Обсуждение: Re: [INTERFACES] applet

On 14-Oct-98 Peter T Mount wrote:
>
> Three things here:
>
> 1) The Class.forName() line isn't needed if you use the jdbc.drivers
> property. It doesn't hurt, but not required.


if I cut the line from source code or from .hotjava/properties file I have this
error:

File not found when looking for: postgresql.Driver



> 3) You may be having problems with the null password. If you are using
> trust, or ident authentication (set in pg_hba.conf), then you could put
> anything in here. Otherwise, use "Alter user" to set yourself a password,
> and put it in here.

Ok, but when I wrote a application like basic.java exemple without password it
worked fine.


>
> On Wed, 14 Oct 1998, Andrea Antibo wrote:
>
>> Hi,
>> I'm writing un applet for my application with postgres but it don't load (I
>> think) jdbc driver.
>> I add in .hotjava/properties jdbc.drivers=postgresql.Driver.
>>
>>             try{
>>                     resultsTextArea.setText("elaborazione in corso");
>>
>>                     Class.forName("postgresql.Driver");
>>
>>                     String url = "jdbc:postgres:tesi";
>>                     String usr = "andrea";
>>                     String pwd = "";
>>
>>
>>                     db = DriverManager.getConnection(url, usr, pwd);
>>
>>                     st = db.createStatement();
>>
>>                     ....
>>                     ....
>>             }
>>
>>
>> It jump this try block.
>> What I can do?
>>
>>
>
> --
>        Peter T Mount peter@retep.org.uk
>       Main Homepage: http://www.retep.org.uk
> PostgreSQL JDBC Faq: http://www.retep.org.uk/postgres
>  Java PDF Generator: http://www.retep.org.uk/pdf

On Thu, 15 Oct 1998, Andrea Antibo wrote:

>
> On 14-Oct-98 Peter T Mount wrote:
> >
> > Three things here:
> >
> > 1) The Class.forName() line isn't needed if you use the jdbc.drivers
> > property. It doesn't hurt, but not required.
>
>
> if I cut the line from source code or from .hotjava/properties file I have this
> error:
>
> File not found when looking for: postgresql.Driver

It sounds like the properties file isn't actually being used.

> > 3) You may be having problems with the null password. If you are using
> > trust, or ident authentication (set in pg_hba.conf), then you could put
> > anything in here. Otherwise, use "Alter user" to set yourself a password,
> > and put it in here.
>
> Ok, but when I wrote a application like basic.java exemple without password it
> worked fine.

It can depend. In the past, I've found that most failed connections are
caused by null or empty ("") passwords.

--
       Peter T Mount peter@retep.org.uk
      Main Homepage: http://www.retep.org.uk
PostgreSQL JDBC Faq: http://www.retep.org.uk/postgres
 Java PDF Generator: http://www.retep.org.uk/pdf

>> if I cut the line from source code or from .hotjava/properties file I have
>> this
>> error:
>>
>> File not found when looking for: postgresql.Driver
>
> It sounds like the properties file isn't actually being used.




Please read the message with subject "driver".