@Test  public void testResultSet(){    //獲取id=2的customers數據表的記錄，并打印    Connection connection = null;    Statement statement = null;    ResultSet rs = null;    try {      //1.獲取Connection      connection = JDBCTools.getConnection();      //2.獲取Statement      statement = connection.createStatement();      //3.準備Sql      String sql = "SELECT * FROM CUSTOMERS WHERE ID=2";      //4.執行查詢，得到ResultSet      rs = statement.executeQuery(sql);      //5.處理ResultSet      while(rs.next()){        //rs.get+數據庫中對應的類型+(數據庫中對應的列別名)        int id = rs.getInt("ID");        String name = rs.getString("name");        String email = rs.getString("email");        Date birth = rs.getDate("birth");                System.out.println(id);        System.out.println(name);        System.out.println(email);        System.out.println(birth);      }    } catch (Exception e) {      e.printStackTrace();    }finally{      //6.關閉數據庫相應的資源      JDBCTools.release(rs, statement, connection);    }  }