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JAVA仿百度分页

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10/02
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最近在做一个仿百度网盘的网页小应用，找到了一个优雅简洁的分页插件，和百度搜索的分页很相似，对他进行了二次封装，拿出来跟大家分享下

插件源码

/**
* This jQuery plugin displays pagination links inside the selected elements.
*
* This plugin needs at least jQuery 1.4.2
*
* @author Gabriel Birke (birke *at* d-scribe *dot* de)
* @version 2.2
* @param {int} maxentries Number of entries to paginate
* @param {Object} opts Several options (see README for documentation)
* @return {Object} jQuery Object
*/
(function($){
/**
* @class Class for calculating pagination values
*/
$.PaginationCalculator = function(maxentries, opts) {
this.maxentries = maxentries;
this.opts = opts;
}

$.extend($.PaginationCalculator.prototype, {
/**
* Calculate the maximum number of pages
* @method
* @returns {Number}
*/
numPages:function() {
return Math.ceil(this.maxentries/this.opts.items_per_page);
},
/**
* Calculate start and end point of pagination links depending on
* current_page and num_display_entries.
* @returns {Array}
*/
getInterval:function(current_page) {
var ne_half = Math.floor(this.opts.num_display_entries/2);
var np = this.numPages();
var upper_limit = np - this.opts.num_display_entries;
var start = current_page > ne_half ? Math.max( Math.min(current_page - ne_half, upper_limit), 0 ) : 0;
var end = current_page > ne_half?Math.min(current_page+ne_half + (this.opts.num_display_entries % 2), np):Math.min(this.opts.num_display_entries, np);

if(np==1){
//alert("只有一页,不显示前一页后一页");
this.opts.prev_show_always=false;
this.opts.next_show_always=false;
}
return {start:start, end:end};
}
});

// Initialize jQuery object container for pagination renderers
$.PaginationRenderers = {}

/**
* @class Default renderer for rendering pagination links
*/
$.PaginationRenderers.defaultRenderer = function(maxentries, opts) {
this.maxentries = maxentries;
this.opts = opts;
this.pc = new $.PaginationCalculator(maxentries, opts);
}

$.extend($.PaginationRenderers.defaultRenderer.prototype, {
/**
* Helper function for generating a single link (or a span tag if it's the current page)
* @param {Number} page_id The page id for the new item
* @param {Number} current_page
* @param {Object} appendopts Options for the new item: text and classes
* @returns {jQuery} jQuery object containing the link
*/
createLink:function(page_id, current_page, appendopts){
var lnk, np = this.pc.numPages();
page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
appendopts = $.extend({text:page_id+1, classes:""}, appendopts||{});
if(page_id == current_page){
lnk = $("<span class='current'>" + appendopts.text + "</span>");
}
else
{
lnk = $("<a>" + appendopts.text + "</a>")
.attr('href', this.opts.link_to.replace(/__id__/,page_id));
}
if(appendopts.classes){ lnk.addClass(appendopts.classes); }
lnk.data('page_id', page_id);
return lnk;
},
// Generate a range of numeric links
appendRange:function(container, current_page, start, end, opts) {
var i;
for(i=start; i<end; i++) {
this.createLink(i, current_page, opts).appendTo(container);
}
},
getLinks:function(current_page, eventHandler,psize) {
var $page = this;
var begin, end,
interval = this.pc.getInterval(current_page),
np = this.pc.numPages(),
fragment = $("<div class='pagination'></div>");
if(isNotEmpty(psize))np = Math.ceil(this.maxentries / psize);
// Generate "Previous"-Link
if(this.opts.prev_text && (current_page > 0 || this.opts.prev_show_always)){
fragment.append(this.createLink(current_page-1, current_page, {text:this.opts.prev_text, classes:"prev"}));
}
// Generate starting points
if (interval.start > 0 && this.opts.num_edge_entries > 0)
{
end = Math.min(this.opts.num_edge_entries, interval.start);
this.appendRange(fragment, current_page, 0, end, {classes:'sp'});
if(this.opts.num_edge_entries < interval.start && this.opts.ellipse_text)
{
jQuery("<span>"+this.opts.ellipse_text+"</span>").appendTo(fragment);
}
}
// Generate interval links
this.appendRange(fragment, current_page, interval.start, interval.end);
// Generate ending points
if (interval.end < np && this.opts.num_edge_entries > 0)
{
if(np-this.opts.num_edge_entries > interval.end && this.opts.ellipse_text)
{
jQuery("<span>"+this.opts.ellipse_text+"</span>").appendTo(fragment);
}
begin = Math.max(np-this.opts.num_edge_entries, interval.end);
this.appendRange(fragment, current_page, begin, np, {classes:'ep'});

}
// Generate "Next"-Link
if(this.opts.next_text && (current_page < np-1 || this.opts.next_show_always)){
fragment.append(this.createLink(current_page+1, current_page, {text:this.opts.next_text, classes:"next"}));
}
$('a', fragment).click(eventHandler);
var psize = (current_page+1);
var proxySzie = (psize>=this.maxentries) ? this.maxentries : psize;
if(this.opts.showSelect)fragment.append("<select class='tm_psize_go'><option value='10'>10</option><option value='12'>12</option><option value='15'>15</option><option value='20'>20</option><option value='30'>30</option><option value='40'>40</option><option value='50'>50</option></select>&nbsp;");
if(this.opts.showGo)fragment.append("<a href='javascript:void(0);' style='float:left;'>共<label class='tmui_page_itemcount'>"+this.maxentries+"</label>条</a>&nbsp;<a href='javascript:void(0);' title='请输入其他页码' style='' class='tm_go'>GO</a><input type='text' title='请输入其他页码' class='tm_number' value='"+proxySzie+"' id='tm_pagego'/>");
return fragment;

}
});

// Extend jQuery
$.fn.pagination = function(maxentries, opts){
// Initialize options with default values
opts = jQuery.extend({
items_per_page:5,
num_display_entries:11,
current_page:0,
num_edge_entries:0,
link_to:"javascript:void(0)",
prev_text:"前一页",
next_text:"后一页",
ellipse_text:"...",
prev_show_always:true,
next_show_always:true,
renderer:"defaultRenderer",
load_first_page:false,
showGo : true,
showSelect:true,
callback:function(){return false;},
goback :function(){

}
},opts||{});

var containers = this,
renderer, links, current_page;

/**
* This is the event handling function for the pagination links.
* @param {int} page_id The new page number
*/
function paginationClickHandler(evt){
var links,
new_current_page = $(evt.target).data('page_id'),
continuePropagation = selectPage(new_current_page);
if (!continuePropagation) {
evt.stopPropagation();
}
return continuePropagation;
}

/**
* This is a utility function for the internal event handlers.
* It sets the new current page on the pagination container objects,
* generates a new HTMl fragment for the pagination links and calls
* the callback function.
*/
function selectPage(new_current_page) {
// update the link display of a all containers
containers.data('current_page', new_current_page);
links = renderer.getLinks(new_current_page, paginationClickHandler);
containers.empty();
links.appendTo(containers);
$(".tm_number").attr("title", " 请输入数字...").on("keydown",
function(e) {
return tm_numberKey($(this), e);
});
// call the callback and propagate the event if it does not return false
var continuePropagation = opts.callback(new_current_page,opts.items_per_page,containers);
init();
return continuePropagation;
}

function selectPage_psize(new_current_page,psize) {
// update the link display of a all containers
containers.data('current_page', new_current_page);
links = renderer.getLinks(new_current_page, paginationClickHandler,psize);
containers.empty();
links.appendTo(containers);
containers.find(".tm_psize_go").find("option[value='"+psize+"']").attr("selected",true);
$(".tm_number").attr("title", " 请输入数字...").on("keydown",
function(e) {
return tm_numberKey($(this), e);
});
// call the callback and propagate the event if it does not return false
var continuePropagation = opts.callback(new_current_page,psize, containers);
init();
return continuePropagation;
}

// -----------------------------------
// Initialize containers
// -----------------------------------
current_page = opts.current_page;
containers.data('current_page', current_page);
// Create a sane value for maxentries and items_per_page
maxentries = (!maxentries || maxentries < 0)?1:maxentries;
opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page;
if(!$.PaginationRenderers[opts.renderer])
{
throw new ReferenceError("Pagination renderer '" + opts.renderer + "' was not found in jQuery.PaginationRenderers object.");
}
renderer = new $.PaginationRenderers[opts.renderer](maxentries, opts);

// Attach control events to the DOM elements
var pc = new $.PaginationCalculator(maxentries, opts);
var np = pc.numPages();
if(np==0 || np==1){
containers.hide();
}else{
containers.show();
}
containers.bind('setPage', {numPages:np}, function(evt, page_id) {
if(page_id >= 0 && page_id < evt.data.numPages) {
selectPage(page_id); return false;
}
});
containers.bind('prevPage', function(evt){
var current_page = $(this).data('current_page');
if (current_page > 0) {
selectPage(current_page - 1);
}
return false;
});
containers.bind('nextPage', {numPages:np}, function(evt){
var current_page = $(this).data('current_page');
if(current_page < evt.data.numPages - 1) {
selectPage(current_page + 1);
}
return false;
});

// When all initialisation is done, draw the links
links = renderer.getLinks(current_page, paginationClickHandler);
containers.empty();
links.appendTo(containers);
// call callback function
if(opts.load_first_page) {
opts.callback(current_page, containers);
}

init();
function init(){
containers.find(".tm_psize_go").find("option[value='"+opts.items_per_page+"']").attr("selected",true);
$('.tm_go', containers).on("click",function(e){
var goPage = $("#tm_pagego").val();
var current_page = containers.data('current_page');
if(isNotEmpty(goPage) && !isNaN(goPage)){
//if(goPage>np)return;
var pno = goPage - 1;
if(pno == current_page)return;
if(goPage==0){
$("#tm_pagego").val(1);
pno = 0;
}

if(goPage>np){
$("#tm_pagego").val(np-1);
pno = np-1;
}
selectPage(pno);
}else{
$("#tm_pagego").focus();
}
stopBubble(e);
});

$('.tm_psize_go', containers).on("change",function(e){
var pageSize = $(this).val();
opts.items_per_page = pageSize;
selectPage_psize(0,pageSize);
});

$(".tm_number").attr("title", " 请输入数字...").on("keydown",
function(e) {
return tm_numberKey($(this), e);
});
}
} // End of $.fn.pagination block

})(jQuery);

引入样式

/*分页*/
.pagination {
font-size: 12px;
margin-left: 30px;
display: block;
margin-top: 20px;
padding-bottom: 30px;
}

.pagination a {
text-decoration: none;
border: solid 1px #ccc;
color: #999;
}

.pagination a,.pagination span {
display: block;
float: left;
padding: 0.3em 0.5em;
margin-right: 5px;
margin-bottom: 5px;
min-width: 1em;
text-align: center;
}

.pagination .current {
background: #999;
color: #fff;
border: solid 1px #ccc;
}

.pagination .current.prev,.pagination .current.next {
color: #999;
border-color: #999;
background: #fff;
}

.tm_psize_go {
padding: 5px;
margin-right: 4px;
float: left;
height: 32px;
line-height: 32px;
position: relative;
border: 1px solid #ccc;
}

#tm_pagego {
height: 31px;
line-height: 31px;
width: 30px;
float: left;
text-align: center;
border: 1px solid #ccc;
}

.btnsi {
margin-left: 15px;
}

.namedd{
width: 200px;
}

//分页初始化

function tm_init_page() {
$("#paged").pagination(itemcount, {
num_display_entries : 3, //主体页数
num_edge_entries : 4,//边缘页数
current_page : 0,//指明选中页码
items_per_page : 10, //每页显示多少条
prev_text : "首页",
next_text : "尾页",
showGo : true/false,//显示
showSelect : false/true,
callback : function(pageNo, psize) {//会回传两个参数一个当前页，显示的页数

写一个加载数据函数
}
});
};