利用Oracle自带的连接池类的一例

 
/**
封装了对数据库的连接，用于处理SQL语句。
@author:yancheng(sharetop studio)
@version:1.0.0
*/
package DBUtil;

import java.sql.*;
import java.io.*;
import javax.sql.*;
import javax.naming.*;
import oracle.jdbc.pool.*;

public class OraPooledSQL
{

private PooledConnection dbpool;

/**
@param ConnectionURL 连接名 如: jdbc:odbc:myODBC
@param UserID 用户名
@param PassWord 用户密码
*/
public OraPooledSQL(String ConnectionURL,String UserID,String PassWord)
{

try{

OracleConnectionPoolDataSource ocpds = new OracleConnectionPoolDataSource();

ocpds.setURL(ConnectionURL);

ocpds.setUser(UserID);

ocpds.setPassword(PassWord);

dbpool = ocpds.getPooledConnection();

}
catch(Exception ex)
{
System.err.println("Error in PooledSQL-construct : ");
ex.printStackTrace(System.err);
}

}//end OraPooledSQL

//close dbpool
protected void finalize()
{
if( dbpool != null )
{
try
{
dbpool.close();
}
catch(Exception ex)
{
}
}
}

/**
用于更新、添加或删除的SQL语句
@param SQL SQL语句字串，如：insert into tablename values(id,......)
*/
public int Update(String SQL)
{
Statement stmt = null;
int rc = 0;

Connection connection = null;

try
{
connection = dbpool.getConnection();
stmt = connection.createStatement();
rc = stmt.executeUpdate(SQL);
}

catch( Exception ex )
{
System.err.println("Error in Update - OraPooledSQL : ");
ex.printStackTrace(System.err);
}

return rc;

} //end Update()

/**
用于查询的SQL语句
@param SQL SQL语句字串，如：select * from tablename
*/
public ResultSet Query(String SQL)
{
Statement stmt = null;
ResultSet rs = null;
Connection connection = null;

try
{
connection = dbpool.getConnection();
stmt = connection.createStatement();
rs = stmt.executeQuery(SQL);
}

catch( Exception ex )
{
System.err.println("Error in Query - SQLBean : ");
ex.printStackTrace(System.err);
}

return rs;

} //end Query

} //end Class

原文转自：http://www.ltesting.net