How to use two different database Drivers in one application ????

Question

I want to select datas in a result set of a query on a ms access database table and insert these into a mysql table of a mysql database in one application.
Now my problem is that only on database driver is acceptet in the same application even it`s instanciatet in a completely different class !!!
Here's the structure of my program:
class one:
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
database += filename.trim() + ";DriverID=22;READONLY=false}";
java.sql.Driver driver0=new sun.jdbc.odbc.JdbcOdbcDriver();
DriverManager.registerDriver(driver0);
DriverManager.getDriver(database);
con2=DriverManager.getConnection(database,"","");
DatabaseMetaData dmd2;
dmd2=con2.getMetaData();
stmt2=con2.createStatement();
rs2=("SELECT (.........
until here all values can be selected correctly from ms access
class2.get_gas_id(fla_gas);
Now I want to insert these values into mysql.
By despair i created a second class with another jdbc-method:
class2:
public class gas_select{
public static int fla_gas_id;
public static void get_gas_id(String fla_gas)
java.sql.Statement stmt3;
java.sql.Connection con3;
java.sql.ResultSet rs3;
FileWriter fout1;
try
java.sql.Driver driver1=new org.gjt.mm.mysql.Driver();
DriverManager.registerDriver(driver1);
DriverManager.getDriver(config.db_rge_stoffe); ==>
config.rge_stoffe="jdbc:mysql://192.168.10.101:3306/rge_stoffe?user=<user>";
con3=DriverManager.getConnection(config.db_rge_stoffe);
java.sql.DatabaseMetaData dmd3;
dmd3=con3.getMetaData();
stmt3=con3.createStatement();
rs3=stmt3.executeQuery("SELECT (Nr) from tblgaseliste where Gasart like "+"\'"+fla_gas+"\'");
while(rs3.next())
fla_gas_id=rs3.getInt("Nr");
fout1.write(fla_gas_id);
stmt3.close();
con3.close();
fout1.close();
There's no result and no error message. Idon't know what to do !
Has anyone an idea ???
Edited by: goberger on Mar 27, 2008 3:35 PM

Answer 1

Hi!
If I understand your problem correctly, you can create connections to as many databases as you want in one class. In one of my programs I have connection to 3 separate databases, but here is an example:
Connection mysql_con = DriverManager.getConnection("jdbc:mysql://localhost:3306/dbmysql", "root", "12345");
Connection pg_con    = DriverManager.getConnection("jdbc:postgresql://127.0.0.1:5433/dbpgsql", "postgres", "12345");Then from mysql_con and pg_con create PreparedStatement or Statement then load selections into ResultSet and then use getString() to get a basic String type result that you want and so update table from each database.
HTH
Victor.
BTW Here I use port 5433 for PostgreSQL connection because I SSH tunnel it from 5432 to 5433
Edited by: vic_sk on Mar 27, 2008 4:23 PM