当前路径：Classes/PHPExcel/Cell/DataValidation.php
<?php

/**
 * PHPExcel_Cell_DataValidation
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Cell
 * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */
class PHPExcel_Cell_DataValidation
{
    /* Data validation types */
    const TYPE_NONE        = 'none';
    const TYPE_CUSTOM      = 'custom';
    const TYPE_DATE        = 'date';
    const TYPE_DECIMAL     = 'decimal';
    const TYPE_LIST        = 'list';
    const TYPE_TEXTLENGTH  = 'textLength';
    const TYPE_TIME        = 'time';
    const TYPE_WHOLE       = 'whole';

    /* Data validation error styles */
    const STYLE_STOP         = 'stop';
    const STYLE_WARNING      = 'warning';
    const STYLE_INFORMATION  = 'information';

    /* Data validation operators */
    const OPERATOR_BETWEEN             = 'between';
    const OPERATOR_EQUAL               = 'equal';
    const OPERATOR_GREATERTHAN         = 'greaterThan';
    const OPERATOR_GREATERTHANOREQUAL  = 'greaterThanOrEqual';
    const OPERATOR_LESSTHAN            = 'lessThan';
    const OPERATOR_LESSTHANOREQUAL     = 'lessThanOrEqual';
    const OPERATOR_NOTBETWEEN          = 'notBetween';
    c...