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滚屏加载--无刷新动态加载数据技术的应用

2015-07-16 10:24 731 查看

index.php

<?php

require_once('connect.php'); //连接数据库
$user = array('demo1','demo2','demo3','demo3','<de></de>mo4'); //模拟了几个用户
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>滚屏加载--无刷新动态加载数据技术的应用</title>
<style type="text/css">
#container{margin:10px auto;width: 660px;  border: 1px solid #999;}
.single_item{padding: 20px; border-bottom: 1px dotted #d3d3d3;}
.author{position: absolute; left: 0px; font-weight:bold; color:#39f}
.date{position: absolute; right: 0px; color:#999}
.content{line-height:20px; word-break: break-all;}
.element_head{width: 100%; position: relative; height: 20px;}
.nodata{display:none; height:32px; line-height:32px; text-align:center; color:#999; font-size:14px}
</style>
<script type="text/javascript" src="jquery-1.8.3.min.js"></script>   //需要引入jquery

</head>
<body>
<p class="one" style="margin:20px">提示：使用滚动或拉动滚动条向下看。</p>
<div id="container">
<?php
$query=mysqli_query($link, "select * from say order by id desc limit 0,15");
while ($row=mysqli_fetch_array($query, MYSQLI_ASSOC)) {
?>
<div class="single_item">
<div class="element_head">
<div class="date"><?php echo date('m-d H:i',$row['addtime']);?></div>
<div class="author"><?php echo $user[$row['userid']];?></div>
</div>
<div class="content"><?php echo $row['content'];?></div>
</div>
<?php } ?>
</div>
<div class="nodata"></div>
</body>
<script type="text/javascript">
$(function(){
var winH = $(window).height(); //页面可视区域高度
var i = 1;//设置当前页数
$(window).scroll(function () {
var pageH = $(document.body).height();
var scrollT = $(window).scrollTop(); //滚动条top
var aa = (pageH-winH-scrollT)/winH;
if(aa<0.02){
$.getJSON("result.php",{page:i},function(json){
if(json){
var str = "";
$.each(json,function(index,array){
var str = "<div class=\"single_item\"><div class=\"element_head\">";
var str = str + "<div class=\"date\">"+array['date']+"</div>";
var str = str + "<div class=\"author\">"+array['author']+"</div>";
var str = str + "</div><div class=\"content\">"+array['content']+"</div></div>";
$("#container").append(str);
});
i++;
}else{
$(".nodata").show().html("别滚动了，已经到底了。。。");
return false;
}
});
}

});
});
</script>
</html>

ajax_demo.sql

<?php
$host="localhost";
$db_user="root";
$db_pass="admin";
$db_name="ajax_demo";
$timezone="Asia/Shanghai";
$link=mysqli_connect($host,$db_user,$db_pass);
mysqli_select_db($link, $db_name);
mysqli_query($link, "SET names UTF8");
header("Content-Type: text/html; charset=utf-8");
?>

connect.php

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