/Files/pony/ConnDB.txt(我用到的一个例子)
下面是摘抄的
研究了Proxool连接池的源代码后完成下面的程序，Proxool连接池的配置过程略。 网管u家u.bitscn@com
/**//*
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*@author 我为J狂 建立日期 2007-4-18
*
*/
package net.blogjava.lzqdiy;
import java.net.URL;
import java.sql.*;
import org.logicalcobwebs.proxool.ProxoolException; 网管联盟bitsCN_com
import org.logicalcobwebs.proxool.ProxoolFacade;
import org.logicalcobwebs.proxool.configuration.JAXPConfigurator;
import org.logicalcobwebs.proxool.admin.SnapshotIF;
public class DBConnection
{
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private static boolean initialized = false;
private static int activeCount = 0;
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public static Connection getConnection() throws SQLException
{ 网管bitscn_com
Connection connection = null;
if (!initialized)
{ 网管网www_bitscn_com
init();
}
connection = DriverManager.getConnection("proxool.Develop");
try
{ 网管下载dl.bitscn.com
SnapshotIF snapshot = ProxoolFacade.getSnapshot("Develop", true);
int curActiveCount = snapshot.getActiveConnectionCount();// 获得活动连接数
int availableCount = snapshot.getAvailableConnectionCount();// 获得可得到的连接数 网管联盟bitsCN@com
int maxCount = snapshot.getMaximumConnectionCount();// 获得总连接数
if (curActiveCount != activeCount)// 当活动连接数变化时输出信息
{ 网管论坛bbs_bitsCN_com
System.out.println("----------------------------------");
System.out
.println(curActiveCount + "(active) " + availableCount
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+ "(available) " + maxCount + "(max)");
System.out.println("----------------------------------");
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activeCount = curActiveCount;
}
} catch (ProxoolException e)
{
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// TODO Auto-generated catch block
e.printStackTrace();
}
if (connection != null)
{
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return connection;
} else
{
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throw new NullPointerException(
"Didn't get connection, which probably means that no Driver accepted the URL");
}
} 网管论坛bbs_bitsCN_com
private static void init()
{
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String fileName = "proxool.xml";
URL resourceURL = null;
try
{ 网管网www.bitscn.com
if (Thread.currentThread().getContextClassLoader() != null)
{
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resourceURL = Thread.currentThread().getContextClassLoader()
.getResource(fileName);
}
if (resourceURL == null)
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{
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resourceURL = DBConnection.class.getClassLoader().getResource(
fileName);
}
JAXPConfigurator.configure(resourceURL.getFile(), false); 网管下载dl.bitscn.com
Class.forName("org.logicalcobwebs.proxool.ProxoolDriver");
} catch (ClassNotFoundException e)
{ 网管u家u.bitsCN.com
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ProxoolException e)
{
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// TODO Auto-generated catch block
e.printStackTrace();
}
initialized = true;
}
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}
proxool.xml内容
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<?xml version="1.0" encoding="UTF-8"?>
<something-else-entirely>
<proxool>
<alias>Develop</alias>
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<driver-url>jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.0.6)(PORT=1521)))(CONNECT_DATA=(SID=lzqdiy)(SERVER=DEDICATED)))
</driver-url>
<driver-class>oracle.jdbc.driver.OracleDriver</driver-class>
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<driver-properties>
<property name="user" value="lzqdiy"/>
<property name="password" value="lzqdiy"/>
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</driver-properties>
<maximum-connection-count>120</maximum-connection-count>
<minimum-connection-count>20</minimum-connection-count>
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<house-keeping-test-sql>select CURRENT_DATE</house-keeping-test-sql>
</proxool>
</something-else-entirely>
通过语句：Connection con＝DBConnection.getConnection();来获得一个数据库连接,当活动连接数变化时向控制台输出连接信息。
【转自www.bitsCN.com】