javascript项目实战---ajax实现无刷新分页

时间：2021-11-01 01:59:04

分页：

    limit  偏移量，长度;

    limit  0,7;   第一页

    limit  7,7;   第二页

    limit  14,7;  第三页

每页信息条数：7

信息总条数：select count(*) from table

信息总页数：ceil向上取整(总条数/每页条数)
  1. 分页类具体使用

javascript项目实战---ajax实现无刷新分页

<?php

class Pagination {

    private $total; //数据表中总记录数

    private $listRows; //每页显示行数

    private $limit;  //mysql 数据库的limit

    private $uri;  //分页信息前面的uri地址

    private $pageNum; //页数

    private $config = array('header' => "个记录", "prev" => "【上一页】", "next" => "【下一页】", "first" => "【首 页】", "last" => "【尾 页】");

    private $listNum = 8;

    /*

     * $total 当前信息总条数

     * $listRows 每页显示的条数

     * $pa 下面的page

       http://网址/index.php?page=5

     */

    public function __construct($total, $listRows = 10, $pa = "") {

        $this->total = $total;

        $this->listRows = $listRows;

        $this->uri = $this->getUri($pa);

        $this->page = !empty($_GET["page"]) ? $_GET["page"] : 1;//不传入page，则默认显示首页

        $this->pageNum = ceil($this->total / $this->listRows);

        $this->limit = $this->setLimit();

    }

    //设置每页显示的条数

    private function setLimit() {

        return "Limit " . ($this->page - 1) * $this->listRows . ", {$this->listRows}";

    }

    //获得URL地址

    private function getUri($pa) {

        $url = $_SERVER["REQUEST_URI"] . (strpos($_SERVER["REQUEST_URI"], '?') ? '' : "?") . $pa;

        $parse = parse_url($url);

        if (isset($parse["query"])) {

            parse_str($parse['query'], $params);

            unset($params["page"]);

            $url = $parse['path'] . '?' . http_build_query($params);

        }

        return $url;

    }

    //魔术方法，

    public function __get($args) {

        if ($args == "limit")

            return $this->limit;

        else

            return null;

    }

    //页面开始的条数

    private function start() {

        if ($this->total == 0)

            return 0;

        else

            return ($this->page - 1) * $this->listRows + 1;

    }

    //页面结束的条数

    private function end() {

        return min($this->page * $this->listRows, $this->total);

    }

    /*设置首页*/

    private function first() {

        $html = "";

        if ($this->page == 1)

            $html.='&nbsp;'.$this->config["first"].'&nbsp;';

        else

            $html.="&nbsp;<a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=1\")'>{$this->config["first"]}</a>&nbsp;";

            //$html.="&nbsp;<a href='{$this->uri}&page=1'>{$this->config["first"]}</a>&nbsp;";

        return $html;

    }

    /*设置上一页*/

    private function prev() {

        $html = "";

        if ($this->page == 1)

            $html.='&nbsp;'.$this->config["prev"].'&nbsp;';

        else

            $html.="&nbsp;<a href='javascript:void(0)'  onclick='showPage(\"{$this->uri}&page=" . ($this->page - 1) . "\")'>{$this->config["prev"]}</a>&nbsp;";

            //$html.="&nbsp;<a href='{$this->uri}&page=".($this->page-1)."'>{$this->config["prev"]}</a>&nbsp;";

        return $html;

    }

    //页码列表【首页】【2】【3】…………【尾页】

    private function pageList() {

        $linkPage = "";

        $inum = floor($this->listNum / 2);

        for ($i = $inum; $i >= 1; $i--) {

            $page = $this->page - $i;

            if ($page < 1)

                continue;

            $linkPage.="&nbsp;<a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page={$page}\")'>{$page}</a>&nbsp;";

        }

        $linkPage.="&nbsp;{$this->page}&nbsp;";

        for ($i = 1; $i <= $inum; $i++) {

            $page = $this->page + $i;

            if ($page <= $this->pageNum)

                $linkPage.="&nbsp;<a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page={$page}\")'>{$page}</a>&nbsp;";

            else

                break;

        }

        return $linkPage;

    }

   /*设置下一页*/

    private function next() {

        $html = "";

        if ($this->page == $this->pageNum)

            $html.='&nbsp;'.$this->config["next"].'&nbsp;';

        else

            $html.="&nbsp;<a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=" . ($this->page + 1) . "\")'>{$this->config["next"]}</a>&nbsp;";

            //$html.="&nbsp;<a href='{$this->uri}&page=".($this->page + 1)."'>{$this->config["next"]}</a>&nbsp;";

        return $html;

    }

    /*设置尾页*/

    private function last() {

        $html = "";

        if ($this->page == $this->pageNum)

            $html.='&nbsp;'.$this->config["last"].'&nbsp;';

        else

            $html.="&nbsp;<a href='javascript:void(0)' onclick='showPage(\"{$this->uri}&page=" . ($this->pageNum) . "\")'>{$this->config["last"]}</a>&nbsp;";

            //$html.="&nbsp;<a href='{$this->uri}&page=.(this->pageNum).'>{$this->config["last"]}</a>&nbsp;";

        return $html;

    }

    /*设置页面跳转*/

    private function goPage() {

        return

        '&nbsp;<input type="text" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.value;showPage(\'' . $this->uri . '&page=\'+page+\'\')}" value="' . $this->page . '" style="width:25px">

        <input type="button" value="GO" onclick="javascript:var page=(this.previousSibling.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.previousSibling.value;showPage(\'' . $this->uri . '&page=\'+page+\'\')">&nbsp;';

    }

    //页面列表配置选项

    function fpage($display = array(0, 1, 2, 3, 4, 5, 6, 7, 8)) {

        $html[0] = "&nbsp;共有<b>{$this->total}</b>{$this->config["header"]}&nbsp;";

        $html[1] = "&nbsp;每页显示<b>" . ($this->end() - $this->start() + 1) . "</b>条，本页<b>{$this->start()}-{$this->end()}</b>条&nbsp;";

        $html[2] = "&nbsp;<b>{$this->page}/{$this->pageNum}</b>页&nbsp;";

        $html[3] = $this->first();

        $html[4] = $this->prev();

        $html[5] = $this->pageList();

        $html[6] = $this->next();

        $html[7] = $this->last();

        $html[8] = $this->goPage();

        $fpage = '';

        foreach ($display as $index) {

            $fpage.=$html[$index];

        }

        return $fpage;

    }

}

2 数据显示

javascript项目实战---ajax实现无刷新分页

<?php

//链接数据库

//获得具体信息

//分页显示

header("content-type:text/html;charset=utf-8");

$link = mysql_connect('localhost','root','111111');

mysql_select_db('shop', $link);

mysql_query("set names utf8");

$css = <<<eof

<style type="text/css">

    table {border:1px solid black; width:700px; margin:auto; border-collapse:collapse;}

    td {border:1px solid black; }

</style>

eof;

echo $css;

echo "

<table>

    <tr><td>序号</td><td>名称</td><td>数量</td><td>价格</td><td>时间</td></tr>

";

//1 引入分页类

include "./Pagination.php";

//2. 获得信息总条数

$sql = "select * from sw_goods";

$qry = mysql_query($sql);

$total = mysql_num_rows($qry);

$per   = 7;

//3. 实例化分页类对象

$page_obj = new Pagination($total,$per);

//4. 拼装sql语句，获得每页信息

//利用page_obj实现limit的灵活设置

//$page_obj -> limit;

$sqla = "select * from sw_goods ".$page_obj->limit;

$qrya = mysql_query($sqla);

//5. 获得页面列表

$pagelist = $page_obj -> fpage(array(3,4,5,6,7,8));

$i=1;

while($rsta = mysql_fetch_assoc($qrya)){

    echo "<tr>";

    echo "<td>".$i++."</td>";

    echo "<td>".$rsta['goods_name']."</td>";

    echo "<td>".$rsta['goods_number']."</td>";

    echo "<td>".$rsta['goods_price']."</td>";

    echo "<td>".date("Y-m-d H:i:s",$rsta['goods_create_time'])."</td>";

    echo "</tr>";

}

echo "<tr><td colspan=5>".$pagelist."</td></tr>";

echo "</table>";

3 ajax无刷新分页实现

open(‘get’,’http://网址/index.php?page=2’)

javascript项目实战---ajax实现无刷新分页

javascript项目实战---ajax实现无刷新分页

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html>

    <head>

        <title>新建网页</title>

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

        <meta name="description" content="" />

        <meta name="keywords" content="" />

        <script type="text/javascript">

//获得分页信息ajax函数

function showPage(myurl){

    var xhr = new XMLHttpRequest();

    xhr.onreadystatechange = function(){

        if(xhr.readyState==4){

            var rst = document.getElementById("result");

            rst.innerHTML = xhr.responseText;

        }

    }

    xhr.open("get",myurl);

    xhr.send(null);

}

window.onload = function(){

    showPage("./data1.php");  //获得分页信息

    //showPage("./data.php?page=2");

}

        </script>

        <style type="text/css">

        </style>

    </head>

    <body>

        <h2>ajax无刷新分页效果</h2>

        <div id="result"></div>

    </body>

</html>

<script type="text/javascript">

    document.write(new Date()+"<br />");

    document.write(new Date()+"<br />");

    document.write(new Date()+"<br />");

    document.write(new Date()+"<br />");

</script>

javascript项目实战---ajax实现无刷新分页

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