How to use ColdFusion datasource from JAVA

Hello, every one:

I'm trying to figure out the way to connect to database from my java data access class by using ColdFusion configured datasource.

But, I have not get any luck.

Here is my test code: Please help.

//Test1.java
import java.sql.*;

public class Test1
{
        public static void main(String argv[])
        {
                try
                {
                        coldfusion.server.DataSourceService dsr = coldfusion.server.ServiceFactory.getDataSourceService();
                        javax.sql.DataSource ds = dsr.getDatasource("project");  //"project" is a datasource name configured in CF admin
                        Connection con = ds.getConnection();
                        /* if connected, do some thing */
                }
                catch ( Exception e1 )
                {
                        System.out.println(e1.toString());
                }
        }
}

I have got it compiled.

But when run it, I got the folowing error:

"coldfusion.server.ServiceFactory$ServiceNotAvailableException: The '' service is not available"

Any idea ? 

Thanks.

Shiofan