怎样才能找到驱动程序？

Question

有下面一样一个类，在该类的文件夹下有驱动程序class12.jar，编译运行老是提示找不到驱动程序，请问怎样才能找到驱动程序？
import java.sql.*;public class Conn
{    String sDBDriver;
    Connection connect;
    Statement stmt;
    ResultSet rs;
    String URL;
    String user;
    String password;    public Conn()
    {
        sDBDriver = "oracle.jdbc.driver.OracleDriver";
        connect = null;
        stmt = null;
        rs = null;
        URL = "jdbc:oracle:thin:@127.0.0.1:1521:hp";
        user = "pll";
        password = "ttt";
        try
        {
            Class.forName(sDBDriver);
        }
        catch(ClassNotFoundException classnotfoundexception)
        {
            System.err.println(classnotfoundexception.getMessage());
        }
    }    public ResultSet executeQuery(String s)
    {
        try
        {
            connect = DriverManager.getConnection(URL, user, password);
            stmt = connect.createStatement();
            rs = stmt.executeQuery(s);
        }
        catch(SQLException sqlexception)
        {
            System.err.println(sqlexception.getMessage());
        }
        return rs;
    }    public void endconn()
    {
        try
        {
            stmt.close();
            connect.close();
        }
        catch(SQLException sqlexception)
        {
            System.err.println(sqlexception.getMessage());
        }
    }    public String callprocedure(String s)
    {
        try
        {
            connect = DriverManager.getConnection(URL, user, password);
            String s1 = s;
            CallableStatement callablestatement = connect.prepareCall(s1);
            callablestatement.executeUpdate();
            connect.close();
        }
        catch(SQLException sqlexception)
        {
            System.err.println(sqlexception.getMessage());
        }
        return "ok boy";
    }
   public static void main(String[] args) throws SQLException {
        // TODO code application logic here
       Conn conn=new Conn();
       ResultSet rs =conn.executeQuery("select table_name from all_tables");
       while(rs.next())
       {
           System.out.println(rs.getString(1));
       }
       conn.endconn();
    }
}

Answer 1

驱动放到工程的lib下面；如果用了tomcat的话可以放在tomcat的commen的lib目录下也行；使用eclipse的话直接在工程属性里往
进倒这个包也行～～

Answer 2

eclipse-window-preferences-java-buildPath-user Libraries 添加JAR

Answer 3

........
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如果楼主有用IDE的话,把其添加入IDE的这个项目库(Lib)里..如果在命令行下的话,把jar放classpath里或者直接把jar包解压缩出来,里面的文件夹和待编译的java文件放一个同级目录里...