Re: xml property file...for say db connections?
<timasmith@hotmail.com> wrote...
I have code that connects to MS Access *and* code
which connects to an Oracle database.
Does anyone have a code snippet which reads an
XML file to extract properties I can use to
dynamically determine my configuration.
I guess you have these properties in a special object?
Then you can simply use java.beans.XMLCoder and XMLDecoder to serialize that
object in XML.
I found a hack I made several years ago for an app, where I easily could
shift between different connections, not only Oracle and MS Access... ;-)
It's not pretty, but I don't have the time to fix it.
Hopefully you can look at it and see if it's of any use to you.
======================================
private void saveConnections ()
{
try
{
XMLEncoder e =
new XMLEncoder(
new BufferedOutputStream(
new FileOutputStream("Connections.xml")));
Vector cbm = new Vector(connections.values());
int antal = cbm.size();
for (int i = 0; i < antal; i++)
{
ConnectionProperty c =
(ConnectionProperty)
cbm.get(i);
e.writeObject(c);
}
e.close();
}
catch (FileNotFoundException fex)
{
fex.printStackTrace();
}
}
private void loadConnections ()
{
java.beans.XMLDecoder d = null;
try
{
d = new XMLDecoder(
new BufferedInputStream(
new FileInputStream("Connections.xml")));
while (true)
{
ConnectionProperty ci = (ConnectionProperty) d.readObject();
connections.put(ci.getLabel(), ci);
}
}
catch (FileNotFoundException fex)
{
fex.printStackTrace();
}
catch (ArrayIndexOutOfBoundsException aix)
{
d.close();
}
}
======================================
And the class I used for storing the
Connection properties...
======================================
import java.io.*;
public class ConnectionProperty implements Serializable
{
private String label;
private String driver;
private String jar;
private String connectionString;
public ConnectionProperty (String l, String d, String c, String j)
{
label = l;
driver = d;
connectionString = c;
jar = j;
}
public ConnectionProperty ()
{
// For the "Serializability"
}
public String toString()
{
return label;
}
public String getDriver()
{
return driver;
}
public void setDriver(String d)
{
driver = d;
}
public String getJar()
{
return jar;
}
public void setJar(String d)
{
jar = d;
}
public String getLabel()
{
return label;
}
public void setLabel(String s)
{
label = s;
}
public String getConnectionString()
{
return connectionString;
}
public void setConnectionString(String c)
{
connectionString = c;
}
}
======================================
// Bjorn A
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