public void testOracle() {
    try {
      Class.forName("oracle.jdbc.driver.OracleDriver");
      Connection conn = DriverManager.getConnection(
          "jdbc:oracle:thin:@localhost:1521:orcl", "system", "admin");
      System.out.println("连接成功！");
      Statement stmt = conn.createStatement();
      ResultSet rs = stmt.executeQuery("select *　from　stu_info_tab");
      while (rs.next()) {
        System.out.println("ok");
        System.out.println(rs.getInt("student_id"));
      }
      rs.close();
      stmt.close();
      conn.close();
    } catch (ClassNotFoundException e) {
      System.out.println("ClassNotFoundException");
    } catch (SQLException e) {
      System.out.println("SQLException");
    }
}