学步园

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();
    }
   }
 }