JSP and Java Beans with Database Problem

Question

hellow, this is my first posting and i hope to help me as fast as you can...
my problem is simplly i cant get any data from the database (whatever the database it is, i test it with MS Access and MySQL server) when i use a bean, But if i put my connection statement in the JSP file thair is no problem... ???? !!!!
for example i have a class "Authentication" that have a method to test if the username and password is correct or not and return 1 if true, 0 if false, -1 if thair are some problem in connecting DB.
now if i create a normal java application that uses this method, it's work and no problems, BUT if i used a JSP page to use this method it's return allways -1

Answer 1

T1 class:
package VX;
import java.sql.*;
import java.util.*;
import javax.swing.*;
public class T1
//public MBJDBConnection(String driver,String url)
public T1()
JDBC_DRIVER = "com.mysql.jdbc.Driver";//driver;
DATABASE_URL = "jdbc:mysql://localhost:3306/rawafed?user=root;password=0000";//url;
//=======DB CONNECTION===========================================
private static String JDBC_DRIVER;
private static String DATABASE_URL;
protected Connection connection;
protected Statement statement;
//===========End DBC==============================================
public int update(String sqlUpdate)
     int i=0;
          //connectDB();
          try{
               i=statement.executeUpdate(""+sqlUpdate);
               catch(Exception e)
                    System.out.println("Error Inserting Statement Or Connection Not Opened");
          //disconnectDB();
     return i;
public ResultSet select(String sqlQuery)
          //connectDB();
          ResultSet rs;
          try
          {//open try
          rs=statement.executeQuery(""+sqlQuery);
               return rs;
          }//end try
          catch(Exception e2)
               //System.out.println("Error Selecting Statement Or Connection Not Opened");
          }//end catch
          //add to array list
     //return resultList;
     return null;
//------Methods-------
public void connectDB()
//===========================Connection===================
try
Class.forName(JDBC_DRIVER);
catch(Exception e)
System.out.println("Error : FOR NAME");
try
connection = DriverManager.getConnection(DATABASE_URL, "root", "0000");
catch(Exception e)
System.out.println("Error : DB URL");
try
statement = connection.createStatement();
catch(Exception e)
System.out.println("Error : CREATE STATEMENT ERROR");
public void disconnectDB()
try
statement.close();
connection.close();
catch(Exception e2)
System.out.println("Error : CAN'T CLOSE DB");
T2 Class
package VX;
// class Person.
//Required Class : EDC.EDCDB
import java.sql.*;
public class T2
     public T2()
          //initialization
     //........................ Attributes .........................
     private String user;
     private String password;
     private T1 db=new T1();
     private ResultSet rs;
     //......................... Methods .........................
     public String getAdmin(String u,String p)// 0: Failure, 1:Success and he is Administrator, 2: success and he is a regular employee 3: SUCCESS AND HE IS agent
          try
          user=u;
          password=p;
          rs=db.select("SELECT emp_id,password FROM Employee WHERE emp_id="+user+" AND password="+password+" AND Rank_ID=1");
          if(rs.next())
               return ""+1;
          else
               rs=db.select("SELECT emp_id,password FROM Employee WHERE emp_id="+user+" AND password="+password+" AND Rank_ID=2");
               if(rs.next())
                    return ""+2;
               else
                    rs=db.select("SELECT emp_id,password FROM Employee WHERE emp_id="+user+" AND password="+password+" AND Rank_ID=3");
                    if(rs.next())
                         return ""+3;
                    else return ""+0;
          catch(Exception e){System.out.println("Error \n"+e.getMessage());return ""+e.getMessage()+"\n"+(-1);}
     public int getCard(String u,String p)// 0: Failure, 1:Success and he is Administrator, 2: success
          user=u;
          password=p;
          try
          db.connectDB();
          rs=db.select("SELECT Card_ID,password FROM Card WHERE Card_ID='"+user+"' AND password='"+password+"'");
          if(rs.next())
               return 1;
          return 0;
          catch(Exception w)
               return -1;
          finally
               //System.out.println("Done");
               db.disconnectDB();
     public int getAny()
          return 1;
}//end class
This is a tested class and it's work OK
import VX.T2;
public class T3
     public static void main(String [] args)
          System.out.println("System Started...");
          try
               T2 t2=new T2();
               System.out.println(t2.getCard("1","a"));
          catch(Exception e)
               System.out.println("Opsssss ...");
Now this is the JSP Code that OK and Run without any problems
<%@ page contentType="text/html; charset=windows-1256" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1256" />
<title>test</title>
</head>
<body>
<%
//Mazin B. Jabarin 20210464
//Testing JSP - MySQL Server Driver
String connectionURL = "jdbc:mysql://localhost:3306/EDCDB?user=root;password=0000";
Connection connection = null;
Statement statement = null;
ResultSet rs = null;
%>
<%
try{
Class.forName("com.mysql.jdbc.Driver");
connection = DriverManager.getConnection(connectionURL, "root", "0000");
statement = connection.createStatement();
rs = statement.executeQuery("SELECT * FROM a");
while (rs.next()) {
out.println(rs.getString("id")+"<br>");
rs.close();
catch(Exception e)
out.print("Error : "+e.getMessage());
%>
</body>
</html>
Now this JSP File always returns (-1) ???? !!!!!!!
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" import="VX.T2" import="java.util.*" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body>
<%
try
T2 t2=new T2();
out.println("Result Still : "+t2.getCard("1","a"));
catch(Exception w)
out.println("<BR> Error In Execution ??? "+w.getMessage());
%>
</body>
</html>
++++++++++++++++++++++++++++
any one can help me please :(
i use tomcat as web-application
and i install jdk 1.5
also JBulder 7
(now i supposed that the JBulder make some conflict, so i uninstalled it but still Not Working) ...
before one year i was working just like this way and it was working
but now i dont know what is the problem
i am really need help.