proxool难搞的问题

用proxool的propeties方法，设置数据库连接，总是出错:
org.logicalcobwebs.proxool.ProxoolException: Couldn't load property file hsqldb.properties

以下是我的代码:

1.  hsqldb.properties


jdbc-0.proxool.alias=hsqldb
jdbc-0.proxool.driver-class=oracle.jdbc.driver.OracleDriver
jdbc-0.proxool.driver-url=jdbc:oracle:thin:@192.168.1.61:1521:ORCL
jdbc-0.user=xxxx
jdbc-0.password=xxxxxxx
jdbc-0.proxool.maximum-connection-count=20
jdbc-0.proxool.prototype-count=4

jdbc-0.proxool.house-keeping-test-sql=select CURRENT_DATE
jdbc-0.proxool.verbose=true
jdbc-0.proxool.statistics=10s,1m,1d
jdbc-0.proxool.statistics-log-level=ERROR

放在与WEB-INF相同的一个file目录里，发布时可以直接映射到webapp/web-inf/classes下面.<服务器tomcat>

2.  web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">


<servlet>
<servlet-name>proxoolServletConfigurator</servlet-name>
<servlet-class>
org.logicalcobwebs.proxool.configuration.ServletConfigurator
</servlet-class>
<init-param>
<param-name>propertyFile</param-name>
<param-value>WEB-INF/classes/hsqldb.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
</web-app>

3.   测试类DBTest.java


import java.sql.*;
import org.logicalcobwebs.proxool.configuration.PropertyConfigurator; 
import org.logicalcobwebs.proxool.ProxoolException;

public class DBTest {

    public static void main(String[] args) {

String db = "hsqldb";
if(args.length > 0 )
{
db = args[0];
}

Connection conn=null;

        try {
PropertyConfigurator.configure(db + ".properties");
conn = DriverManager.getConnection("proxool." + db);

            if(conn!=null)
                System.out.println("数据连接测试成功！");
            Statement Stmt=conn.createStatement();
            ResultSet Rst=null;
            Rst=Stmt.executeQuery("select * from testTable");
            while(Rst.next()) 
                 System.out.println(Rst.getString("name"));
        }catch(SQLException e) {
           System.out.println("error : "+e);
        }catch(ProxoolException e1){
           System.out.println(e1);
        } finally{
            try{
                 if (conn != null)
                       conn.close();
            }catch(SQLException e2){
                  System.out.println(e2);
            }
          }
    }
}