connection

JDBC中Class12.jar和ojdbc14.jar的区别
文章分类:数据库
最近在项目中仅常遇到，在这家客户那里邮件发送没问题，可是跑到另外一家客户那里缺发不出去，觉得很奇怪，通过一番折腾之后，把问题落在了Oracle JDBC Driver上，因为在客户现场，用的oracle版本不统一，有些客户使用的是oracle9i，有些使用的是Oracle10g，但是项目中同意使用了ojdbc14.jar做为驱动，那当然就有问题了，以下列出在2个驱动之间的区别：

1.oracle10g中将中文字符解析为3个字节，oracle9i中保留为2个字节，在插入时常常会因为这个问题而造成数据插入失败、超常
2.在处理大字符集的时候，同样存在字符限制，class12只能支持到3000左右吧，ojdbc14可以支持到更长
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package com.bonson.common.tool;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

import com.bonson.common.log4j.Log4jInit;

/**
* 数据库操作类
*
* @classname DataBaseConn
*
* @author linzhou
*
* @version v1.0
*
* @date 2010-4-7
*
* @copyrigth bonson
*/
public class DataBaseConn
{

private static final long serialVersionUID = 8280428586539580616L;

/**
* 创建数据库连接
*
* @return Connection对象
*/
public Connection getConn()
{
  Connection conn = null;
  try
  {
   DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
   //Class.forName("oracle.jdbc.driver.OracleDriver");
   conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.12.208:1521:orcltech","fjcars","fjcars09");
  }
  catch (Exception e)
  {
   Log4jInit.logger(DataBaseConn.this).error("getConn:" + e.toString());
   this.closeConn(conn, null, null, null);
  }
  return conn;
}
/**
* 关闭连接
*
* @param conn
*    Connection对象
* @param stmt
*    Statement对象
* @param rs
*    ResultSet对象
* @param cs
*    CallableStatement对象
*/
public void closeConn(Connection conn, Statement stmt, ResultSet rs, CallableStatement cs)
{
  try
  {
   if (rs != null)
   {
    rs.close();
    rs = null;
   }
   if (stmt != null)
   {
    stmt.close();
    stmt = null;
   }
   if (cs != null)
   {
    cs.close();
    cs = null;
   }
   if (conn != null)
   {
    conn.close();
    conn = null;
   }
  }
  catch (Exception e)
  {
   Log4jInit.logger(DataBaseConn.this).error("closeConn:" + e.toString());
  }
}
}

配置文件

#oracle
jdbc.driverClassName=oracle.jdbc.OracleDriver
#jdbc.url=jdbc:oracle:thin:@(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.46.51.196)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = 10.46.51.198)(PORT = 1521))(LOAD_BALANCE = yes)(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = acsdb)(FAILOVER_MODE =(TYPE = SELECT)(METHOD = BASIC)(RETRIES = 180)(DELAY = 5))))
#jdbc.username=wcity
#jdbc.password=wcity#wcity

jdbc.url=jdbc:oracle:thin:@172.16.16.52:1521:wcitydb
jdbc.username=wcity2
jdbc.password=wcity2

cpool.checkoutTimeout=5000
cpool.minPoolSize=20
cpool.maxPoolSize=50
cpool.maxIdleTime=7200
cpool.maxIdleTimeExcessConnections=1800
cpool.acquireIncrement=10

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