分页 搜索后分页

分页js：page.js

function myPagination(_ref) {
    var pageSize = _ref.pageSize,
        pageTotal = _ref.pageTotal,
        curPage = _ref.curPage,
        id = _ref.id,
        getPage = _ref.getPage,
        showPageTotalFlag = _ref.showPageTotalFlag,
        showSkipInputFlag = _ref.showSkipInputFlag,
        pageAmount = _ref.pageAmount,
        dataTotal = _ref.dataTotal;

    this.pageSize = pageSize || 5; //分页个数
    this.pageTotal = pageTotal; //总共多少页
    this.pageAmount = pageAmount; //每页多少条
    this.dataTotal = dataTotal; //总共多少数据
    this.curPage = curPage || 1; //初始页码
    this.ul = document.createElement('ul');
    this.id = id;
    this.getPage = getPage;
    this.showPageTotalFlag = showPageTotalFlag || false; //是否显示数据统计
    this.showSkipInputFlag = showSkipInputFlag || false; //是否支持跳转
    this.init();
};

// 给实例对象添加公共属性和方法
myPagination.prototype = {
    init: function init() {
        var pagination = document.getElementById(this.id);
        pagination.innerHTML = '';
        this.ul.innerHTML = '';
        pagination.appendChild(this.ul);
        var that = this;
        //首页
        that.firstPage();
        //上一页
        that.lastPage();
        //分页
        that.getPages().forEach(function (item) {
            var li = document.createElement('li');

            if (item == that.curPage) {
                // alert(item+"是否等于，初次"+that.curPage)
                li.className = 'active';
            } else {
                li.onclick = function () {
                    that.curPage = parseInt(this.innerHTML);
                    that.init();
                    that.getPage(that.curPage);
                };
            }
            li.innerHTML = item;
            that.ul.appendChild(li);
        });
        //下一页
        that.nextPage();
        //尾页
        that.finalPage();

        //是否支持跳转
        if (that.showSkipInputFlag) {
            that.showSkipInput();
        }
        //是否显示总页数,每页个数,数据
        if (that.showPageTotalFlag) {
            that.showPageTotal();
        }
    },
    //首页
    firstPage: function firstPage() {
        var that = this;
        var li = document.createElement('li');
        li.innerHTML = '首页';
        if(parseInt(that.curPage) > 1){
            li.onclick = function () {
            var val = parseInt(1);
            that.curPage = val;
            that.getPage(that.curPage);
            that.init();
            //首页，默认 为 0 ，每页10 
            selectInfPage(0, pageSize);
        };
        }
        else {
            li.className = 'disabled';
        }
        this.ul.appendChild(li);
       
    },
    //上一页
    lastPage: function lastPage() {
        var that = this;
        var li = document.createElement('li');
        li.innerHTML = '<';
        if (parseInt(that.curPage) > 1) {
            li.onclick = function () {
                that.curPage = parseInt(that.curPage) - 1;
                that.init();
                that.getPage(that.curPage);
                up_page = that.curPage;
                //异步请求
                selectInfPage(up_page, pageSize);
                //console.log("上一页是第" + up_page + '页');

            };
        } else {
            li.className = 'disabled';
        }
        this.ul.appendChild(li);
    },
    //分页
    getPages: function getPages() {
        var pag = [];
        if (this.curPage <= this.pageTotal) {
            if (this.curPage < this.pageSize) {
                //当前页数小于显示条数
                var i = Math.min(this.pageSize, this.pageTotal);
                while (i) {
                    pag.unshift(i--);
                }
            } else {
                //当前页数大于显示条数
                var middle = this.curPage - Math.floor(this.pageSize / 2),
                    //从哪里开始
                    i = this.pageSize;
                if (middle > this.pageTotal - this.pageSize) {
                    middle = this.pageTotal - this.pageSize + 1;
                }
                while (i--) {
                    pag.push(middle++);
                }
            }
        } else {
            console.error('当前页数不能大于总页数');
        }
        if (!this.pageSize) {
            console.error('显示页数不能为空或者0');
        }
        return pag;
    },
    //下一页
    nextPage: function nextPage() {

        var that = this;
        var li = document.createElement('li');
        li.innerHTML = '>';
        if (parseInt(that.curPage) < parseInt(that.pageTotal)) {
            li.onclick = function () {
                that.curPage = parseInt(that.curPage) + 1;
                that.init();
                that.getPage(that.curPage);
                next_page = that.curPage;
                //异步请求
                selectInfPage(next_page, pageSize);
                console.log("下一页是第" + next_page + '页');

            };
        } else {
            li.className = 'disabled';
        }
        this.ul.appendChild(li);
    },
    //尾页
    finalPage: function finalPage() {
        var that = this;
        var li = document.createElement('li');
        li.innerHTML = '尾页';
        //给出判断，若当前页是最后一页，则尾页按钮不可点击
        if (parseInt(that.curPage) != parseInt(that.pageTotal)) {
            li.onclick = function () {
                var yyfinalPage = that.pageTotal;
                var val = parseInt(yyfinalPage);
                that.curPage = val;
                that.getPage(that.curPage);
                that.init();
                lastpage_num = that.curPage;
                selectInfPage(lastpage_num, pageSize);
                //console.log("最后一页是" + lastpage_num);
            };

        } else {
            li.className = 'disabled';
        }
        this.ul.appendChild(li);
    },
    //是否支持跳转
    showSkipInput: function showSkipInput() {
        var that = this;
        var li = document.createElement('li');
        li.className = 'totalPage';
        var span1 = document.createElement('span');
        span1.innerHTML = '跳转到';
        li.appendChild(span1);
        var input = document.createElement('input');
        input.setAttribute("type", "number");
        input.onkeydown = function (e) {
            var oEvent = e || event;
            if (oEvent.keyCode == '13') {
                var val = parseInt(oEvent.target.value);
                if (typeof val === 'number' && val <= that.pageTotal && val > 0) {
                    that.curPage = val;
                    that.getPage(that.curPage);
                    //异步请求
                    selectInfPage(val, pageSize);
                } else if (val < 1) {
                    alert("跳转页数不能小于1!")
                } else {
                    alert("跳转页数不能大于总页数!")
                }
                that.init();
            }
        };
        li.appendChild(input);
        var span2 = document.createElement('span');
        span2.innerHTML = '页';
        li.appendChild(span2);
        this.ul.appendChild(li);
    },
    //是否显示总页数,每页个数,数据
    showPageTotal: function showPageTotal() {
        var that = this;
        var li = document.createElement('li');
        li.innerHTML = '共&nbsp' + that.pageTotal + '&nbsp页';
        li.className = 'totalPage';
        this.ul.appendChild(li);
        var li2 = document.createElement('li');
        li2.innerHTML = '每页&nbsp' + that.pageAmount + '&nbsp条';
        li2.className = 'totalPage';
        this.ul.appendChild(li2);
        var li3 = document.createElement('li');
        li3.innerHTML = '合计&nbsp' + that.dataTotal + '&nbsp条数据';
        li3.className = 'totalPage';
        this.ul.appendChild(li3);
    }
};

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