DBCP使用？！

OSchina上说DBCP不好用，没有多线程？，tomcat7已经不再采用了。可是不管好坏，放在我面前了，我总得看看。但是，使用BasicDataSource，怎么看也没发现使用到池的感觉。close也就是把它自己给干掉。就我想的吧，获取，释放，获取。。 但不是close掉啊。
还好，看到SharedPoolDataSource了，让我有点感觉了。API上还给出了例子，很给力啊。
自己也Test一把。记录下来吧。就这样。

package com.wxg.dbcp;

import java.sql.Connection;
import java.sql.SQLException;

import javax.sql.DataSource;

import org.apache.commons.dbcp.cpdsadapter.DriverAdapterCPDS;
import org.apache.commons.dbcp.datasources.SharedPoolDataSource;

public class Pool
{
    private static DataSource ds;
    private static SharedPoolDataSource tds;

    static
    {
        DriverAdapterCPDS cpds = new DriverAdapterCPDS();
        try {
			cpds.setDriver("oracle.jdbc.driver.OracleDriver");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        cpds.setUrl("jdbc:oracle:thin:@127.0.0.1:1521:ORCL");
        cpds.setUser("kmuser");
        cpds.setPassword("password");

        tds = new SharedPoolDataSource();
        tds.setConnectionPoolDataSource(cpds);
        tds.setMaxActive(10);
        tds.setMaxWait(50);

        ds = tds;
    }

    public static Connection getConnection()
    {
    	Connection conn = null;
        try {
			conn = ds.getConnection();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return conn;
    }  
    
    public static SharedPoolDataSource getSharedPoolDataSource(){
    	return tds;
    }
    
    public static DataSource getDataSource(){
    	return ds;
    }
}

--

package com.wxg.dbcp;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Client {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Connection conn = Pool.getConnection();
		Statement st = null;
		ResultSet rs = null;
		String sql = "select count(*) from T_BO_EMPLOYEE";
		System.out.println(Pool.getSharedPoolDataSource().getNumActive());
		try {
			st = conn.createStatement();
			rs = st.executeQuery(sql);
			while(rs.next()){
				System.out.println(rs.getString(1));
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				if(null != conn){
					conn.close();
				}
				if(null != st){
					st.close();
				}
				if(null != rs){
					rs.close();
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		System.out.println(Pool.getSharedPoolDataSource().getNumActive());
	}

}