自己写的一个jQuery分页插件

;(function($){
$.fn.extend({
pageList: function (json) {
function PageList() {
this.initHtml = ""; //初次加载后的Html
this.num = 0; //页码个数
this.totalPageCount = 0;//总页数
this.size = 0;//每页数据条数
this.hiddenPosition = 3;//省略号的位置
this.fwNotNum = 2; //插件前面的非页码个数
this.fwNotNumHtml = "";//插件前面的非页码html
this.backNotNumHtml = "";//插件后面的非页码html
}
PageList.prototype.init = function (objPageList, json) {
var pageListFunction = this;
objPageList.addClass("pageList");
if (json) {
if (!json.total || isNaN(json.total)) {
json.total = 1;
// alert("分页插件total参数异常,插件加载失败");
//return;
}
if (!json.size || isNaN(json.size)) {
json.size = 10;
}
if (!json.num || isNaN(json.num) || json.num < 10) {
json.num = 10;
}
if(!json.ajax){
json.ajax=function(){};
}
}
var fwNotNumHtml = "<a class='pageList_FirstPage'><label>首页</label></a><a class='pageList_PrevPage'>上页</a>";
var backNotNumHtml = "<a class='pageList_NextPage'>下页</a><a class='pageList_LastPage'>末页</a><input class='jumpNum' type='text' value='' /><a class='jumpText' href='javascript:void(0)'>跳转</a>";
var html = "";
html += fwNotNumHtml;
var totalPageCount = Math.ceil(json.total / json.size);

if (totalPageCount <= json.num) {
for (var i = 1; i <= totalPageCount; i++) {
if (i == 1) {
html += "<a class='pageList_Num pageList_Current'>" + i + "</a>";
continue;
}
html += "<a class='pageList_Num'>" + i + "</a>";
}
}
else {
var hidden = json.num - pageListFunction.hiddenPosition;
for (var i = 1; i <= totalPageCount; i++) {
if (i == 1) {
html += "<a class='pageList_Num pageList_Current'>" + i + "</a>";
continue;
}
if (i == hidden) {
html += "<a class='pageList_Hidden'>...</a>";
break;
}
html += "<a class='pageList_Num'>" + i + "</a>";
}
for (var j = pageListFunction.hiddenPosition - 1; j >= 0; j--) {
html += "<a class='pageList_Num'>" + (totalPageCount - j) + "</a>";
}
}
html += backNotNumHtml;
objPageList.html(html);
pageListFunction.initHtml = html;
pageListFunction.num = json.num;
pageListFunction.size = json.size;
pageListFunction.totalPageCount = totalPageCount;
pageListFunction.fwNotNumHtml = fwNotNumHtml;
pageListFunction.backNotNumHtml = backNotNumHtml;
pageListFunction.ajax=json.ajax;
}
PageList.prototype.centerPage = function () { return Math.ceil(this.totalPageCount / 2); }
PageList.prototype.limitData = function () { return this.totalPageCount - this.hiddenPosition - 1; }
PageList.prototype.clickA = function (objA, objPageList) {
var pageListFunction = this;
var clickA = 0;
if (objA.hasClass("pageList_Current") || objA.hasClass("pageList_Hidden")) {
return;
}
else if (objA.hasClass("pageList_Num")) {
clickA = parseInt(objA.html());
}
else if (objA.is(".pageList_FirstPage")) {
if (pageListFunction.getCurrentData(objPageList) == 1)
return;
clickA = 1;
}
else if (objA.is(".pageList_PrevPage")) {
clickA = pageListFunction.getCurrentData(objPageList) - 1;
if (clickA <= 0)
return;
}
else if (objA.is(".pageList_NextPage")) {
clickA = pageListFunction.getCurrentData(objPageList) + 1;
if (clickA > pageListFunction.totalPageCount)
return;
}
else if (objA.is(".pageList_LastPage")) {
if (pageListFunction.getCurrentData(objPageList) == pageListFunction.totalPageCount)
return;
clickA = pageListFunction.totalPageCount;
}
else if (objA.is(".jumpText")||objA.is("input.jumpNum")) {
var clickAtext = $(".jumpNum", objPageList).val();
if (clickAtext == "") return;
clickA = parseInt(clickAtext);
var currentA = pageListFunction.getCurrentData(objPageList);
if (isNaN(clickA)) { return; }
else if (clickA <=0) { return; }
else if (clickA > pageListFunction.totalPageCount) { return; }
else if (clickA == currentA) { return; }
}
pageListFunction.ajax();
pageListFunction.clickNum(clickA, objPageList);
}

PageList.prototype.getCurrentData = function (objPageList) {
return parseInt($("a.pageList_Current",objPageList).html());
}
PageList.prototype.getHiddenFwOrBackData=function(objPageList,type){//返回省略号前面或后面的值
if(type=="fw")
return parseInt($("a.pageList_Hidden",objPageList).prev().html());
else if(type=="back")
return parseInt($("a.pageList_Hidden", objPageList).next().html());
}
PageList.prototype.hiddenFwOrBackHtml = function (type) {//返回省略号前后的htm页码的html
var html = "";
if (type === "fw") {//省略号在前
for (var i = 1; i <= this.hiddenPosition; i++) {
html += "<a class='pageList_Num'>" + i + "</a>";
}
}
else if (type === "back") {//省略号在后
for (var j = this.hiddenPosition - 1; j >= 0; j--) {
html += "<a class='pageList_Num'>" + (this.totalPageCount - j) + "</a>";
}
}
return html;
}
PageList.prototype.addPageList_Current = function (clickNum, objPageList) {
$("a.pageList_Num", objPageList).removeClass("pageList_Current").each(function () {
if (parseInt($(this).html()) == clickNum) {
$(this).addClass("pageList_Current");
}
});
}
PageList.prototype.getHiddenHtml = function () {
return "<a class='pageList_Hidden'>...</a>";
};
PageList.prototype.newHtml = function (type, objPageList, clickNum) {//返回新的Html,只返回不操作
var pageListFunction = this;
var html = "";
if (type == 1)
html += pageListFunction.initHtml;
else if (type == 2) {
html += pageListFunction.fwNotNumHtml; //首页,第一页
html += pageListFunction.hiddenFwOrBackHtml("fw"); //省略号前的数
html += pageListFunction.getHiddenHtml(); //省略号
var start = pageListFunction.totalPageCount - (pageListFunction.num - pageListFunction.hiddenPosition - 1) + 1;
for (var i = start; i <= pageListFunction.totalPageCount; i++) {
html += "<a class='pageList_Num'>" + i + "</a>";
}
html += pageListFunction.backNotNumHtml;
}
else if (type == 3) {
clickNum += 1;
html += pageListFunction.fwNotNumHtml;
var start = clickNum - (pageListFunction.num - pageListFunction.hiddenPosition - 1) + 1;
for (var i = start; i <= clickNum; i++) {
html += "<a class='pageList_Num'>" + i + "</a>";
}
html += pageListFunction.getHiddenHtml();
html += pageListFunction.hiddenFwOrBackHtml("back");
html += pageListFunction.backNotNumHtml;
}
else if (type == 4) {
html += pageListFunction.fwNotNumHtml;
html += pageListFunction.hiddenFwOrBackHtml("fw");
html += pageListFunction.getHiddenHtml();
clickNum -= 1;
var end = pageListFunction.num - pageListFunction.hiddenPosition - 1 + clickNum - 1;
for (var i = clickNum; i <= end; i++) {
html += "<a class='pageList_Num'>" + i + "</a>";
}
html += pageListFunction.backNotNumHtml;
}
return html;
}
PageList.prototype.clickNum = function (clickNum, objPageList) {
var pageListFunction = this;
var html = "";
if (pageListFunction.totalPageCount <= pageListFunction.num) {
pageListFunction.addPageList_Current(clickNum, objPageList); return;
}
else if (clickNum <= 5) {
html = pageListFunction.newHtml(1, objPageList);
}
else if (clickNum >= pageListFunction.limitData()) {
html = pageListFunction.newHtml(2, objPageList);
}
else {
if (clickNum < pageListFunction.centerPage())
html = pageListFunction.newHtml(3, objPageList, clickNum);
else if (clickNum >= pageListFunction.centerPage())
html = pageListFunction.newHtml(4, objPageList, clickNum);
}
objPageList.html(html);
pageListFunction.addPageList_Current(clickNum, objPageList);
}
var objPageList = $(this);
var p = new PageList();
p.init(objPageList, json, p);
objPageList.on("click", "a:not('.pageList_Hidden')", function () {
p.clickA($(this), objPageList);
});
objPageList.on("keyup","input.jumpNum",function(event){
if(event.which===13){
p.clickA($(this), objPageList);
}
});
}
});
})(jQuery);

.pageList{ clear:both; overflow:hidden;}
.pageList .pageList_Nums{ float:left;}
.pageList  a{border:1px solid #ccc; margin-left:10px; float:left; display:block; overflow:hidden; padding:3px; font-family:微软雅黑; font-size:12px; min-width:15px; text-align:center; cursor:pointer; height:20px; line-height:20px;}
.pageList  a:hover,.pageList_Current{ background-color:#278DE1;}
.pageList a.pageList_Hidden{ border:none; cursor:default;}
.pageList a.pageList_Hidden:hover{ background-color:transparent;}
.pageList input.jumpNum{ width:30px; border:1px solid #8c8c8c; float:left; width:30px; height:20px; margin-left:5px; line-height:20px; padding:3px; text-align:center;}
.pageList a.jumpText{ border:none;background:none; outline:none; margin-left:0;}

$(function(){
$("#pagelist").pageList({ total: 1021, num: 10, size: 8,ajax:function(){
$.ajax({
type: "POST",
//dataType: "html",
url: "",
cache:false,
//data: { pageStar: pageStar, pageEnd: pageEnd },
error: function () { },
success: function (data) {//alert("这里的ajax可以正常执行");
}
});
} });
})

<div id="pagelist"></div>