这次给大家带来怎么实现不刷新的ajax分页,实现不刷新ajax分页的注意事项有哪些,下面就是实战案例,一起来看一下。
紧接着上篇—分页技术原理与实现之java+oracle代码实现分页(二) ,本篇继续分析分页技术。上篇讲的是分页技术的代码实现,这篇继续分析一下分页技术的效果控制。
上篇已经用代码简单的实现了一个分页。但是我们都看到,代码中每次通过servlet请求取得结果集后,都会转向到一个jsp页面显示结果,这样每次查询页面都会刷新一下,比如查询出现结果集后要查看第三页,页面就会刷新一下。这样页面给人的效果感觉就会有点不舒服,所以我们希望能够在通过条件查询结果集后无论访问哪一页,页面都不会刷新,而只是结果集变化。要解决这个,我想大家很容易就会想到ajax了。
是啊,这就要请ajax出山了。当通过查询条件查询到结果集后,以后每次访问任何一页都通过ajax来访问,使用异步ajax与servlet进行交互,将结果查询出来返回给ajax,这样页面内容因为ajax返回结果而改变,而页面却不会刷新,这就实现了无刷新的分页技术。
下面我们来看一个简单的无刷新分页实现,代码如下:
<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="../lib/jquery_pagination/pagination.css" mce_href="lib/jquery_pagination/pagination.css" />
<mce:script type="text/<a href="http://lib.csdn.net/base/javascript" class='replace_word' title="javascript知识库" target='_blank' style='color:#df3434; font-weight:bold;'>javascript</a> src=../lib/<a href="http://lib.csdn.net/base/jquery" class='replace_word' title="jquery知识库" target='_blank' style='color:#df3434; font-weight:bold;'>jquery</a>/jquery.min.js mce_src=lib/jquery/jquery.min.js></mce:script>
<mce:script type="text/javascript"
src="../lib/jquery_pagination/jquery.pagination.js"></mce:script>
<mce:script type="text/javascript"><!--
/**
* callback function that displays the content.
*
* gets called every time the user clicks on a pagination link.
*
* @param {int}page_index new page index
* @param {jquery} jq the <a href="http://lib.csdn.net/base/docker" class='replace_word' title="docker知识库" target='_blank' style='color:#df3434; font-weight:bold;'>container</a> with the pagination links as a jquery object
*/
function pageselectcallback(page_index, jq) {
var new_content = $('#hiddenresult p.result:eq(' + page_index + ')')
.clone();
$('#searchresult').empty().append(new_content);
return false;
}
function initpagination() {
var num_entries = $('#hiddenresult p.result').length;
// create pagination element
$(#pagination).pagination(num_entries, {
num_edge_entries : 2,
num_display_entries : 8,
callback : pageselectcallback,
items_per_page : 1
});
}
// when the html has loaded, call initpagination to paginate the elements
$(document).ready(function() {
initpagination();
});
// --></mce:script>
<mce:style type="text/css"><!--
* {
padding: 0;
margin: 0;
}
body {
background-color: #fff;
margin: 20px;
padding: 0;
height: 100%;
font-family: arial, helvetica, sans-serif;
}
#searchresult {
margin-top: 15px;
margin-bottom: 15px;
border: solid 1px #eef;
padding: 5px;
background: #eef;
width: 40%;
}
#searchresult p {
margin-bottom: 1.4em;
}
--></mce:style><style type="text/css" mce_bogus="1">* {
padding: 0;
margin: 0;
}
body {
background-color: #fff;
margin: 20px;
padding: 0;
height: 100%;
font-family: arial, helvetica, sans-serif;
}
#searchresult {
margin-top: 15px;
margin-bottom: 15px;
border: solid 1px #eef;
padding: 5px;
background: #eef;
width: 40%;
}
#searchresult p {
margin-bottom: 1.4em;
}</style>
<title>pagination</title>
</head>
<body>
<h4>
jquery pagination plugin demo
</h4>
<p id="pagination" class="pagination">
</p>
<br style="clear: both;" mce_style="clear: both;" />
<p id="searchresult">
this content will be replaced when pagination inits.
</p>
<p id="hiddenresult" style="display: none;" mce_style="display: none;">
<p class="result">
<p>
globally maximize granular outside the box thinking vis-a-vis
quality niches. proactively formulate 24/7 results whereas 2.0
catalysts for change. professionally implement 24/365 niches rather
than client-focused users.
</p>
<p>
competently engineer high-payoff outside the box thinking through
cross functional benefits. proactively transition intermandated
processes through open-source niches. progressively engage
maintainable innovation and extensible interfaces.
</p>
</p>
<p class="result">
<p>
credibly fabricate e-business models for end-to-end niches.
compellingly disseminate integrated e-markets without ubiquitous
services. credibly create equity invested channels with
multidisciplinary human capital.
</p>
<p>
interactively integrate competitive users rather than fully tested
infomediaries. seamlessly initiate premium functionalities rather
than impactful architectures. rapidiously leverage existing
resource-leveling processes via user-centric portals.
</p>
</p>
<p class="result">
<p>
monotonectally initiate unique e-services vis-a-vis client-centric
deliverables. quickly impact parallel opportunities with b2b
bandwidth. synergistically streamline client-focused
infrastructures rather than b2c e-commerce.
</p>
<p>
phosfluorescently fabricate 24/365 e-business through 24/365 total
linkage. completely facilitate high-quality systems without
stand-alone strategic theme areas.
</p>
</p>
</p>
</body>
</html>
这就是一个非常简单的无刷新分页实现,使用了jquery+ jquery.pagination框架。现在随着框架的流行,尤其是jquery的流行,使用框架来开发是非常有效的。上面代码原理在代码中已有注释,也可参考jquery的官方网站:。
现在就可以来开发我们的ajax无刷新分页实现。基于上面的原理,在响应页码被按下的代码中pageselectcallback(),我们使用一个ajax异步访问数据库,通过点击的页号将结果集取出后再用异步设置到页面,这样就可以完成了无刷新实现。
页码被按下的响应函数pageselectcallback()修改如下:
这样就可以用异步方式获取结果,用showresponse函数来处理结果了,showresponse函数如下:
function showresponse(request){
var content = request;
var root = content.documentelement;
var responsenodes = root.getelementsbytagname(root);
var itemlist = new array();
var pagelist=new array();
alert(responsenodes.length);
if (responsenodes.length > 0) {
var responsenode = responsenodes[0];
var itemnodes = responsenode.getelementsbytagname(data);
for (var i=0; i<itemnodes.length; i++) {
var idnodes = itemnodes[i].getelementsbytagname("id");
var namenodes = itemnodes[i].getelementsbytagname("name");
var sexnodes=itemnodes[i].getelementsbytagname("sex");
var agenodes=itemnodes[i].getelementsbytagname("age");
if (idnodes.length > 0 && namenodes.length > 0&&sexnodes.length > 0&& agenodes.length > 0) {
var id=idnodes[0].firstchild.nodevalue;
var name = namenodes[0].firstchild.nodevalue;
var sex = sexnodes[0].firstchild.nodevalue;
var age=agenodes[0].firstchild.nodevalue;
itemlist.push(new array(id,name, sex,age));
}
}
var pagenodes = responsenode.getelementsbytagname(pagination);
if (pagenodes.length>0) {
var totalnodes = pagenodes[0].getelementsbytagname(total);
var startnodes = pagenodes[0].getelementsbytagname(start);
var endnodes=pagenodes[0].getelementsbytagname(end);
var currentnodes=pagenodes[0].getelementsbytagname(pageno);
if (totalnodes.length > 0 && startnodes.length > 0&&endnodes.length > 0) {
var total=totalnodes[0].firstchild.nodevalue;
var start = startnodes[0].firstchild.nodevalue;
var end = endnodes[0].firstchild.nodevalue;
var current=currentnodes[0].firstchild.nodevalue;
pagelist.push(new array(total,start,end,current));
}
}
}
showtable(itemlist,pagelist);
}
如上代码就是用来处理通过ajax异步请求servlet后返回的xml格式的结果,其中servlet代码在上篇中。其中itemlist、pagelist分别是解析返回后生成的用户list和分页导航,这样用户就可以以自己的展现方式展现数据了。
function pageselectcallback(page_index, jq){
var pars=pageno=+(page_index+1);
$.ajax({
type: post,
url: userbasicsearchservlet,
cache: false,
data: pars,
success: showresponse
});
return false;
}
相信看了本文案例你已经掌握了方法,更多精彩请关注其它相关文章!
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以上就是怎么实现不刷新的ajax分页的详细内容。