javascript项目实战---ajax实现无刷新分页

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

<?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

<?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’)

<!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>