Thread: Insert into database from flat file

Hi, I am trying to insert the contents of a flat file into table. To connect to database i am using JDBC driver. I the problem i am facing is the contents of flat file is being inserted into table only for the first time when i run the program, again when i try to insert into it( even though table is empty) i am getting an error message.
Can anyone help me in this regard.
Thanks in advance.

program to insert into table:

 
public void doWork (String s) throws Exception{
 
		    String [] ar = s.split("\\-");
		    try{
		      Class.forName("oracle.jdbc.driver.OracleDriver");
		      con = DriverManager.getConnection(url,userName,password);
		      String queryString = "INSERT INTO feeds ( subject,time,creator) values('"+ar[0]+"','"+ar[1]+"','"+ar[2]+"')"; 
 
		      stmt=con.createStatement();
		      val = stmt.executeUpdate(queryString);
 
		    }
		    catch(Exception e)
		    {
		      System.out.println("e : " + e);
		    }
	  }

Error message I am getting again when i run the program:

e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver
e : java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver

Are you sure you have the JDBC driver installed correctly? It doesn't look like it can find it..