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¸Õ¿ªÊ¼Åª ,Ŀǰ·ÖÒ³ÊÇÔÚǰ̨jspÖÐʵÏֵĠ  ÓëbeanÏà±È ÕâÑù±È½ÏÈÝÒ×һЩ ÏȰѴúÂëÌù³öÀ´   ÕýÔÚÑо¿ÔõôÑùÓÃbeanʵÏÖ·ÖÒ³  µÈŪºÃÁË ÔÙÌù´úÂë ÏÂÃæËµÏ·ÖÒ³ÀíÂÛ select * from message order by time desc limit begin,size begin Êý¾Ý¼Ç¼´ÓµÚ¼¸Ìõ¿ªÊ¼    begin=(µ±Ç°Ò³Êý-1)*size size ÿҳµÄ¼Ç¼Êý ÏÂÃæÊÇÁ¬½ÓÊý¾Ý¿âµÄjavabean; 1: package bean;
2: import java.sql.*;
3: 
4: public class MyDb{
5: private Statement stmt;
6: private Connection conn=null;
7: private ResultSet rs=null;
8:
9: public void connection(String db_name,String user,String pwd) throws Exception{
10: Class.forName("com.mysql.jdbc.Driver");
11: String url="jdbc:mysql://localhost:3306/" + db_name;
12: conn=DriverManager.getConnection(url,user,pwd);
13: stmt=conn.createStatement();
14: }
15:
16: public ResultSet query(String sql) throws Exception{
17: rs=stmt.executeQuery(sql);
18: return rs;
19: }
20:
21: public ResultSet query(String sql,int begin,int size) throws Exception{
22: String s=" limit " + begin + "," +size;
23: sql=sql + s;
24: rs=stmt.executeQuery(sql);
25: return rs;
26: }
27: 
28:
29: public int update(String sql) throws Exception{
30: int n=0;
31: n=stmt.executeUpdate(sql);
32: return n;
33: }
34:
35: public boolean delete(String sql) throws Exception{
36: boolean flag=false;
37: flag=stmt.execute(sql);
38: return flag;
39: }
40: }
 
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1: <jsp:useBean id="db" class=


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