Hi guys,
just installed oracle database express edition for my home computer. i have the database running and i am connected though SQL developer. i couldn't connect via the basic connection as i kept getting an error (listener refused connection... TNS: listener does not know of SID given connect descriptor) so i connected through a TNS connection with network alias: ORCL
my problem is now i don't know how to connect my java code to the database so i can run CreateContacts class to make the tables ... currently when i run the CreateContacts class and check in SQL developer if the tables were made, they are not in the database so i assume my java connection(// Home Oracle XE) is incorrect in the DBConnection class. can anyone have a look please and help me get my java connected to my database so i can run the CreateContacts class?
DBConnection class
package database;
import java.sql.*;
import oracle.jdbc.pool.OracleDataSource;
public class DBConnection {
private Connection conn = null;
public Connection openDB()
{
try
{
OracleDataSource ods = new OracleDataSource();
// College
// ods.setURL("jdbc:oracle:thin:@//10.10.2.7:1521/global1");
// ods.setUser("x00075734");
// ods.setPassword("db27Oct90");
// Home Oracle XE
ods.setURL("jdbc:oracle:thin:HR/SYSTEM@localhost:1521:XE"); // not sure if this line is
//is correct
ods.setUser("SYSTEM"); // username i use to log into oracle database
ods.setPassword("db27Oct90"); //password i use to log into oracle database
conn = ods.getConnection();
System.out.println("connected.");
}
catch (Exception e)
{
System.out.print("Unable to load driver " + e);
System.exit(1);
}
return conn;
}
public void closeDB()
{
try
{
conn.close();
System.out.print("Connection closed");
}
catch (SQLException e)
{
System.out.print("Could not close connection ");
e.printStackTrace();
}
}
}
CreateContacts class
package database;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
public class CreateContacts
{
private Connection conn = null;
private PreparedStatement stmt = null;
private DBConnection db;
public CreateContacts()
{
db = new DBConnection();
conn = db.openDB();
}
public void CreateContactsTable()
{
try
{
// Dropping a Table
String drop = "DROP TABLE Contacts";
stmt = conn.prepareStatement(drop);
stmt.executeUpdate();
// Create a Table
String create = "CREATE TABLE Contacts " +
"(id NUMBER PRIMARY KEY, name VARCHAR(40), address VARCHAR(30), pnumber VARCHAR(30), email VARCHAR(20))";
stmt = conn.prepareStatement(create);
stmt.executeUpdate(create);
// Insert data into table
String insertString = "INSERT INTO Contacts(id,name,address,pnumber,email) values(?,?,?,?,?)";
stmt = conn.prepareStatement(insertString);
stmt.setInt(1, 1);
stmt.setString(2, "Peter");
stmt.setString(3, "23 Lime Lane");
stmt.setString(4, "018776543");
stmt.setString(5, "p.cassisy@b.com");
stmt.executeUpdate();
stmt.setInt(1, 2);
stmt.setString(2, "Donal");
stmt.setString(3, "2 Shelbourne rd");
stmt.setString(4, "012445678");
stmt.setString(5, "d.oreilly@b.com");
stmt.executeUpdate();
stmt.setInt(1, 3);
stmt.setString(2, "Mary");
stmt.setString(3, "4 Richmond rd");
stmt.setString(4, "018765456");
stmt.setString(5, "m.lawlor@b.com");
stmt.executeUpdate();
stmt.setInt(1, 4);
stmt.setString(2, "Glen");
stmt.setString(3, "4 Richmond lane");
stmt.setString(4, "017854563");
stmt.setString(5, "g.whelan@b.com");
stmt.executeUpdate();
conn.commit();
stmt.close();
db.closeDB();
}
catch (SQLException e)
{
System.out.print("SQL Exception " + e);
System.exit(1);
}
}
public static void main(String args[])
{
CreateContacts ct = new CreateContacts();
ct.CreateContactsTable();
}
}
thanks in advance
