jQuery教程分页插件实现详解-职坐标

jQuery教程分页插件实现详解

沉沙 2018-09-20 来源：阅读 1251 评论 0

摘要：本篇教程介绍了jQuery教程分页插件实现详解，希望阅读本篇文章以后大家有所收获，帮助大家对jQuery的理解更加深入。

本篇教程介绍了jQuery教程分页插件实现详解，希望阅读本篇文章以后大家有所收获，帮助大家对jQuery的理解更加深入。

1、paging.js

var tableStyle =
    ".page {font-size: 14px;background-color: transparent;width: 100%;height: 50px;line-height: 50px;display: none;-webkit-user-select:none;-moz-user-select:none; -ms-user-select:none;user-select:none;}"+
    ".page .page-l select {width: 60px;height: 30px;}"+
    ".page .page-l .page-size-box {display: inline-block;margin-left: 20px;}"+
    ".page .page-r {float: right;padding-top: 10px;}"+
    ".page .page-r ul {float: left;list-style: none;margin: 0;height: 30px;box-sizing: border-box;padding: 0;}"+
    ".page .page-r ul li {float: left;list-style: none;height: 100%;line-height: 30px;border: 1px solid #ccc;box-sizing: border-box;margin:0 2px;}"+
    ".page .page-r ul li.active {background-color:#50aaff;border:1px solid #50aaff;}"+
    ".page .page-r ul li.active a:hover {background-color:#50aaff;}"+
    ".page .page-r ul li.active a {color: #fff;}"+
    ".page .page-r ul li a:hover {background-color: #f5f2f2;}"+
    ".page .page-r ul li:last-child {border-right: 1px solid #ccc;}"+
    ".page .page-r ul li a {text-decoration: none;display: block;height: 100%;color: #777;text-align:center;cursor:pointer;}"+
    ".page .page-r ul li.p1 a,.page .page-r ul li.p2 a,.page .page-r ul li.p3 a {width:30px;}"+
    ".page .page-r ul li.p4 a {width:40px;}"+
    ".page .page-r ul li.p5 a {width:50px;}"+
    ".page .page-r ul li.p6 a {width:60px;}"+
    ".page .page-r ul li a.active {background-color: #09aeb0;color: #fff;}"+
    ".page .page-r ul li a.ellipsis {cursor: not-allowed;}";

var styleNode = document.createElement('style');
styleNode.innerHTML = tableStyle;
var headNode = document.getElementsByTagName('head')[0];
headNode.appendChild(styleNode);

function Paging(paramsObj, callback) {
    this.pageSize = paramsObj.pageSize || 10;    //每页条数（不设置时，默认为10
    this.pageIndex = paramsObj.pageIndex || 1;    //当前页码
    this.totalCount = paramsObj.totalCount || 0;   //总记录数
    this.totalPage = Math.ceil(paramsObj.totalCount / paramsObj.pageSize) || 0;     //总页数
    this.prevPage = paramsObj.prevPage || '<';     //上一页（不设置时，默认为：<）
    this.nextPage = paramsObj.nextPage || '>';     //下一页（不设置时，默认为：>）
    this.degeCount = paramsObj.degeCount || 3;             //当前页前后两边可显示的页码个数（不设置时，默认为3）
    this.ellipsis = paramsObj.ellipsis; //是否显示省略号不可点击按钮（true：显示，false：不显示）
    this.ellipsisBtn = (paramsObj.ellipsis == true || paramsObj.ellipsis == null) ? '<li class="p1"><a class="ellipsis">…</a></li>' : '';
    var that = this;

    $('#page_size').val(this.pageSize);
    callback && callback(this.pageIndex, this.pageSize);    //立即执行回调函数

    // 生成分页DOM结构
    this.initPage = function (totalCount, totalPage, pageIndex) {
        this.totalCount = totalCount;
        this.totalPage = totalPage;
        this.pageIndex = pageIndex;
        var degeCount = this.degeCount;
        var pageHtml = '';  //总的DOM结构
        var tmpHtmlPrev = '';   //省略号按钮前面的DOM
        var tmpHtmlNext = '';   //省略号按钮后面的DOM
        var headHtml = ''; //首页和上一页按钮的DOM
        var endHtml = '';   //末页和下一页按钮的DOM

        var ellipsisBtn = this.ellipsisBtn;
        pageIndex = pageIndex - 0;
        var firstPage = '<li class="p1"><a class="page-number" href="javascript:;">1</a></li>';
        var lastPageCla = 'p'+(this.totalPage+'').length;
        var lastPage = '<li class="'+lastPageCla+'"><a class="page-number" href="javascript:;">'+this.totalPage+'</a></li>';
        var tmpHtmlPrev = '<li class="p1"><a id="prev_page" class="p1">'+this.prevPage+'</a></li>';
        var tmpHtmlNext = '<li class="p1"><a id="next_page" class="p1">'+this.nextPage+'</a></li>';
        var countPage = '';

        //左侧不需要省略号按钮，右侧不需要省略号按钮
        if(pageIndex <= (degeCount+2) && (pageIndex+degeCount) >= (totalPage-1)){
            for(var i=1; i<=totalPage; i++){
                var len = (i+'').length;
                if(i == pageIndex) {
                    countPage += '<li class="active p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }else{
                    countPage += '<li class="p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }
            }
            pageHtml = tmpHtmlPrev + countPage + tmpHtmlNext;
        }
        //左侧不需要省略号按钮，右侧需要省略号按钮
        if(pageIndex <= (degeCount+2) && (pageIndex+degeCount) < (totalPage-1)){
            for(var i=1; i<=(degeCount*2+2); i++){
                var len = (i+'').length;
                if(i == pageIndex) {
                    countPage += '<li class="active p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }else{
                    countPage += '<li class="p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }
            }
            if(degeCount*2+2 < totalPage) {
                pageHtml = tmpHtmlPrev + countPage + ellipsisBtn + lastPage + tmpHtmlNext;
            }else{
                pageHtml = tmpHtmlPrev + countPage + tmpHtmlNext;
            }
        }
        //左侧需要省略号按钮，右侧需要省略号按钮
        if(pageIndex > (degeCount+2) && (pageIndex+degeCount) < (totalPage-1)){
            for(var i=pageIndex-degeCount; i<=pageIndex+degeCount; i++){
                var len = (i+'').length;
                if(i == pageIndex) {
                    countPage += '<li class="active p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }else{
                    countPage += '<li class="p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }
            }
            pageHtml = tmpHtmlPrev + firstPage + ellipsisBtn + countPage + ellipsisBtn + lastPage + tmpHtmlNext;
        }
        //左侧需要省略号按钮，右侧不需要省略号按钮
        if(pageIndex > (degeCount+2) && (pageIndex+degeCount) >= (totalPage-1)){
            for(var i=(totalPage-degeCount*2-1); i<=totalPage; i++){
                var len = (i+'').length;
                if(i == pageIndex) {
                    countPage += '<li class="active p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }else{
                    countPage += '<li class="p'+len+'"><a class="page-number" href="javascript:;">'+i+'</a></li>';
                }
            }
            if(totalPage-degeCount*2-1 > 1){
                pageHtml = tmpHtmlPrev + firstPage + ellipsisBtn + countPage + tmpHtmlNext;
            }else{
                pageHtml = tmpHtmlPrev + countPage + tmpHtmlNext;
            }
        }

        $('#page_ul').html(pageHtml);
        $('#total_count').html(totalCount);
        if(pageIndex == 1) {
            $('#page_ul').find('#prev_page').css('cursor', 'not-allowed');
        }
        if(pageIndex == totalPage){
            $('#page_ul').find('#next_page').css('cursor', 'not-allowed');
        }
    };

    // 点击页码（首页、上一页、下一页、末页、数字页）
    $('#page_ul').on('click','a',function (e) {
        var _this = $(this);
        var idAttr = _this.attr('id');
        var className = _this.attr('class');
        if(idAttr == 'prev_page' && that.pageIndex > 1){    //如果点击的是上一页
            that.pageIndex = that.pageIndex - 1 ;
            callback && callback(that.pageIndex, that.pageSize);
        }else if(idAttr == 'next_page' && that.pageIndex < that.totalPage){ //如果点击的是下一页
            that.pageIndex = parseInt(that.pageIndex) + 1;
            callback && callback(that.pageIndex, that.pageSize);
        }else if(className == 'page-number'){   //如果点击的是数字页码
            that.pageIndex = _this.html();
            callback && callback(that.pageIndex, that.pageSize);
        }

    });

    // 改变每页条数
    $('#page_size').change(function () {
        var _this = $(this);
        that.pageIndex = paramsObj.pageIndex = 1;
        that.pageSize = paramsObj.pageSize = _this.val() - 0;
        callback && callback(that.pageIndex, that.pageSize);
    })
}

2、index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js版分页插件</title>
    <style>
        .data {
            width: 70%;
            margin: 0 auto;
        }
        .params {
            margin: 20px 0;
        }
        .params input {
            height: 30px;
            box-sizing: border-box;
        }
        .params .search-btn {
            float: right;
            width: 80px;
            border: 0 none;
            background-color: #666;
            color: #fff;
            font-size: 14px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            text-align: center;
        }
        th, td {
            border: 1px solid #999;
            height: 26px;
            line-height: 26px;
        }
        .no-data {
            display: none;
            height: 80px;
            line-height: 80px;
            text-align: center;
            color: #aaa;
        }
    </style>
</head>
<body>
    <div class="data">
        <div class="params">
            <label for="course_id">用户姓名：</label><input type="text" id="user_name">
            <input type="button" value="查询" class="search-btn" id="search_btn">
        </div>
        <table>
            <thead>
                <tr>
                    <th>序号</th>
                    <th>用户ID</th>
                    <th>姓名</th>
                    <th>创建时间</th>
                </tr>
            </thead>
            <tbody id="data_list"></tbody>
        </table>
        <div class="no-data">未查询到数据</div>

        
        <div class="page">
            <div class="page-l" id="page_l" style="float: left;">
                <span>总共 <span id="total_count"></span> 条</span>
                <div class="page-size-box">
                    <span>每页显示</span>
                    <select id="page_size">
                        <option value="10">10</option>
                        <option value="20">20</option>
                        <option value="50">50</option>
                        <option value="100">100</option>
                    </select>条
                </div>
            </div>
            <div class="page-r">
                <ul id="page_ul" class="page-ul"></ul>
            </div>
        </div>
    </div>

    <script src="jquery.min.js"></script>
    <script src="paging.js"></script>
    <script>
        $(function () {

            //分页参数（参数名固定不可变）
            var pageConfig = {
                pageSize: 10,                //每页条数（不设置时，默认为10）
                prevPage: '<',             //上一页（不设置时，默认为：<）
                nextPage: '>',             //下一页（不设置时，默认为：>）
                degeCount: 2,                //当前页前后两边可显示的页码个数（不设置时，默认为3）
                ellipsis: true               //是否显示省略号按钮(不可点击)（true:显示，false:不显示，不设置时，默认为显示）
            }
            getList();  //初始加载就查询

            //点击查询按钮
            $('#search_btn').click(function () {
                getList();
            })

            //查询列表数据
            function getList() {
                //初始化Paging实例(pageConfig参数也可以为空对象，此时就是默认设置)
                var pageIng = new Paging(pageConfig, function (pageIndex, pageSize) {
                    var userName = $('#user_name').val();
                    $.ajax({
                        url:'//172.16.4.133:8081/ssm_project/sysUser/getSysUserList.do', //这里就不显示接口地址
                        type:'get',
                        data:{
                            pageIndex: pageIndex,
                            pageSize: pageSize,
                            name: userName
                        },
                        success: function (res) {
                            if(res.success == 1){
                                if(res.data.length > 0){  //如果查询到了数据
                                    var dataList = res.data;
                                    var html = '';
                                    dataList.forEach(function (item, i) {
                                        html += '<tr>'+
                                                    '<td style="width: 20%;">'+((pageIndex-1)*pageSize+i+1)+'</td>'+
                                                    '<td style="width: 20%;">'+item.id+'</td>'+
                                                    '<td style="width: 30%;">'+item.name+'</td>'+
                                                    '<td style="width: 30%;">'+item.createTime+'</td>'+
                                                '</tr>';
                                    });
                                    $('#data_list').html(html);
                                    var totalCount = res.totalCount;   //接口返回的总条数
                                    var totalPage = Math.ceil(totalCount / pageSize);   //根据总条数和每页条数计算总页码数

                                    // 调用Paging实例的 initPage()方法生成分页DOM结构
                                    pageIng.initPage(totalCount, totalPage, pageIndex);
                                    $('.page').show();
                                    $('.no-data').hide();
                                }else{  //如果未查询到数据
                                    $('#data_list').html('');
                                    $('.page').hide();
                                    $('.no-data').show();
                                }
                            }else{
                                $('#data_list').html('');
                                $('.page').hide();
                                $('.no-data').show();
                            }
                        }
                    })
                });
            }
        })
    </script>
</body>
</html>