为什么数据库有时连得上，有时连不上

[ye_zhy]

为什么我的程序在连数据库时有时能连得上，有时就连不上
import java.util.*;
import java.sql.*;
import com.sybase.jdbc2.jdbc.*;
public class DBConn {
Connection c=null;
private static String user = null;
private static String password = null;
private static String owner = null;
private static String dburl = null;
private static String dbdriver = null;
private String cfgFileName = "DBConn";
pulic Connection getConnect() {
try{
PropertyResourceBundle configBundle = (PropertyResourceBundle)PropertyResourceBundle.getBundle(cfgFileName );
user = configBundle.getString("db.user");
password = configBundle.getString("db.password");
owner = configBundle.getString("db.owner");
dburl = configBundle.getString("db.dburl");
dbdriver = configBundle.getString("db.dbdriver");
Class.forName(dbdriver);
return DriverManager.getConnection(dburl,user,password);
}
catch(Exception e){}
}

[meixiaolong]

你在catch(Exception)){"这里输入一些代码查看错误"}

[ye_zhy]

错误里输出的是“连接已关闭“

[bbc218888]

ipuuippupupu

[bbc218888]

ppooiuuyuy

[shpblk]

Class.forName("com.sybase.jdbc2.jdbc....")

[DragonFly-9]

我用来连接unix Sybase的一段代码你参考一下：
Connection getConnect(String host,String usrname,String pwds)
{
String dbUrlStr = "jdbc:sybase:Tds:" + host;//host="192.168.0.240:5000/callcenter"
try{
Class.forName("com.sybase.jdbc2.jdbc.SybDriver").newInstance();
return DriverManager.getConnection(dbUrlStr,usrname,pwds);
}catch(Exception e)
{
System.out.println(e.getMessage());
return null;
}
}

[xuxb488]

upup^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[DragonFly-9]

年底给分了