+++ b/src/com/littleheap/DataBase/TableOperate.java
@@ -8,23 +8,23 @@
 
 public class TableOperate {
 	
-	//Êý¾Ý¿â²éѯÁ¬½ÓÄ£°å
+	//���ݿ��ѯ����ģ��
 	public TableOperate() {
 		try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯£¡");
+            System.out.println("�ɹ�����MySQL������");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â£¡");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ⣡");
 
-            String sql = "select * from temp";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
-                System.out.println("±àºÅ"+"\t"+"ÐÕÃû"+"\t"+"ÄêÁä");
+            String sql = "select * from temp";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
+                System.out.println("���"+"\t"+"����"+"\t"+"����");
                 while (rs.next()){
                     System.out.print(rs.getInt(1) + "\t");
                     System.out.print(rs.getString(2) + "\t");
@@ -40,23 +40,23 @@ public TableOperate() {
             }
 	}
     
-	//ÊÇ·ñ´æÔÚ¸ÃÓû§
+	//�Ƿ���ڸ��û�
     public static boolean isExist_Customer(String user,String password) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-isExist_Customer");
+            System.out.println("�ɹ�����MySQL����-isExist_Customer");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-isExist_Customer");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-isExist_Customer");
 
-            String sql = "select * from Customer";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
-                System.out.println("Óû§Ãû"+"\t"+"\t"+"\t"+"ÃÜÂë");
+            String sql = "select * from Customer";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
+                System.out.println("�û���"+"\t"+"\t"+"\t"+"����");
                 while (rs.next()){
                     System.out.print(rs.getString(1) + "\t");
                     System.out.print(rs.getString(2) + "\t");
@@ -78,23 +78,23 @@ public static boolean isExist_Customer(String user,String password) {
 		return false;
     }
     
-    //ÊÇ·ñ´æÔڸùÜÀíÔ±
+    //�Ƿ���ڸù���Ա
     public static boolean isExist_Manager(String user,String password) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-isExist_Manager");
+            System.out.println("�ɹ�����MySQL����-isExist_Manager");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-isExist_Manager");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-isExist_Manager");
 
-            String sql = "select * from Manager";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
-                System.out.println("Óû§Ãû"+"\t"+"\t"+"\t"+"ÃÜÂë");
+            String sql = "select * from Manager";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
+                System.out.println("�û���"+"\t"+"\t"+"\t"+"����");
                 while (rs.next()){
                     System.out.print(rs.getString(1) + "\t");
                     System.out.print(rs.getString(2) + "\t");
@@ -116,21 +116,21 @@ public static boolean isExist_Manager(String user,String password) {
 		return false;
     }
 
-    //×¢²áÐÂÓû§
+    //ע�����û�
     public static void regist_Customer(String user,String password) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-regist_Customer");
+            System.out.println("�ɹ�����MySQL����-regist_Customer");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-regist_Customer");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-regist_Customer");
 
-            String sql = "insert into Customer values('"+user+"','"+password+"');";    //ÒªÖ´ÐеÄSQL
+            String sql = "insert into Customer values('"+user+"','"+password+"');";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -144,21 +144,21 @@ public static void regist_Customer(String user,String password) {
             }
     }
     
-    //×¢²áйÜÀíÔ±
+    //ע���¹���Ա
     public static void regist_Manager(String user,String password) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-regist_Manager");
+            System.out.println("�ɹ�����MySQL����-regist_Manager");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-regist_Manager");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-regist_Manager");
 
-            String sql = "insert into Manager values('"+user+"','"+password+"');";    //ÒªÖ´ÐеÄSQL
+            String sql = "insert into Manager values('"+user+"','"+password+"');";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -172,21 +172,21 @@ public static void regist_Manager(String user,String password) {
             }
     }
     
-    //¸Ä±äÓû§µÄÃÜÂë
+    //�ı��û�������
     public static void changePassword_Customer(String user,String password,String newPassword) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-changePassword");
+            System.out.println("�ɹ�����MySQL����-changePassword");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-changePassword");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-changePassword");
 
-            String sql = "update Customer set customer_password = '"+newPassword+"' where customer_user = '"+user+"';";    //ÒªÖ´ÐеÄSQL
+            String sql = "update Customer set customer_password = '"+newPassword+"' where customer_user = '"+user+"';";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -200,21 +200,21 @@ public static void changePassword_Customer(String user,String password,String ne
             }
     }
     
-    //¸Ä±ä¹ÜÀíÔ±µÄÃÜÂë
+    //�ı����Ա������
     public static void changePassword_Manager(String user,String password,String newPassword) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-changePassword");
+            System.out.println("�ɹ�����MySQL����-changePassword");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-changePassword");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-changePassword");
 
-            String sql = "update Manager set manager_password = '"+newPassword+"' where manager_user = '"+user+"';";    //ÒªÖ´ÐеÄSQL
+            String sql = "update Manager set manager_password = '"+newPassword+"' where manager_user = '"+user+"';";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -228,23 +228,23 @@ public static void changePassword_Manager(String user,String password,String new
             }
     }
 
-    //ÊÇ·ñ´æÔÚ¸ÃÓû§Ãû
+    //�Ƿ���ڸ��û���
     public static boolean isExist_Customer_user(String user,String password) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-isExist_Customer");
+            System.out.println("�ɹ�����MySQL����-isExist_Customer");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-isExist_Customer");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-isExist_Customer");
 
-            String sql = "select * from Customer";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
-                System.out.println("Óû§Ãû"+"\t"+"\t"+"\t"+"ÃÜÂë");
+            String sql = "select * from Customer";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
+                System.out.println("�û���"+"\t"+"\t"+"\t"+"����");
                 while (rs.next()){
                     System.out.print(rs.getString(1) + "\t");
                     System.out.print(rs.getString(2) + "\t");
@@ -266,23 +266,23 @@ public static boolean isExist_Customer_user(String user,String password) {
 		return false;
     }
 
-    //ÊÇ·ñ´æÔڸùÜÀíÔ±Ãû³Æ
+    //�Ƿ���ڸù���Ա����
     public static boolean isExist_Manager_user(String user,String password) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-isExist_Manager");
+            System.out.println("�ɹ�����MySQL����-isExist_Manager");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-isExist_Manager");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-isExist_Manager");
 
-            String sql = "select * from Manager";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
-                System.out.println("Óû§Ãû"+"\t"+"\t"+"\t"+"ÃÜÂë");
+            String sql = "select * from Manager";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
+                System.out.println("�û���"+"\t"+"\t"+"\t"+"����");
                 while (rs.next()){
                     System.out.print(rs.getString(1) + "\t");
                     System.out.print(rs.getString(2) + "\t");
@@ -304,21 +304,21 @@ public static boolean isExist_Manager_user(String user,String password) {
 		return false;
     }
     
-    //²åÈëÐÂÊé
-    public static void insertBook(String number,String classnumber,String name,String classname,String price,String state,String total) {
+    //��������
+    public static void insertBook(String number,String classnumber,String name,String classname,String author,String price,String state,String total) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-insertBook");
+            System.out.println("�ɹ�����MySQL����-insertBook");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-insertBook");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-insertBook");
 
-            String sql = "insert into "+classname+"Book"+" values('"+number+"','"+classnumber+"','"+name+"','"+classname+"','"+price+"','"+state+"','"+total+"','null','null','null');";    //ÒªÖ´ÐеÄSQL
+            String sql = "insert into "+classname+"Book"+" values('"+number+"','"+classnumber+"','"+name+"','"+classname+"','"+author+"','"+price+"','"+state+"','"+total+"','null','null','null');";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -332,21 +332,21 @@ public static void insertBook(String number,String classnumber,String name,Strin
             }
     }
 
-    //н¨Àà±ð
+    //�½����
     public static void newClass(String classnumber, String classname) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-newClass");
+            System.out.println("�ɹ�����MySQL����-newClass");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-newClass");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-newClass");
 
-            String sql = "CREATE TABLE "+classname+"Book(number VARCHAR(255) primary key,classnumber VARCHAR(255),name VARCHAR(255),classname VARCHAR(255),price VARCHAR(255),state VARCHAR(255),total VARCHAR(255),current VARCHAR(255),dateon VARCHAR(255),dateoff VARCHAR(255));";    //ÒªÖ´ÐеÄSQL
+            String sql = "CREATE TABLE "+classname+"Book(number VARCHAR(255) primary key,classnumber VARCHAR(255),name VARCHAR(255),classname VARCHAR(255),author VARCHAR(255),price VARCHAR(255),state VARCHAR(255),total VARCHAR(255),current VARCHAR(255),dateon VARCHAR(255),dateoff VARCHAR(255));";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -360,21 +360,21 @@ public static void newClass(String classnumber, String classname) {
             }
     }
     
-    //ɾ³ýÊé¼®ÐÅÏ¢
+    //ɾ���鼮��Ϣ
     public static void deleteBook(String number, String classname) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-deleteBook");
+            System.out.println("�ɹ�����MySQL����-deleteBook");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-deleteBook");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-deleteBook");
 
-            String sql = "delete from "+classname+"Book where number = '"+number+"';";  //ÒªÖ´ÐеÄSQL
+            String sql = "delete from "+classname+"Book where number = '"+number+"';";  //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -388,62 +388,79 @@ public static void deleteBook(String number, String classname) {
             }
     }
 
-    //²éѯijÀàͼÊéÐÅÏ¢
+    //��ѯij��ͼ����Ϣ
     public static void search_classname(String classname) {
     	Information.bookarray.clear();
     	try{
     		
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-search_classname");
+            System.out.println("�ɹ�����MySQL����-search_classname");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-search_classname");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-search_classname");
 
-            String sql = "select * from "+classname+"Book;";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
-                while (rs.next()){
-                	Book book = new Book();
-                    book.number = rs.getString(1);
-                    book.classnumber = rs.getString(2);
-                    book.name = rs.getString(3);
-                    book.classname = rs.getString(4);
-                    book.price = rs.getString(5);
-                    book.state = rs.getString(6);
-                    book.total = rs.getString(7);
-                    book.current = rs.getString(8);
-                    book.dateon = rs.getString(9);
-                    book.dateoff = rs.getString(10);
-                    Information.bookarray.add(book);
+            String sql = "select * from "+classname+"Book;";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
+            ResultSetMetaData rsmd = rs.getMetaData();
+            int columnCount = rsmd.getColumnCount();
+            
+            //�����б����Ƿ���author�ֶ�
+            boolean hasAuthor = false;
+            for(int i=1; i<=columnCount; i++) {
+            	if("author".equalsIgnoreCase(rsmd.getColumnName(i))) {
+            		hasAuthor = true;
+            		break;
+            	}
+            }
+            
+            while (rs.next()){
+            	Book book = new Book();
+                book.number = rs.getString("number");
+                book.classnumber = rs.getString("classnumber");
+                book.name = rs.getString("name");
+                book.classname = rs.getString("classname");
+                if(hasAuthor) {
+                	book.author = rs.getString("author");
+                } else {
+                	book.author = "δ֪";
                 }
-                rs.close();
-                stmt.close();
-                conn.close();
-            }catch(Exception e)
-            {
-                e.printStackTrace();
+                book.price = rs.getString("price");
+                book.state = rs.getString("state");
+                book.total = rs.getString("total");
+                book.current = rs.getString("current");
+                book.dateon = rs.getString("dateon");
+                book.dateoff = rs.getString("dateoff");
+                Information.bookarray.add(book);
             }
+            rs.close();
+            stmt.close();
+            conn.close();
+        }catch(Exception e)
+        {
+            e.printStackTrace();
+        }
     }
     
-    //½èÊé¸ü¸ÄÐÅÏ¢
+    //���������Ϣ
     public static void borrowBook_Update(String classname,String number,String user,String dateoff) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-borrowBook_Customer");
+            System.out.println("�ɹ�����MySQL����-borrowBook_Customer");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-borrowBook_Customer");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-borrowBook_Customer");
 
-            String sql = "update "+classname+"Book set state = 'out' where number = '"+number+"';\n";    //ÒªÖ´ÐеÄSQL
+            String sql = "update "+classname+"Book set state = 'out' where number = '"+number+"';\n";    //Ҫִ�е�SQL
             PreparedStatement stmts_state = conn.prepareStatement(sql);
             stmts_state.executeUpdate();  
             stmts_state.close();
@@ -466,21 +483,21 @@ public static void borrowBook_Update(String classname,String number,String user,
             }
     }
     
-  //´´½¨Óû§Êý¾Ý¿â
+  //�����û����ݿ�
     public static void newCustomer(String user) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-newCustomer");
+            System.out.println("�ɹ�����MySQL����-newCustomer");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-newCustomer");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-newCustomer");
 
-            String sql = "CREATE TABLE "+user+"Customer (number VARCHAR(255) primary key,classname VARCHAR(255),name VARCHAR(255),dateoff VARCHAR(255));";    //ÒªÖ´ÐеÄSQL
+            String sql = "CREATE TABLE "+user+"Customer (number VARCHAR(255) primary key,classname VARCHAR(255),name VARCHAR(255),dateoff VARCHAR(255));";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -494,21 +511,21 @@ public static void newCustomer(String user) {
             }
     }
     
-    //½èÊé×¢Éäµ½Óû§ÐÅÏ¢
+    //����ע�䵽�û���Ϣ
     public static void borrowBook_Insert(String classname,String number,String user,String dateoff) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-borrowBook_Insert");
+            System.out.println("�ɹ�����MySQL����-borrowBook_Insert");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-borrowBook_Insert");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-borrowBook_Insert");
 
-            String sql = "insert into "+user+"Customer values('"+number+"','"+classname+"','"+search_bookname(classname, number)+"','"+dateoff+"');";    //ÒªÖ´ÐеÄSQL
+            String sql = "insert into "+user+"Customer values('"+number+"','"+classname+"','"+search_bookname(classname, number)+"','"+dateoff+"');";    //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -522,21 +539,21 @@ public static void borrowBook_Insert(String classname,String number,String user,
             }
     }
     
-    //»¹Êé¸üÐÂÊé¼®Êý¾Ý¿âÐÅÏ¢
+    //��������鼮���ݿ���Ϣ
     public static void returnBook_Update(String classname,String number,String user,String dateoff) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-returnBook_Update");
+            System.out.println("�ɹ�����MySQL����-returnBook_Update");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-returnBook_Update");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-returnBook_Update");
 
-            String sql = "update "+classname+"Book set state = 'in' where number = '"+number+"';\n";    //ÒªÖ´ÐеÄSQL
+            String sql = "update "+classname+"Book set state = 'in' where number = '"+number+"';\n";    //Ҫִ�е�SQL
             PreparedStatement stmts_state = conn.prepareStatement(sql);
             stmts_state.executeUpdate();  
             stmts_state.close();
@@ -558,21 +575,21 @@ public static void returnBook_Update(String classname,String number,String user,
                 e.printStackTrace();
             }
     }
-    //»¹Êé¸üÐÂÓû§µÄÊý¾Ý¿âÐÅÏ¢
+    //��������û������ݿ���Ϣ
     public static void returnBook_Delete(String number,String user) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-returnBook_Delete");
+            System.out.println("�ɹ�����MySQL����-returnBook_Delete");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-returnBook_Delete");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-returnBook_Delete");
 
-            String sql = "delete from "+user+"Customer where number = '"+number+"';";  //ÒªÖ´ÐеÄSQL
+            String sql = "delete from "+user+"Customer where number = '"+number+"';";  //Ҫִ�е�SQL
             
             PreparedStatement stmts = conn.prepareStatement(sql);
             stmts.executeUpdate();  
@@ -585,21 +602,21 @@ public static void returnBook_Delete(String number,String user) {
                 e.printStackTrace();
             }
     }
-    //Ðø½è¸üÐÂÁ½ÕßÊý¾Ý¿âÐÅÏ¢
+    //��������������ݿ���Ϣ
     public static void prolongBook_Update(String classname,String number,String dateoff,String user) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-prolongBook_Update");
+            System.out.println("�ɹ�����MySQL����-prolongBook_Update");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-prolongBook_Update");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-prolongBook_Update");
 
-            String sql = "update "+classname+"Book set dateoff = '"+dateoff+"' where number = '"+number+"';\n";    //ÒªÖ´ÐеÄSQL
+            String sql = "update "+classname+"Book set dateoff = '"+dateoff+"' where number = '"+number+"';\n";    //Ҫִ�е�SQL
             PreparedStatement stmts_state = conn.prepareStatement(sql);
             stmts_state.executeUpdate();  
             stmts_state.close();
@@ -617,24 +634,24 @@ public static void prolongBook_Update(String classname,String number,String date
             }
     }
     
-  //²éѯ¸öÈËͼÊéÐÅÏ¢
+  //��ѯ����ͼ����Ϣ
     public static void search_personal(String user) {
     	Information.bookarray.clear();
     	try{
     		
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-search_personal");
+            System.out.println("�ɹ�����MySQL����-search_personal");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-search_personal");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-search_personal");
 
-            String sql = "select * from "+user+"Customer;";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
+            String sql = "select * from "+user+"Customer;";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
                 while (rs.next()){
                 	Book book = new Book();
                     book.number = rs.getString(1);
@@ -651,22 +668,22 @@ public static void search_personal(String user) {
                 e.printStackTrace();
             }
     }
-	//ÊÇ·ñ´æÔÚ¸ÃTable±í
+	//�Ƿ���ڸ�Table��
     public static boolean isExist_Table(String table) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-isExist_Table");
+            System.out.println("�ɹ�����MySQL����-isExist_Table");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-isExist_Table");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-isExist_Table");
 
-            String sql = "show tables";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
+            String sql = "show tables";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
                 while (rs.next()){
                     if(table.equals(rs.getString(1))) {
                     	return true;
@@ -681,22 +698,22 @@ public static boolean isExist_Table(String table) {
             }
 		return false;
     }
-	//²éÕÒÊéÃû
+	//��������
     public static String search_bookname(String classname,String number) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-search_bookname");
+            System.out.println("�ɹ�����MySQL����-search_bookname");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-search_bookname");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-search_bookname");
 
-            String sql = "select * from "+classname+"book where number='"+number+"';";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
+            String sql = "select * from "+classname+"book where number='"+number+"';";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
             while (rs.next()){
                 return rs.getString(3);
             }
@@ -710,22 +727,22 @@ public static String search_bookname(String classname,String number) {
     	return "null";
     }
     
-	//²éÕÒÊ鼮״̬
+	//�����鼮״̬
     public static String search_bookstate(String classname,String number) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-search_bookstate");
+            System.out.println("�ɹ�����MySQL����-search_bookstate");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-search_bookstate");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-search_bookstate");
 
-            String sql = "select * from "+classname+"book where number='"+number+"';";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
+            String sql = "select * from "+classname+"book where number='"+number+"';";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
             while (rs.next()){
                 return rs.getString(6);
             }
@@ -739,22 +756,22 @@ public static String search_bookstate(String classname,String number) {
     	return "null";
     }
     
-	//²éÕÒÊé¼®»¹ÊéÈÕÆÚ
+	//�����鼮��������
     public static int search_bookdateoff(String classname,String number) {
     	try{
-            //µ÷ÓÃClass.forName()·½·¨¼ÓÔØÇý¶¯³ÌÐò
+            //����Class.forName()����������������
             Class.forName("com.mysql.jdbc.Driver");
-            System.out.println("³É¹¦¼ÓÔØMySQLÇý¶¯-search_bookdateoff");
+            System.out.println("�ɹ�����MySQL����-search_bookdateoff");
                 
-            String url=Information.JDBC_URL;    //JDBCµÄURL    
+            String url=Information.JDBC_URL;    //JDBC��URL    
             Connection conn;
 
             conn = DriverManager.getConnection(url,Information.username,Information.password);
-            Statement stmt = conn.createStatement(); //´´½¨Statement¶ÔÏó
-            System.out.println("³É¹¦Á¬½Óµ½Êý¾Ý¿â-search_bookdateoff");
+            Statement stmt = conn.createStatement(); //����Statement����
+            System.out.println("�ɹ����ӵ����ݿ�-search_bookdateoff");
 
-            String sql = "select * from "+classname+"book where number='"+number+"';";    //ÒªÖ´ÐеÄSQL
-            ResultSet rs = stmt.executeQuery(sql);//´´½¨Êý¾Ý¶ÔÏó
+            String sql = "select * from "+classname+"book where number='"+number+"';";    //Ҫִ�е�SQL
+            ResultSet rs = stmt.executeQuery(sql);//�������ݶ���
             while (rs.next()){
                 return Integer.parseInt(rs.getString(10));
             }
@@ -767,4 +784,212 @@ public static int search_bookdateoff(String classname,String number) {
             }
     	return 0;
     }
+    
+    //��ȡ�û��Ľ�鼮����
+    public static ArrayList<String> getUserBorrowedClasses(String user) {
+    	ArrayList<String> classes = new ArrayList<String>();
+    	try{
+            Class.forName("com.mysql.jdbc.Driver");
+            System.out.println("�ɹ�����MySQL����-getUserBorrowedClasses");
+                
+            String url=Information.JDBC_URL;   
+            Connection conn;
+
+            conn = DriverManager.getConnection(url,Information.username,Information.password);
+            Statement stmt = conn.createStatement(); 
+            System.out.println("�ɹ����ӵ����ݿ�-getUserBorrowedClasses");
+
+            String sql = "select distinct classname from "+user+"Customer;";
+            ResultSet rs = stmt.executeQuery(sql);
+            while (rs.next()){
+            	String className = rs.getString(1);
+            	if(!classes.contains(className)) {
+            		classes.add(className);
+            	}
+            }
+            rs.close();
+            stmt.close();
+            conn.close();
+            }catch(Exception e)
+            {
+                e.printStackTrace();
+            }
+    	return classes;
+    }
+    
+    //��ݶ�鼮����Ƽ�����ͼ��
+    public static ArrayList<Book> getRecommendBooks(String user) {
+    	ArrayList<Book> recommendBooks = new ArrayList<Book>();
+    	ArrayList<String> borrowedClasses = getUserBorrowedClasses(user);
+    	
+    	//����û�н�鼮��¼�����Ƽ�
+    	if(borrowedClasses.isEmpty()) {
+    		return recommendBooks;
+    	}
+    	
+    	//��ÿ�����e���в�ѯ�ɽ���ͼ��
+    	for(String className : borrowedClasses) {
+    		try{
+                Class.forName("com.mysql.jdbc.Driver");
+                System.out.println("�ɹ�����MySQL����-getRecommendBooks");
+                    
+                String url=Information.JDBC_URL;   
+                Connection conn;
+
+                conn = DriverManager.getConnection(url,Information.username,Information.password);
+                Statement stmt = conn.createStatement(); 
+                System.out.println("�ɹ����ӵ����ݿ�-getRecommendBooks");
+
+                //��ѯ���ø÷���еĿɽ���ͼ��
+                String sql = "select * from "+className+"Book where state='in';";
+                ResultSet rs = stmt.executeQuery(sql);
+                ResultSetMetaData rsmd = rs.getMetaData();
+                int columnCount = rsmd.getColumnCount();
+                
+                //�����б����Ƿ���author�ֶ�
+                boolean hasAuthor = false;
+                for(int i=1; i<=columnCount; i++) {
+                	if("author".equalsIgnoreCase(rsmd.getColumnName(i))) {
+                		hasAuthor = true;
+                		break;
+                	}
+                }
+                
+                while (rs.next()){
+                	Book book = new Book();
+                    book.number = rs.getString("number");
+                    book.classnumber = rs.getString("classnumber");
+                    book.name = rs.getString("name");
+                    book.classname = rs.getString("classname");
+                    if(hasAuthor) {
+                    	book.author = rs.getString("author");
+                    } else {
+                    	book.author = "δ֪";
+                    }
+                    book.price = rs.getString("price");
+                    book.state = rs.getString("state");
+                    book.total = rs.getString("total");
+                    book.current = rs.getString("current");
+                    book.dateon = rs.getString("dateon");
+                    book.dateoff = rs.getString("dateoff");
+                    recommendBooks.add(book);
+                }
+                rs.close();
+                stmt.close();
+                conn.close();
+                }catch(Exception e)
+                {
+                    e.printStackTrace();
+                }
+    	}
+    	
+    	return recommendBooks;
+    }
+    
+    //��ȡ���н�鼮����
+    public static ArrayList<String> getAllBookClasses() {
+    	ArrayList<String> classes = new ArrayList<String>();
+    	try{
+            Class.forName("com.mysql.jdbc.Driver");
+            System.out.println("�ɹ�����MySQL����-getAllBookClasses");
+                
+            String url=Information.JDBC_URL;   
+            Connection conn;
+
+            conn = DriverManager.getConnection(url,Information.username,Information.password);
+            Statement stmt = conn.createStatement(); 
+            System.out.println("�ɹ����ӵ����ݿ�-getAllBookClasses");
+
+            //��ѯ�������и�Book��β���
+            String sql = "show tables;";
+            ResultSet rs = stmt.executeQuery(sql);
+            while (rs.next()){
+            	String tableName = rs.getString(1);
+            	//ֻȡ��Book��β�����ⲻ��Customer���
+            	if(tableName.endsWith("Book") && !tableName.contains("Customer")) {
+            		//ȥ��Book׺
+            		String className = tableName.substring(0, tableName.length() - 4);
+            		if(!classes.contains(className)) {
+            			classes.add(className);
+            		}
+            	}
+            }
+            rs.close();
+            stmt.close();
+            conn.close();
+            }catch(Exception e)
+            {
+                e.printStackTrace();
+            }
+    	return classes;
+    }
+    
+    //�����г���Ƽ��ͼ��
+    public static ArrayList<Book> getRandomRecommendBooks() {
+    	ArrayList<Book> recommendBooks = new ArrayList<Book>();
+    	ArrayList<String> allClasses = getAllBookClasses();
+    	
+    	//�������
+    	if(allClasses.isEmpty()) {
+    		return recommendBooks;
+    	}
+    	
+    	//�Ӹ÷����в�ѯһЩ�ɽ���ͼ��
+    	for(String className : allClasses) {
+    		try{
+                Class.forName("com.mysql.jdbc.Driver");
+                System.out.println("�ɹ�����MySQL����-getRandomRecommendBooks");
+                    
+                String url=Information.JDBC_URL;   
+                Connection conn;
+
+                conn = DriverManager.getConnection(url,Information.username,Information.password);
+                Statement stmt = conn.createStatement(); 
+                System.out.println("�ɹ����ӵ����ݿ�-getRandomRecommendBooks");
+
+                //��ѯ���ø÷���еĿɽ���ͼ��
+                String sql = "select * from "+className+"Book where state='in' limit 3;";
+                ResultSet rs = stmt.executeQuery(sql);
+                ResultSetMetaData rsmd = rs.getMetaData();
+                int columnCount = rsmd.getColumnCount();
+                
+                //�����б����Ƿ���author�ֶ�
+                boolean hasAuthor = false;
+                for(int i=1; i<=columnCount; i++) {
+                	if("author".equalsIgnoreCase(rsmd.getColumnName(i))) {
+                		hasAuthor = true;
+                		break;
+                	}
+                }
+                
+                while (rs.next()){
+                	Book book = new Book();
+                    book.number = rs.getString("number");
+                    book.classnumber = rs.getString("classnumber");
+                    book.name = rs.getString("name");
+                    book.classname = rs.getString("classname");
+                    if(hasAuthor) {
+                    	book.author = rs.getString("author");
+                    } else {
+                    	book.author = "δ֪";
+                    }
+                    book.price = rs.getString("price");
+                    book.state = rs.getString("state");
+                    book.total = rs.getString("total");
+                    book.current = rs.getString("current");
+                    book.dateon = rs.getString("dateon");
+                    book.dateoff = rs.getString("dateoff");
+                    recommendBooks.add(book);
+                }
+                rs.close();
+                stmt.close();
+                conn.close();
+                }catch(Exception e)
+                {
+                    e.printStackTrace();
+                }
+    	}
+    	
+    	return recommendBooks;
+    }
 }
diff --git a/src/com/littleheap/Manager/InsertBook.java b/src/com/littleheap/Manager/InsertBook.java
index 750d6f8..bb4a13f 100644
--- a/src/com/littleheap/Manager/InsertBook.java
+++ b/src/com/littleheap/Manager/InsertBook.java
@@ -1,175 +1,190 @@
-package com.littleheap.Manager;
-
-import javax.swing.JPanel;
-import javax.swing.JLabel;
-import javax.swing.JOptionPane;
-
-import java.awt.Font;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
-
-import javax.swing.SwingConstants;
-
-import com.littleheap.MainInterface;
-import com.littleheap.DataBase.TableOperate;
-
-import javax.swing.JTextField;
-import javax.swing.JButton;
-import java.awt.Color;
-
-public class InsertBook extends JPanel implements ActionListener{
-	private JTextField tf_number;
-	private JLabel lb_number;
-	private JLabel lb_classnumber;
-	private JLabel lb_name;
-	private JLabel lb_classname;
-	private JLabel lb_price;
-	private JLabel lb_state;
-	private JLabel lb_total;
-	private JTextField tf_classnumber;
-	private JTextField tf_name;
-	private JTextField tf_classname;
-	private JTextField tf_price;
-	private JTextField tf_state;
-	private JTextField tf_total;
-	private JButton back;
-	private JButton btn_submit;
-
-	/**
-	 * Create the panel.
-	 */
-	public InsertBook() {
-		setBackground(Color.PINK);
-		setLayout(null);
-		
-		JLabel label = new JLabel("\u65B0\u4E66\u5F55\u5165");
-		label.setHorizontalAlignment(SwingConstants.CENTER);
-		label.setFont(new Font("ËÎÌå", Font.BOLD, 40));
-		label.setBounds(530, 0, 294, 105);
-		add(label);
-		
-		lb_number = new JLabel("\u7F16\u53F7\uFF1A");
-		lb_number.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_number.setBounds(293, 137, 194, 55);
-		add(lb_number);
-		
-		tf_number = new JTextField();
-		tf_number.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_number.setColumns(10);
-		tf_number.setBounds(486, 127, 526, 75);
-		add(tf_number);
-		
-		lb_classnumber = new JLabel("\u5206\u7C7B\u7F16\u53F7\uFF1A");
-		lb_classnumber.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_classnumber.setBounds(293, 233, 194, 55);
-		add(lb_classnumber);
-		
-		lb_name = new JLabel("\u4E66\u540D\uFF1A");
-		lb_name.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_name.setBounds(293, 329, 194, 55);
-		add(lb_name);
-		
-		lb_classname = new JLabel("\u5206\u7C7B\u540D\u79F0\uFF1A");
-		lb_classname.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_classname.setBounds(293, 435, 194, 55);
-		add(lb_classname);
-		
-		lb_price = new JLabel("\u4EF7\u683C\uFF1A");
-		lb_price.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_price.setBounds(293, 521, 194, 55);
-		add(lb_price);
-		
-		lb_state = new JLabel("\u5165\u85CF\u72B6\u6001\uFF1A");
-		lb_state.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_state.setBounds(293, 617, 194, 55);
-		add(lb_state);
-		
-		lb_total = new JLabel("\u6570\u91CF\uFF1A");
-		lb_total.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		lb_total.setBounds(293, 713, 194, 55);
-		add(lb_total);
-		
-		tf_classnumber = new JTextField();
-		tf_classnumber.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_classnumber.setColumns(10);
-		tf_classnumber.setBounds(486, 223, 526, 75);
-		add(tf_classnumber);
-		
-		tf_name = new JTextField();
-		tf_name.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_name.setColumns(10);
-		tf_name.setBounds(486, 319, 526, 75);
-		add(tf_name);
-		
-		tf_classname = new JTextField();
-		tf_classname.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_classname.setColumns(10);
-		tf_classname.setBounds(486, 415, 526, 75);
-		add(tf_classname);
-		
-		tf_price = new JTextField();
-		tf_price.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_price.setColumns(10);
-		tf_price.setBounds(486, 511, 526, 75);
-		add(tf_price);
-		
-		tf_state = new JTextField();
-		tf_state.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_state.setColumns(10);
-		tf_state.setBounds(486, 607, 526, 75);
-		add(tf_state);
-		
-		tf_total = new JTextField();
-		tf_total.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		tf_total.setColumns(10);
-		tf_total.setBounds(486, 703, 526, 75);
-		add(tf_total);
-		
-		btn_submit = new JButton("\u63D0\u4EA4");
-		btn_submit.setFont(new Font("ËÎÌå", Font.BOLD, 35));
-		btn_submit.setBounds(573, 833, 251, 80);
-		add(btn_submit);
-		btn_submit.addActionListener(this);
-		
-		back = new JButton("\u8FD4\u56DE");
-		back.setFont(new Font("ËÎÌå", Font.PLAIN, 26));
-		back.setBounds(0, 0, 115, 82);
-		add(back);
-		back.addActionListener(this);
-
-	}
-
-	@Override
-	public void actionPerformed(ActionEvent e) {
-		// TODO Auto-generated method stub
-		if(e.getSource() == back) {
-			//µã»÷·µ»Ø°´Å¥
-			MainInterface.InserttoManager();
-		}else if(e.getSource() == btn_submit) {
-			//µã»÷Ìá½»°´Å¥
-			//Åж¨Â¼ÈëÐÅÏ¢ÊÇ·ñ³åÍ»
-			String number = tf_number.getText();
-			String classnumber = tf_classnumber.getText();
-			String name = tf_name.getText();
-			String classname = tf_classname.getText();
-			String price = tf_price.getText();
-			String state = tf_state.getText();
-			String total = tf_total.getText();
-			
-			if(TableOperate.search_bookstate(classname, number).equals("null")) {
-				//²åÈëÊé¼®ÐÅÏ¢
-				TableOperate.insertBook(number, classnumber, name, classname, price, state, total);
-				tf_number.setText("");
-				tf_classnumber.setText("");
-				tf_name.setText("");
-				tf_classname.setText("");
-				tf_price.setText("");
-				tf_state.setText("");
-				tf_total.setText("");
-				JOptionPane.showMessageDialog(null, "¹§Ï²", "Ê鼮¼Èë³É¹¦", JOptionPane.OK_CANCEL_OPTION);
-			}else {
-				JOptionPane.showMessageDialog(null, "Êé¼®ÐÅÏ¢³åÍ»", "Ê鼮¼Èëʧ°Ü", JOptionPane.ERROR_MESSAGE);
-			}
-		}
-	}
-}
+package com.littleheap.Manager;
+
+import javax.swing.JPanel;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+
+import java.awt.Font;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.SwingConstants;
+
+import com.littleheap.MainInterface;
+import com.littleheap.DataBase.TableOperate;
+
+import javax.swing.JTextField;
+import javax.swing.JButton;
+import java.awt.Color;
+
+public class InsertBook extends JPanel implements ActionListener{
+	private JTextField tf_number;
+	private JLabel lb_number;
+	private JLabel lb_classnumber;
+	private JLabel lb_name;
+	private JLabel lb_classname;
+	private JLabel lb_author;
+	private JLabel lb_price;
+	private JLabel lb_state;
+	private JLabel lb_total;
+	private JTextField tf_classnumber;
+	private JTextField tf_name;
+	private JTextField tf_classname;
+	private JTextField tf_author;
+	private JTextField tf_price;
+	private JTextField tf_state;
+	private JTextField tf_total;
+	private JButton back;
+	private JButton btn_submit;
+
+	/**
+	 * Create the panel.
+	 */
+	public InsertBook() {
+		setBackground(Color.PINK);
+		setLayout(null);
+		
+		JLabel label = new JLabel("\u65B0\u4E66\u5F55\u5165");
+		label.setHorizontalAlignment(SwingConstants.CENTER);
+		label.setFont(new Font("����", Font.BOLD, 40));
+		label.setBounds(530, 0, 294, 105);
+		add(label);
+		
+		lb_number = new JLabel("\u7F16\u53F7\uFF1A");
+		lb_number.setFont(new Font("����", Font.BOLD, 35));
+		lb_number.setBounds(293, 120, 194, 55);
+		add(lb_number);
+		
+		tf_number = new JTextField();
+		tf_number.setFont(new Font("����", Font.BOLD, 35));
+		tf_number.setColumns(10);
+		tf_number.setBounds(486, 110, 526, 75);
+		add(tf_number);
+		
+		lb_classnumber = new JLabel("\u5206\u7C7B\u7F16\u53F7\uFF1A");
+		lb_classnumber.setFont(new Font("����", Font.BOLD, 35));
+		lb_classnumber.setBounds(293, 200, 194, 55);
+		add(lb_classnumber);
+		
+		lb_name = new JLabel("\u4E66\u540D\uFF1A");
+		lb_name.setFont(new Font("����", Font.BOLD, 35));
+		lb_name.setBounds(293, 280, 194, 55);
+		add(lb_name);
+		
+		lb_classname = new JLabel("\u5206\u7C7B\u540D\u79F0\uFF1A");
+		lb_classname.setFont(new Font("����", Font.BOLD, 35));
+		lb_classname.setBounds(293, 360, 194, 55);
+		add(lb_classname);
+		
+		lb_author = new JLabel("\u4F5C\u8005\uFF1A");
+		lb_author.setFont(new Font("����", Font.BOLD, 35));
+		lb_author.setBounds(293, 440, 194, 55);
+		add(lb_author);
+		
+		lb_price = new JLabel("\u4EF7\u683C\uFF1A");
+		lb_price.setFont(new Font("����", Font.BOLD, 35));
+		lb_price.setBounds(293, 520, 194, 55);
+		add(lb_price);
+		
+		lb_state = new JLabel("\u5165\u85CF\u72B6\u6001\uFF1A");
+		lb_state.setFont(new Font("����", Font.BOLD, 35));
+		lb_state.setBounds(293, 600, 194, 55);
+		add(lb_state);
+		
+		lb_total = new JLabel("\u6570\u91CF\uFF1A");
+		lb_total.setFont(new Font("����", Font.BOLD, 35));
+		lb_total.setBounds(293, 680, 194, 55);
+		add(lb_total);
+		
+		tf_classnumber = new JTextField();
+		tf_classnumber.setFont(new Font("����", Font.BOLD, 35));
+		tf_classnumber.setColumns(10);
+		tf_classnumber.setBounds(486, 190, 526, 75);
+		add(tf_classnumber);
+		
+		tf_name = new JTextField();
+		tf_name.setFont(new Font("����", Font.BOLD, 35));
+		tf_name.setColumns(10);
+		tf_name.setBounds(486, 270, 526, 75);
+		add(tf_name);
+		
+		tf_classname = new JTextField();
+		tf_classname.setFont(new Font("����", Font.BOLD, 35));
+		tf_classname.setColumns(10);
+		tf_classname.setBounds(486, 350, 526, 75);
+		add(tf_classname);
+		
+		tf_author = new JTextField();
+		tf_author.setFont(new Font("����", Font.BOLD, 35));
+		tf_author.setColumns(10);
+		tf_author.setBounds(486, 430, 526, 75);
+		add(tf_author);
+		
+		tf_price = new JTextField();
+		tf_price.setFont(new Font("����", Font.BOLD, 35));
+		tf_price.setColumns(10);
+		tf_price.setBounds(486, 510, 526, 75);
+		add(tf_price);
+		
+		tf_state = new JTextField();
+		tf_state.setFont(new Font("����", Font.BOLD, 35));
+		tf_state.setColumns(10);
+		tf_state.setBounds(486, 590, 526, 75);
+		add(tf_state);
+		
+		tf_total = new JTextField();
+		tf_total.setFont(new Font("����", Font.BOLD, 35));
+		tf_total.setColumns(10);
+		tf_total.setBounds(486, 670, 526, 75);
+		add(tf_total);
+		
+		btn_submit = new JButton("\u63D0\u4EA4");
+		btn_submit.setFont(new Font("����", Font.BOLD, 35));
+		btn_submit.setBounds(573, 780, 251, 80);
+		add(btn_submit);
+		btn_submit.addActionListener(this);
+		
+		back = new JButton("\u8FD4\u56DE");
+		back.setFont(new Font("����", Font.PLAIN, 26));
+		back.setBounds(0, 0, 115, 82);
+		add(back);
+		back.addActionListener(this);
+
+	}
+
+	@Override
+	public void actionPerformed(ActionEvent e) {
+		// TODO Auto-generated method stub
+		if(e.getSource() == back) {
+			//������ذ�ť
+			MainInterface.InserttoManager();
+		}else if(e.getSource() == btn_submit) {
+			//�������ť
+			//�ж�¼����Ϣ�Ƿ��ͻ
+			String number = tf_number.getText();
+			String classnumber = tf_classnumber.getText();
+			String name = tf_name.getText();
+			String classname = tf_classname.getText();
+			String author = tf_author.getText();
+			String price = tf_price.getText();
+			String state = tf_state.getText();
+			String total = tf_total.getText();
+			
+			if(TableOperate.search_bookstate(classname, number).equals("null")) {
+				//�����鼮��Ϣ
+				TableOperate.insertBook(number, classnumber, name, classname, author, price, state, total);
+				tf_number.setText("");
+				tf_classnumber.setText("");
+				tf_name.setText("");
+				tf_classname.setText("");
+				tf_author.setText("");
+				tf_price.setText("");
+				tf_state.setText("");
+				tf_total.setText("");
+				JOptionPane.showMessageDialog(null, "��ϲ", "�鼮¼��ɹ�", JOptionPane.OK_CANCEL_OPTION);
+			}else {
+				JOptionPane.showMessageDialog(null, "�鼮��Ϣ��ͻ", "�鼮¼��ʧ��", JOptionPane.ERROR_MESSAGE);
+			}
+		}
+	}
+}
diff --git a/src/com/littleheap/User/BorrowBook_Information.java b/src/com/littleheap/User/BorrowBook_Information.java
index a8ef8c7..fce8901 100644
--- a/src/com/littleheap/User/BorrowBook_Information.java
+++ b/src/com/littleheap/User/BorrowBook_Information.java
@@ -1,7 +1,9 @@
 package com.littleheap.User;
 
 import javax.swing.JPanel;
+import javax.swing.JScrollPane;
 
+import com.littleheap.Book;
 import com.littleheap.MainInterface;
 import com.littleheap.DataBase.TableOperate;
 import com.littleheap.Static.Information;
@@ -12,20 +14,27 @@
 import java.awt.TextArea;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.ArrayList;
+
 import javax.swing.JTextArea;
 import javax.swing.JLabel;
 import javax.swing.JOptionPane;
 import javax.swing.JTextField;
+import javax.swing.border.TitledBorder;
 
 public class BorrowBook_Information extends JPanel implements ActionListener {
 	private JButton back;
 	private static JTextArea textArea;
+	private static JTextArea recommendTextArea;
 	private static String info;
+	private static String recommendInfo;
 	private JTextField tf_number;
 	private JLabel lb_number;
 	private JButton btn_borrow;
 	private JLabel lb_dateoff;
 	private JTextField tf_dateoff;
+	private JLabel lb_recommend;
+	private JPanel recommendPanel;
 
 	/**
 	 * Create the panel.
@@ -35,52 +44,88 @@ public BorrowBook_Information() {
 		setLayout(null);
 		
 		back = new JButton("\u8FD4\u56DE");
-		back.setFont(new Font("ËÎÌå", Font.PLAIN, 26));
+		back.setFont(new Font("����", Font.PLAIN, 26));
 		back.setBounds(0, 0, 115, 82);
 		add(back);
 		back.addActionListener(this);
 		
+		//�����Լ���б���
 		textArea = new JTextArea();
-		textArea.setFont(new Font("Monospaced", Font.PLAIN, 20));
-		textArea.setBounds(152, 142, 1111, 782);
-		add(textArea);
-		
+		textArea.setFont(new Font("Monospaced", Font.PLAIN, 18));
+		textArea.setBounds(152, 142, 800, 782);
 		textArea.setEditable(false);
 		
+		//�������ö�
+		JScrollPane scrollPane = new JScrollPane(textArea);
+		scrollPane.setBounds(152, 142, 800, 782);
+		scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
+		add(scrollPane);
+		
 		lb_number = new JLabel("\u56FE\u4E66\u7F16\u53F7\uFF1A");
-		lb_number.setFont(new Font("ËÎÌå", Font.BOLD, 35));
+		lb_number.setFont(new Font("����", Font.BOLD, 35));
 		lb_number.setBounds(152, 39, 185, 55);
 		add(lb_number);
 		
 		tf_number = new JTextField();
-		tf_number.setFont(new Font("ËÎÌå", Font.BOLD, 35));
+		tf_number.setFont(new Font("����", Font.BOLD, 35));
 		tf_number.setColumns(10);
 		tf_number.setBounds(317, 29, 226, 75);
 		add(tf_number);
 		
 		btn_borrow = new JButton("\u501F\u4E66");
-		btn_borrow.setFont(new Font("ËÎÌå", Font.BOLD, 35));
+		btn_borrow.setFont(new Font("����", Font.BOLD, 35));
 		btn_borrow.setBounds(926, 26, 251, 80);
 		add(btn_borrow);
 		btn_borrow.addActionListener(this);
 		
 		lb_dateoff = new JLabel("\u671F\u9650\uFF1A");
-		lb_dateoff.setFont(new Font("ËÎÌå", Font.BOLD, 35));
+		lb_dateoff.setFont(new Font("����", Font.BOLD, 35));
 		lb_dateoff.setBounds(575, 39, 185, 55);
 		add(lb_dateoff);
 		
 		tf_dateoff = new JTextField();
-		tf_dateoff.setFont(new Font("ËÎÌå", Font.BOLD, 35));
+		tf_dateoff.setFont(new Font("����", Font.BOLD, 35));
 		tf_dateoff.setColumns(10);
 		tf_dateoff.setBounds(679, 29, 226, 75);
 		add(tf_dateoff);
 		
-		info = "ͼÊé±àºÅ     ·ÖÀà±àºÅ     ͼÊéÃû³Æ                ·ÖÀàÃû³Æ      ¼Û¸ñ     ״̬     »ñÈ¡ÈË     ÖÕÖ¹ÈÕÆÚ\n";
+		//�����Ƽ�������
+		lb_recommend = new JLabel("\u4E66\u7C4D\u63A8\u8350");
+		lb_recommend.setFont(new Font("����", Font.BOLD, 28));
+		lb_recommend.setForeground(new Color(139, 69, 19));
+		lb_recommend.setBounds(970, 130, 180, 40);
+		add(lb_recommend);
+		
+		//�����Ƽ������ӱ߿�
+		recommendPanel = new JPanel();
+		recommendPanel.setLayout(null);
+		recommendPanel.setBackground(new Color(255, 248, 220));
+		recommendPanel.setBorder(new TitledBorder(null, "�����Ƽ�", TitledBorder.LEADING, TitledBorder.TOP, new Font("����", Font.BOLD, 20), new Color(139, 69, 19)));
+		recommendPanel.setBounds(970, 170, 300, 750);
+		add(recommendPanel);
+		
+		//�����Ƽ�������б���
+		recommendTextArea = new JTextArea();
+		recommendTextArea.setFont(new Font("Monospaced", Font.PLAIN, 16));
+		recommendTextArea.setEditable(false);
+		recommendTextArea.setBackground(new Color(255, 248, 220));
+		recommendTextArea.setLineWrap(true);
+		recommendTextArea.setWrapStyleWord(true);
+		
+		//�����Ƽ�������ö�
+		JScrollPane recommendScrollPane = new JScrollPane(recommendTextArea);
+		recommendScrollPane.setBounds(10, 25, 280, 715);
+		recommendScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
+		recommendScrollPane.setBorder(null);
+		recommendPanel.add(recommendScrollPane);
+		
+		info = "ͼ����     ������     ͼ������                ��������      �۸�     ״̬     ��ȡ��     ��ֹ����\n";
+		recommendInfo = "";
 		
 	}
 	
 	public static void setTextArea() {
-		info = "ͼÊé±àºÅ     ·ÖÀà±àºÅ     ͼÊéÃû³Æ                ·ÖÀàÃû³Æ      ¼Û¸ñ     ״̬     »ñÈ¡ÈË     ÖÕÖ¹ÈÕÆÚ\n";
+		info = "ͼ����     ������     ͼ������                ��������      �۸�     ״̬     ��ȡ��     ��ֹ����\n";
 		
 		for(int i=0;i<Information.bookarray.size();i++) {
 			info = info+"  "+Information.bookarray.get(i).number+"          ";
@@ -103,32 +148,80 @@ public static void setTextArea() {
             
 		}
 		textArea.setText(info);
+		
+		//�����Ƽ�����
+		setRecommendArea();
+	}
+	
+	//�����Ƽ�������
+	public static void setRecommendArea() {
+		ArrayList<Book> recommendBooks = TableOperate.getRecommendBooks(Information.user);
+		
+		//����û�н�鼮��¼�����ṩ�����Ƽ�
+		if(recommendBooks.isEmpty()) {
+			recommendBooks = TableOperate.getRandomRecommendBooks();
+		}
+		
+		recommendInfo = "";
+		
+		if(recommendBooks.isEmpty()) {
+			recommendInfo = "��ʱû�����Ƽ�����\n\n�����������ֲ���ͼ�飡";
+		} else {
+			recommendInfo = "���������Ľ�鼮��¼��\nΪ���������Ƽ����룺\n\n";
+			recommendInfo += "================================\n\n";
+			
+			for(int i=0;i<recommendBooks.size();i++) {
+				Book book = recommendBooks.get(i);
+				recommendInfo += "�"+(i+1)+"】《"+book.name+"》\n";
+				recommendInfo += "    ����ƣ�"+book.classname+"\n";
+				//������ʾ������Ϣ���Ϊ�ջ�Ϊnull����ʾ"δ֪"
+				String author = book.author;
+				if(author == null || author.equals("") || author.equals("null")) {
+					author = "δ֪";
+				}
+				recommendInfo += "    ���룺"+author+"\n";
+				recommendInfo += "    ״̣�"+(book.state.equals("in") ? "�ɽ���" : "�ѽ���")+"\n";
+				recommendInfo += "    �༶��"+book.number+"\n\n";
+				
+				if(i >= 9) { //ֻ��ʾǰ10����Ƽ�
+					recommendInfo += "... ���м�Ƽ� ...\n";
+					break;
+				}
+			}
+			
+			recommendInfo += "\n================================\n";
+			recommendInfo += "��ʾ���������Ƽ����ɽ���";
+		}
+		
+		recommendTextArea.setText(recommendInfo);
 	}
 	
 	@Override
 	public void actionPerformed(ActionEvent e) {
 		// TODO Auto-generated method stub
 		if(e.getSource() == back) {
-			//µã»÷·µ»Ø°´Å¥
+			//������ذ�ť
 			MainInterface.BorrowInfotoBorrow();
 		}if(e.getSource() == btn_borrow) {
-			//µã»÷½èÊé°´Å¥
-			//ÏÈÅж¨ÊÇ·ñÓдËÊé
+			//������鰴ť
+			//���ж��Ƿ��д���
 			if(TableOperate.search_bookname(Information.search_classname, tf_number.getText()).equals("null")) {
-				JOptionPane.showMessageDialog(null, "ÊäÈë½èÊéÐÅÏ¢ÓÐÎó", "½èÊéʧ°Ü", JOptionPane.ERROR_MESSAGE);
+				JOptionPane.showMessageDialog(null, "���������Ϣ����", "����ʧ��", JOptionPane.ERROR_MESSAGE);
 				tf_number.setText("");
 				tf_dateoff.setText("");
 			}else {
-				//Åж¨´ËÊéÊÇ·ñÒѱ»½è³ö
+				//�ж������Ƿ��ѱ����
 				if(TableOperate.search_bookstate(Information.search_classname,  tf_number.getText()).equals("in")) {
 					TableOperate.borrowBook_Update(Information.search_classname, tf_number.getText(), Information.user, tf_dateoff.getText().toString());
 					TableOperate.borrowBook_Insert(Information.search_classname, tf_number.getText(), Information.user, tf_dateoff.getText().toString());
 					tf_number.setText("");
 					tf_dateoff.setText("");
+					//�������º����µ�Ƽ�����
+					setRecommendArea();
 					MainInterface.BorrowInfotoBorrow();
 					MainInterface.BorrowtoUser();
 				}else {
-					JOptionPane.showMessageDialog(null, "¸ÃÊéÒѽè³öÖÁ£º"+TableOperate.search_bookdateoff(Information.search_classname, tf_number.getText()), "½èÊéʧ°Ü", JOptionPane.ERROR_MESSAGE);
+					JOptionPane.showMessageDialog(null, "�����ѽ������"+TableOperate.search_bookdateoff(Information.search_classname, tf_number.getText()), "����ʧ��", JOptionPane.ERROR_MESSAGE);
 					tf_number.setText("");
 					tf_dateoff.setText("");
 				}