Обсуждение: newbie jdbc3 tiny example

hi everyboy,

I'm newbie with the jdbc and I wish to know how must be driven the connection to a first preparedstatement using jdbc3 (an pg 8.0.3).

My first throw (suspicious) was

[...]

    private Connection                      db;       
    private Statement                       sql;     
    private DatabaseMetaData                dbmd;    
   
    private PreparedStatement               addDVD = null;  
   
 [...] 
        String hostname = "localhost:5432";
        String database = "XXX";
        String user ="abcdefg";
        String psswd ="_______";

       
        try {
            Class.forName("org.postgresql.Driver"); //load the driver
            db = DriverManager.getConnection("jdbc:postgresql://"+hostname+"/"+database+"?"+"user="+username+"&password="+password); //connect to the db
            dbmd = db.getMetaData(); //get MetaData to confirm connection
        }catch (ClassNotFoundException e){
            JOptionPane.showMessageDialog(null, e.getMessage(), "Error Driver pas trouvé", JOptionPane.ERROR_MESSAGE);
        }catch (SQLException e){
            JOptionPane.showMessageDialog(null, e.getMessage(), "Error initialisation connection", JOptionPane.ERROR_MESSAGE);
        }
   
[...]
   
    public PreparedStatement preparedAddDVD(){
        try{
            String insertion =
                    "INSERT INTO FICHES.DVD" +
                    "id," +
                    "titre_o," +
                    "titre_f," +
                    "affiche," +
                    "duree," +
                    "genre," +
                    "resume," +
                    "visites," +
                    "cote," +
                    "imdb," +
                    "directeurs," +
                    "scenaristes," +
                    "acteurs," +
                    "possession_id," +
                    "possesseur," +
                    "acquis," +
                    "achete," +
                    "classement" +
                    "VALUES" +
                    "(" +
                    "default," +
                    "?," + //titreo                         1
                    "?," + //sortie                         2
                    "?," + //fr                             3
                    "?," + //affiche                        4
                    "?," + //duree                          5
                    "?," + //genre                          6
                    "resume," + //TODO null => allocine
                    "1," + //1 visites a faire après
                    "0," + //0 cote
                    "?," + //imdb                           7
                    "?," + //dir                            8
                    "?," + //sce                            9
                    "?," + //act                            10
                    "default," +
                    "current_user," +
                    "current_timestamp," +
                    "?," + //acheté                         11
                    "?," + //classement                     12
                    ")" +
                    ";";
            addDVD = db.prepareStatement(insertion);
            return addDVD;
        }catch (SQLException e){
            JOptionPane.showMessageDialog(null, e.getMessage(), "Error prepare addDVD", JOptionPane.ERROR_MESSAGE);
            return null;
        }

[...]


And, what about the org.postgresql.jdbc3.Jdbc3Connection, ...
the org.postgresql.PGConnection ...

If it's little too long to explain someone can give me some links ?

tks.


--
/**\_____/**\_____/**\_____/**\_____/**\
]                        Signature :
]                    Andy Petrella
]             Rue dessous l'église, 17
]                      4450 Slins                              
]       mail: andy.petrella@gmail.com
]            <licencié en math, info>
]             dea S.I.G. (2005-2006)
\**/"""""""\**/"""""""\**/"""""""\**/"""""""\**/

It seems ok to me.  The idea with JDBC is that you don't have to deal
with implementation specific classes, such as PGConnection,
Jdbc3Connection, etc.  It's all done on the background.  If you are
doing client side prepared statements, your code looks OK.  Prepared
Statements are a JDBC feature, common to all JDBC implementations, so
you don't need any PG specific code.  If you are trying to do Server
side prepared statements, that's something else.  But if you're new to
this, stick  to JDBC prepared statements, and keep your code portable
that way.

On 10/18/05, andy petrella <andy.petrella@gmail.com> wrote:
> hi everyboy,
>
>  I'm newbie with the jdbc and I wish to know how must be driven the
> connection to a first preparedstatement using jdbc3 (an pg 8.0.3).
>
>  My first throw (suspicious) was
>
>  [...]
>
>      private Connection                      db;
>      private Statement                       sql;
>      private DatabaseMetaData                dbmd;
>
>      private PreparedStatement               addDVD = null;
>
>   [...]
>          String hostname = "localhost:5432";
>          String database = "XXX";
>          String user ="abcdefg";
>          String psswd ="_______";
>
>
>          try {
>              Class.forName("org.postgresql.Driver"); //load the driver
>              db =
> DriverManager.getConnection("jdbc:postgresql://"+hostname+"/"+database+"?"+"user="+username+"&password="+password);
> //connect to the db
>              dbmd = db.getMetaData(); //get MetaData to confirm connection
>          }catch (ClassNotFoundException e){
>              JOptionPane.showMessageDialog(null, e.getMessage(), "Error
> Driver pas trouvé", JOptionPane.ERROR_MESSAGE);
>          }catch (SQLException e){
>              JOptionPane.showMessageDialog(null, e.getMessage(), "Error
> initialisation connection", JOptionPane.ERROR_MESSAGE);
>          }
>
>  [...]
>
>      public PreparedStatement preparedAddDVD(){
>          try{
>              String insertion =
>                      "INSERT INTO FICHES.DVD" +
>                      "id," +
>                      "titre_o," +
>                      "titre_f," +
>                      "affiche," +
>                      "duree," +
>                      "genre," +
>                      "resume," +
>                      "visites," +
>                      "cote," +
>                      "imdb," +
>                      "directeurs," +
>                      "scenaristes," +
>                      "acteurs," +
>                      "possession_id," +
>                      "possesseur," +
>                      "acquis," +
>                      "achete," +
>                      "classement" +
>                      "VALUES" +
>                      "(" +
>                      "default," +
>                      "?," + //titreo
>  1
>                      "?," + //sortie
>  2
>                      "?," + //fr
>  3
>                      "?," + //affiche
>  4
>                      "?," + //duree
>  5
>                      "?," + //genre
>  6
>                      "resume," + //TODO null => allocine
>                      "1," + //1 visites a faire après
>                      "0," + //0 cote
>                      "?," + //imdb
>  7
>                      "?," + //dir
>  8
>                      "?," + //sce
>  9
>                      "?," + //act
>  10
>                      "default," +
>                      "current_user," +
>                      "current_timestamp," +
>                      "?," + //acheté
>  11
>                      "?," + //classement
>  12
>                      ")" +
>                      ";";
>              addDVD = db.prepareStatement(insertion);
>              return addDVD;
>          }catch (SQLException e){
>              JOptionPane.showMessageDialog(null, e.getMessage(), "Error
> prepare addDVD", JOptionPane.ERROR_MESSAGE);
>              return null;
>          }
>
>  [...]
>
>
>  And, what about the org.postgresql.jdbc3.Jdbc3Connection,
> ...
>  the org.postgresql.PGConnection ...
>
>  If it's little too long to explain someone can give me some links ?
>
>  tks.
>
>
> --
>  /**\_____/**\_____/**\_____/**\_____/**\
> ]                        Signature :
> ]                    Andy Petrella
> ]             Rue dessous l'église, 17
> ]                      4450 Slins
>
> ]       mail: andy.petrella@gmail.com
> ]            <licencié en math, info>
> ]             dea S.I.G. (2005-2006)
>  \**/"""""""\**/"""""""\**/"""""""\**/"""""""\**/