Solution 2: POST
Does an applet have the ability to POST variables? Yes, it does. And gone are the security problems and visibility of parameters, plus the 3 layers are neatly seperated! Stunning, stunning, stunning.
A piece of Java code at forums.java.sun.com/... offers hope with a HttpURLConnection.

Alas, the applet crashes with a ClassCastException in the statement:

HttpURLConnection http = (HttpURLConnection)url.openConnection();

Grmbl, the JVM's of the different browsers have annoying differences. The browser specific classes for HttpURLConnection differ too much.
It takes a bit of puzzling and trial and error to get things working. The java code below posts variables to a PHP script on the web server private Vector postResult()
throws MalformedURLException, IOException
{ URL url;
URLConnection con;
OutputStream oStream;
String parametersAsString;
byte[] parameterAsBytes;
String aLine; // only if reading response
parametersAsString = "msg=hello&to=world";
parameterAsBytes = parametersAsString.getBytes();
// send parameters to server
url = this.getCodeBase();
url = new URL(url + "index.php3");
con = url.openConnection();
con.setDoOutput(true);
// setDoInput(true); // only if reading response
con.setDoInput(false);
con.setRequestProperty("Content=length", String.valueOf(parameterAsBytes.length));
oStream = con.getOutputStream();
oStream.write(parameterAsBytes);
oStream.flush();
oStream.close();
}

Dear Mr. J. Applet,
Received your message.
Stored contents well.

The server generates a response, lines with text. The applet can read this generated response and use it as input.

The example below shows the server response on the Java console. This piece of Java code will be between the oStream.flush() and the oStream.close(). oStream.flush();
// read response from server
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
aLine = in.readLine();
while (aLine != null)
{ System.out.println(line);
aLine = in.readLine();
}
in.close();
oStream.close();
It works. Good, I'm happy. Got a Java applet talking with a server application:

no messing about with secret passwords,
and with a neat separation between the object and the database layer.

shamanpyro wrote:consegui. Fiz uma gambiarra mas funcionou ^^. Obrigado pela ajuda