YII 类库手册

protected function createPageButton($label,$page,$class,$hidden,$selected)
{
    if($hidden || $selected)
        $class.=' '.($hidden ? self::CSS_HIDDEN_PAGE : self::CSS_SELECTED_PAGE);
    return '<li class="'.$class.'">'.CHtml::link($label,$this->createPageUrl($page)).'</li>';
}

protected function createPageButtons()
{
    if(($pageCount=$this->getPageCount())<=1)
        return array();

    list($beginPage,$endPage)=$this->getPageRange();
    $currentPage=$this->getCurrentPage(false); // currentPage is calculated in getPageRange()
    $buttons=array();

    // first page
    $buttons[]=$this->createPageButton($this->firstPageLabel,0,self::CSS_FIRST_PAGE,$currentPage<=0,false);

    // prev page
    if(($page=$currentPage-1)<0)
        $page=0;
    $buttons[]=$this->createPageButton($this->prevPageLabel,$page,self::CSS_PREVIOUS_PAGE,$currentPage<=0,false);

    // internal pages
    for($i=$beginPage;$i<=$endPage;++$i)
        $buttons[]=$this->createPageButton($i+1,$i,self::CSS_INTERNAL_PAGE,false,$i==$currentPage);

    // next page
    if(($page=$currentPage+1)>=$pageCount-1)
        $page=$pageCount-1;
    $buttons[]=$this->createPageButton($this->nextPageLabel,$page,self::CSS_NEXT_PAGE,$currentPage>=$pageCount-1,false);

    // last page
    $buttons[]=$this->createPageButton($this->lastPageLabel,$pageCount-1,self::CSS_LAST_PAGE,$currentPage>=$pageCount-1,false);

    return $buttons;
}

protected function getPageRange()
{
    $currentPage=$this->getCurrentPage();
    $pageCount=$this->getPageCount();

    $beginPage=max(0, $currentPage-(int)($this->maxButtonCount/2));
    if(($endPage=$beginPage+$this->maxButtonCount-1)>=$pageCount)
    {
        $endPage=$pageCount-1;
        $beginPage=max(0,$endPage-$this->maxButtonCount+1);
    }
    return array($beginPage,$endPage);
}

public function init()
{
    if($this->nextPageLabel===null)
        $this->nextPageLabel=Yii::t('yii','Next >');
    if($this->prevPageLabel===null)
        $this->prevPageLabel=Yii::t('yii','< Previous');
    if($this->firstPageLabel===null)
        $this->firstPageLabel=Yii::t('yii','<< First');
    if($this->lastPageLabel===null)
        $this->lastPageLabel=Yii::t('yii','Last >>');
    if($this->header===null)
        $this->header=Yii::t('yii','Go to page: ');

    if(!isset($this->htmlOptions['id']))
        $this->htmlOptions['id']=$this->getId();
    if(!isset($this->htmlOptions['class']))
        $this->htmlOptions['class']='yiiPager';
}

public function registerClientScript()
{
    if($this->cssFile!==false)
        self::registerCssFile($this->cssFile);
}

public static function registerCssFile($url=null)
{
    if($url===null)
        $url=CHtml::asset(Yii::getPathOfAlias('system.web.widgets.pagers.pager').'.css');
    Yii::app()->getClientScript()->registerCssFile($url);
}

public function run()
{
    $this->registerClientScript();
    $buttons=$this->createPageButtons();
    if(empty($buttons))
        return;
    echo $this->header;
    echo CHtml::tag('ul',$this->htmlOptions,implode("\n",$buttons));
    echo $this->footer;
}