What Classes do you use for developing Database Applications

Question

Hi ! (sorry for my bad english)
I develop now an application for production planning and I use an informix database-server. I have no problems with the database an the connection. I,m a database expert, but I,m a newcommer in java. What classes do you use to develop a database application ? (specially Table Handling) I tried it with JTable and AbstractTableModel. Are there better possibilities ?
JdbTable OR
JTable with DBTableModel OR
JTable with DBTableModel and DataSet
I know that this is a big question, but some little Informations can help me. (I develop with JBuilder Proffessional)
Thank you for your help.
Wolfgang

Answer 1

No - the classes you have described (AbstractTableModel etc) are Swing classes - that is, they are Models in the MVC GUI architecture. Database-related stuff (SQL at any rate) is contained in the packages java.sql and javax.sql - The latter is part of the Enterprise addition. You would also need to purchase a database driver (or use the sun one, which is something like com.sun.odbc.jdbc.Driver or whatever). The driver supplies you with connections to the database (java.sql.Connection).
Alternatively, you may be deploying code in a J2EE AppServer (eg. WebLogic, WebSphere etc) in which case you can use the JNDI to get a javax.sql.DataSource object (by setting one up in the AppServer and doing a lookup on it) and use this to get database Connections.
  Class c = Class.forName("com.sybase.jdbc2.jdbc.SybDriver");
  SybDriver sybDriver = (SybDriver) c.newInstance();
  java.sql.DriverManager.registerDriver((Driver) sybDriver);
  //then use Driver object to get hold of a Connection
  //or alternatively using DataSources
  InitialContext ctx = new InitialContext();
  DataSource ds = (DataSource) ctx.lookup("jdbc/MyDriver");
  Connection conn = null;
  try{
    Connection conn = ds.getConnection("login", "password");
    Statement stmt = conn.createStatement();
    ResultSet rs = stmt.executeQuery("select * from MY_TABLE");
    while (rs.next()) {
      //columns are enumerated 1...n
      String s = rs.getString(1);
      //or can get by Col Name
      String str = rs.getString("name_col");
  } finally {
    conn.close();
  }Anyway, I hope this helps - you'll probably need to get a book on it (Java Enterprise by O'Reilly is a good one)