Passing command line JVM params into the code

Question

I am using a set of APIs that basically make a simple JDBC connection to an Oracle database and extract data out of it. However, the way the API has been written it requires the user to specify the Oracle driver parameter on the commad line...So to run the program you do:
java -Djdbc.drivers=oracle.jdbc.driver.OracleDriver Test
Is there any way I could read the -Djdbc.drivers=oracle.jdbc.driver.OracleDriver param into the code without having to include it in the command line? I am planning on making a call to the API via a servlet and not run it from a command line.
Thank you

Answer 1

There are two ways:
1. The simplest one being to hard code the values in some variable in your code. But obviously, this is not the recomended solution since u can change the DB and so the Drivers change.
2. Use Resource Bundle. Resource Bundle allows u to Pick Data from the Properties File(Any Text File with Name=value Pair named as <filename>.properties. Place your
jdbc.drivers=oracle.jdbc.driver.OracleDriver
in this File and then Use the Followint Code
ResourceBundle resBun = ResourceBundle.getBundle("myapp");
// Above Code will luk into the CLasspath for a file viz myapp.properties
// so make sure this Directory where this file exists is within the Classpath.
if(resBun != null)
System.out.println("Checking Property: " + resBun.getValue("jdbc.drivers"));
Hope this Helps.,
Cheers,
Manja