jdbc 连接oracle10g 出错

[Mamingxilong]

你们好！我还是同样的问题向你请教：下面是我的程序代码：
import java.sql.*;
import javax.swing.*;

class ConnectServer2{
static Connection con=null;
public static boolean conn(String url,String username,String password){
try{
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
}catch(Exception e){e.printStackTrace();return false;}
try{
con=DriverManager.getConnection(url,username,password);
}catch(SQLException e){e.printStackTrace();return false;}
return true;

}//end method conn
public static boolean close(){
try{
con.close();
con=null;
}catch(SQLException e){return false;}
return true;

}//end close
public static void main(String args[]){
if(conn("jdbc:oracle:thin:@localhost:1521:xsda","SYSTEM","cnqig")){
JOptionPane.showMessageDialog(null,"数据库连接成功！");
close();
}
else
JOptionPane.showMessageDialog(null,"数据库连接失败！");
}//end method main


}//enc class
我也把驱动类classes12.jar加入classpath去了，但在没有加入internet网的电脑可以连接成功，在加入internet网的电脑上却出现以下错误代码:

java.sql.SQLException: Listener refused the connection with the following error:

ORA-12505, TNS:listener does not currently know of SID given in connect descript
or
The Connection descriptor used by the client was:
localhost:1521:xsda

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:261)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:
414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtensio
n.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at ConnectServer2.conn(ConnectServer2.java:11)
at ConnectServer2.main(ConnectServer2.java:25)
我把localhost换成我的IP地址192.168.1.17却出现以下错误：
java.sql.SQLException: Io 异常: Bad packet type
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java
:255)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:
414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtensio
n.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at ConnectServer2.conn(ConnectServer2.java:11)
at ConnectServer2.main(ConnectServer2.java:25)
我怎的搞不懂是怎么回事，请老师们指教！在此感谢！盼尽快回复！

[shengli_liao]

注意客户端与服务器端的区别

[老紫竹]

ORA-12505, TNS:listener does not currently know of SID given in connect descript
SID 错误
建议你更新你的驱动。classes12 这个太老了。Oracle 自带的驱动应该叫 ojdbc.jar
用最新版的哦！

[bootupnow]

ORA-12505, TNS:listener does not currently know of SID given in connect descript
or
The Connection descriptor used by the client was:
localhost:1521:xsda
这个你没有配置正确吗？去net manager里看看，设置一下。

有个readme.txt好像说明了classes12,ojdbc.jar这些文件是适用于哪些jdk的，尽量使之对应吧。