复杂了一点点,其实可以做很多简化跟优化的.自己用的跟你的完全不同,没有jquery,同样是ajax,分页只用到两个函数,一个是fy,一个是send_to_search,send_to_search是点击后查询分页数据 function fy(L,l,All,s_r,page,tj,id)//L分页长度,l是每页数量,All是总量,s_r是输入的页数,后面的可有可无,比较粗糙还没优化好 { s_r=Math.floor(s_r); var min = 0; var max = 0; var D = 0;
var pagecount = (All % l == 0) ? (All / l) : (Math.floor(All / l) + 1);//页数 var L_C =(L % 2 == 0) ? (L / 2) : (Math.floor(L / 2) + 1);//页码居中 if (s_r <= 0 || s_r > pagecount)//第一种情况:输入数不在有效的页数内,所以把它定位到第一页 { min = 1; D = 1; max = (pagecount > L) ? L : pagecount;
} else { if (pagecount <= L)//第二种情况:当总页数小于页码长度时 { min = 1; D = s_r; max = pagecount; } else { if (s_r <= L_C)//第三种情况: { min = 1; D = s_r; max = L; } else { if ((pagecount - s_r)<= L_C)//第四种情况: { min = pagecount - L + 1; D = s_r; max = pagecount; } else { min = s_r - L_C + 1; D = s_r; max =(L % 2 == 0) ? (s_r + L_C) : (s_r + L_C - 1); //alert(s_r +"___"+ L_C +"____"+ 1) //alert(min+"____"+max+"____"+D+"____"+s_r+"____"+L_C+"____"+L+"____"+pagecount) } } } } var a = ""; if (tj != null) { for(var c in tj) {
当然上面的说明也要附为readme.txt里最好了。
* 带页码的分页
* new PagerB({
recordCount:36,
pageContainer:"page",
funPageSearch:function(currentPage){
location="testPage.html?currentPage="+currentPage;
},
currentPage:1,
pageSize:10,
pageNum=12,
sync:false
});<br/>
* recordCount 总的记录数<br/>
* pageContainer容纳分页元素的id<br/>
* funPageSearch 回调的查询方法<br/>
* currentPage 当前页,默认为1<br/>
* pageSize 每页的记录数,默认10条<br/>
* pageNum 每页显示的页码数量,默认值=10,最小值亦为10<br/>
* sync 同步还是异步,默认为同步<br/>
* @author:yxd<br/>
* email:[email protected]
*
*/
function PagerB(pageInfo){
this.recordCount=pageInfo.recordCount;
this.pageSize=pageInfo.pageSize || 10;
this.pageContainer=$("#"+pageInfo.pageContainer);
this.funPageSearch=pageInfo.funPageSearch;
this.currentPage=pageInfo.currentPage || 1;
this.totalPage=this.calculateTotalPage();
this.pageNum=Math.max(pageInfo.pageNum || 10 , 10);
pageInfo.sync===false ? this.sync=false:this.sync=true;
this.htmlNumContainer=null;//页码的容器div
this.htmlFirstPage=null; //首页
this.htmlPrvPage=null; //上一页
this.htmlNextPage=null; //下一页
this.htmlLastPage=null; //尾页
this.htmlPageNumContainer=null; //页码集合的容器div
this.htmlPageNum=null; //所有页码的集合
this.htmlTotalRecord=null; //
this.htmlPageSize=null;
this.htmlTotalPage=null;
this.draw();
} PagerB.prototype={
draw:function(){
/*
*页码的显示形式为:
* <div id="pager">
* 共<span>300</span>行
* 每页<span>20</span>行
* 共<span>15</span>页
* <div class="a">
* <span class="unUse">首页</span>
* <span class="unUse">上一页</span>
* <div class="b">
* <span class="cur">1</span>
* <span class="use">2</span>
* <span class="use">3</span>
* </div>
* <span class="use">下一页</span>
* <span class="use">尾页</span>
* </div>
* </div>
*/
var that=this;
var pageHtml='共<span>'+this.recordCount+'</span>行 '
+'每页<span>'+this.pageSize+'</span>行 '
+'共<span>'+this.totalPage+'</span>页 '
+"<div class='a' style='display:none'>"
+"<span>首页</span> "
+"<span>上一页</span> "
+"<div class='b' style='display:inline'>"
+this.setPageNum()
+"</div>"
+" <span>下一页</span>"
+" <span>尾页</span>"
+"</div>";
this.pageContainer.append(pageHtml);
this.htmlTotalRecord=$("span:eq(0)",this.pageContainer);
this.htmlPageSize=$("span:eq(1)",this.pageContainer);
this.htmlTotalPage=$("span:eq(2)",this.pageContainer);
this.htmlNumContainer=$(".a",this.pageContainer);
this.htmlFirstPage=$(".a > span:eq(0)",this.pageContainer);
this.htmlPrvPage=$(".a > span:eq(1)",this.pageContainer);
this.htmlNextPage=$(".a > span:eq(2)",this.pageContainer);
this.htmlLastPage=$(".a > span:eq(3)",this.pageContainer);
this.htmlPageNumContainer=$(".b",this.htmlNumContainer);
this.htmlPageNum=$("span",this.htmlPageNumContainer);
this.htmlFirstPage.click(function(){
if(that.currentPage!=1){
that.currentPage=1;
that.gotoPage();
}
});
this.htmlPrvPage.click(function(){
if(that.currentPage!=1){
that.currentPage--;
that.gotoPage();
}
});
this.htmlNextPage.click(function(){
if(that.currentPage!=that.totalPage){
that.currentPage++;
that.gotoPage();
}
});
this.htmlLastPage.click(function(){
if(that.currentPage!=that.totalPage){
that.currentPage=that.totalPage;
that.gotoPage();
}
});
if(this.totalPage>1){
this.htmlNumContainer.css("display","inline");
this.setStyle();
}
},
setPageNum:function(){
//设置每页显示的页码,
//页码的显示取决与3个因素:
//1、每页显示的页码数量
//2、当前页
//3、总页数
var pageNumArray=[];
var firstNum=1,
lastNum=this.totalPage;
//当总页数>每页显示的页数时才需要额外的处理
if(this.totalPage>this.pageNum){
var halfNum=Math.floor(this.pageNum/2);
firstNum=this.currentPage-halfNum;
if(firstNum<=0){
firstNum=1;
}else{
var isTotalPage=false;
while((firstNum+this.pageNum)>(this.totalPage+1)){
isTotalPage=true;
firstNum--;
}
}
if(isTotalPage){
lastNum=this.totalPage;
}else{
lastNum=firstNum+this.pageNum-1;
}
}
for(var i=firstNum;i<=lastNum;i++){
pageNumArray.push("<span>"+i+"</span>");
}
return pageNumArray.join(" ");
},
setStyle:function(){//设置显示的样式
var that=this;
if(this.currentPage!=1){
this.htmlFirstPage.css({cursor:"pointer",color:""}).removeClass("unUse").addClass("use");
this.htmlPrvPage.css({cursor:"pointer",color:""}).removeClass("unUse").addClass("use");
}else{
this.htmlFirstPage.css({cursor:"",color:"grey"}).removeClass("use").addClass("unUse");
this.htmlPrvPage.css({cursor:"",color:"grey"}).removeClass("use").addClass("unUse");
}
if(this.currentPage!=this.totalPage){
this.htmlLastPage.css({cursor:"pointer",color:""}).removeClass("unUse").addClass("use");
this.htmlNextPage.css({cursor:"pointer",color:""}).removeClass("unUse").addClass("use");
}else{
this.htmlLastPage.css({cursor:"",color:"grey"}).removeClass("use").addClass("unUse");
this.htmlNextPage.css({cursor:"",color:"grey"}).removeClass("use").addClass("unUse");
}
this.htmlPageNum.each(function(){
var pageNum=Number($(this).html());
if(that.currentPage!=pageNum){
$(this).css({cursor:"pointer",
textDecoration:"underline"
})
.click(function(){
that.currentPage=pageNum;
that.gotoPage();
})
.mouseover(function(){
$(this).css("color","green");
})
.mouseout(function(){
$(this).css("color","");
}).removeClass("cur").addClass("use");
}else{
$(this).css("color","blue").removeClass("use").addClass("cur");
}
});
},
reDraw:function(_recordCount,_pageSize){
this.recordCount=_recordCount;
this.pageSize=_pageSize || this.pageSize;
this.currentPage=1;
this.totalPage=this.calculateTotalPage();
this.htmlTotalRecord.html(this.recordCount);
this.htmlPageSize.html(this.pageSize);
this.htmlTotalPage.html(this.totalPage);
if(this.totalPage>1){
this.htmlNumContainer.css("display","inline");
this.htmlPageNumContainer.html(this.setPageNum());
this.htmlPageNum=$("span",this.htmlPageNumContainer);
this.setStyle();
}else{
this.htmlNumContainer.css("display","none");
}
},
calculateTotalPage:function(){//计算总页数
return Math.floor((this.recordCount+this.pageSize-1)/this.pageSize);
},
gotoPage:function(){
if(!this.sync){//异步时,需要更新组件的外观
this.htmlPageNumContainer.html(this.setPageNum());
this.htmlPageNum=$("span",this.htmlPageNumContainer);
this.setStyle();
}
this.funPageSearch(this.currentPage);
}
};
最近因为项目的原因,把这个分页组件重构了下,现在的显示风格是类似百度的那种,对整个代码的结构也优化了,增加了几个亮点:
1、将参数对象化,这也是“javascript语言精粹”中提倡的,这样可以方便的处理默认参数。
2、通过传入参数显示的支持了页面时异步还是同步的,默认是同步的,即刷新的。
3、添加了和CSS的接口,组件本身已经完全实现了功能,并有基本的样式,但是通过CSS的接口,可以使得通过附加的外部样式来改变或者美化分页的显示效果。欢迎大家指正,在项目中使用后,同事都说不错,呵呵。
function fy(L,l,All,s_r,page,tj,id)//L分页长度,l是每页数量,All是总量,s_r是输入的页数,后面的可有可无,比较粗糙还没优化好
{
s_r=Math.floor(s_r);
var min = 0;
var max = 0;
var D = 0;
var pagecount = (All % l == 0) ? (All / l) : (Math.floor(All / l) + 1);//页数 var L_C =(L % 2 == 0) ? (L / 2) : (Math.floor(L / 2) + 1);//页码居中 if (s_r <= 0 || s_r > pagecount)//第一种情况:输入数不在有效的页数内,所以把它定位到第一页
{
min = 1;
D = 1;
max = (pagecount > L) ? L : pagecount;
}
else
{
if (pagecount <= L)//第二种情况:当总页数小于页码长度时
{
min = 1;
D = s_r;
max = pagecount;
}
else
{
if (s_r <= L_C)//第三种情况:
{
min = 1;
D = s_r;
max = L;
}
else
{
if ((pagecount - s_r)<= L_C)//第四种情况:
{
min = pagecount - L + 1;
D = s_r;
max = pagecount;
}
else
{
min = s_r - L_C + 1;
D = s_r;
max =(L % 2 == 0) ? (s_r + L_C) : (s_r + L_C - 1);
//alert(s_r +"___"+ L_C +"____"+ 1)
//alert(min+"____"+max+"____"+D+"____"+s_r+"____"+L_C+"____"+L+"____"+pagecount)
}
}
}
} var a = "";
if (tj != null)
{
for(var c in tj)
{
a += "&" + tj[c];
if(c==tj.length-1)
{
break;
}
}
}
var fy = ""; for (var kg = min; kg <= max; kg++)
{
//alert(D);
fy += (kg == D) ? "<span class=box>" + kg + "</span> " : " <span class=box2 onclick=\"send_to_search("+kg+","+id+")\" >" + kg + "</span> ";
}
var FY = "<span class=box2 onclick=\"send_to_search("+1+","+id+")\" >首页</span> <span class=box2 onclick=\"send_to_search("+(D == 1 ? 1 : (D - 1))+","+id+")\" >上一页</span> " + fy + " <span class=box2 onclick=\"send_to_search("+((D < max) ? (D == 1 ? 2 : (D + 1)) : ((max == 0 ? max + 1 : max)))+","+id+")\" >下一页</span> <span class=box2 onclick=\"send_to_search("+pagecount+","+id+")\" >尾页</span> <span>定位到第<input type=\"text\" class=\"box2\" value=\""+kg+"\" style=\"width:32px; height:20px;margin: 0px 0px 0px 0px;padding:0px 0px 0px 0px;text-align:center;\" />页</span><span class=box2 onclick=\"send_to_search("+pagecount+","+id+")\" >点击定位</span>";
//maxp=pagecount;
return FY;
}