答:程序如下：

package hello.ant;

import java.sql.*;

public class jdbc

{

String dbUrl=jdbc:oracle:thin:@127.0.0.1:1521:orcl;

String theUser=admin;

String thePw=manager;

Connection c=null;

Statement conn;

ResultSet rs=null;

public jdbc()

{

try{

Class.forName(oracle.jdbc.driver.OracleDriver).newInstance();

c = DriverManager.getConnection(dbUrl,theUser,thePw);

conn=c.createStatement();

}catch(Exception e){

e.printStackTrace();

}

}

public boolean executeUpdate(String sql)

{

try

{

conn.executeUpdate(sql);

return true;

}

catch (SQLException e)

{

e.printStackTrace();

return false;

}

}

public ResultSet executeQuery(String sql)

{

rs=null;

try

{

rs=conn.executeQuery(sql);

}

catch (SQLException e)

{

e.printStackTrace();

}

return rs;

}

public void close()

{

try

{

conn.close();

c.close();

}

catch (Exception e)

{

e.printStackTrace();

}

}

public static void main(String[] args)

{

ResultSet rs;

jdbc conn = new jdbc();

rs=conn.executeQuery(select * from test);

try{

while (rs.next())

{

System.out.println(rs.getString(id));

System.out.println(rs.getString(name));

}

}catch(Exception e)

{

e.printStackTrace();

}

}

}