做JAVA的web，数据库连接Sybase,可行吗？
我用Servlet在另一个类WpxxdjServle里做修改查询，一直没成功 ,Sybase里面用例代码如下，里面的main函数我调用不出来，大家有啥好办法？
import java.io.*;
import java.sql.*;

public class JDBCConnect
{
  public static void main( String args[] )
  {
  try
  {
String arg;
  Connection con;

  // Select the JDBC driver and create a connection.
// May throw a SQLException.
// Choices are:
// 1. jConnect driver
// 2. SQL Anywhere JDBC 3.0 driver
// 3. SQL Anywhere JDBC 4.0 driver
arg = "jdbc4";
  if( args.length > 0 ) arg = args[0];
  if( arg.compareToIgnoreCase( "jconnect" ) == 0 )
{
con = DriverManager.getConnection(
"jdbc:sybase:Tds:localhost:2638", "DBA", "sql");
}
  else if( arg.compareToIgnoreCase( "jdbc3" ) == 0 )
{
  DriverManager.registerDriver( (Driver)
  Class.forName(
"sybase.jdbc.sqlanywhere.IDriver").newInstance()
  );
con = DriverManager.getConnection(
"jdbc:sqlanywhere:uid=DBA;pwd=sql" );
}
  else
{
con = DriverManager.getConnection(
"jdbc:sqlanywhere:uid=DBA;pwd=sql" );
}

  System.out.println("Using "+arg+" driver");
 
  // Create a statement object, the container for the SQL
  // statement. May throw a SQLException.
  Statement stmt = con.createStatement();

  // Create a result set object by executing the query.
  // May throw a SQLException.
  ResultSet rs = stmt.executeQuery(
  "SELECT ID, GivenName, Surname FROM Customers");

  // Process the result set.
  while (rs.next())
  {
  int value = rs.getInt(1);
  String FirstName = rs.getString(2);
  String LastName = rs.getString(3);
  System.out.println(value+" "+FirstName+" "+LastName);
  }
  rs.close();
  stmt.close();
  con.close();
  }
  catch (SQLException sqe)
  {
  System.out.println("Unexpected exception : " +
  sqe.toString() + ", sqlstate = " +
  sqe.getSQLState());
  System.exit(1);
  }
  catch (Exception e)
  {
  e.printStackTrace();
  System.exit(1);
  }

  System.exit(0);
  }
}

------解决方案--------------------
加个断点检查下哪步走不下去了，然后再去找解决方案。
------解决方案--------------------
可以连sybase数据库