jQuery制作简单柱状图实例

时间：2022-09-21 11:49:44

本文实例讲述了jQuery制作简单柱状图的方法。分享给大家供大家参考。具体实现方法如下：

Html部分：

 

复制代码 代码如下:
<head> 
<title>柱状图</title> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<link href="css.css" type="text/css" rel="stylesheet" /> 
<script src="jquery-1.8.2.min.js" type="text/javascript"></script> 
<script src="histogram.js" type="text/javascript"></script> 
</head> 
<body> 
<div class="histogram-container" id="histogram-container"></div> 
</body>

 

CSS部分：

复制代码 代码如下:
/*以下为柱状图样式*/ 
.histogram-container{position:relative;margin-left:60px;margin-top:10px;margin-bottom:25px;} 
.histogram-bg-line{border:#999 solid;border-width:0 0px 1px 1px;border-right-color:#eee;overflow:hidden;width:99%;} 
.histogram-bg-line ul{overflow:hidden;border:#eee solid;border-width:1px 0 0 0;clear:both;} 
.histogram-bg-line li{float:left;overflow:hidden;background:#fff;} 
.histogram-bg-line li div{border-right:1px #eee solid;} 
.histogram-content{position:absolute;left:0px;top:0;width:99%;height:100%;} 
.histogram-content ul{height:100%;} 
.histogram-content li{float:left;height:100%;text-align:center;position:relative;} 
.histogram-box{position:relative;display:inline-block;height:100%;width:20px;} 
.histogram-content li a{position:absolute;bottom:0;right:0;display:block;width:20px;font-size:0;line-height:0;} 
.histogram-content li .histogram-name{position:absolute;bottom:-20px;left:0px;white-space:nowrap;display:inline-block;width:100%;font-size:12px;overflow:hidden;} 
.histogram-y{position:absolute;left:-60px;top:-10px;font:12px/1.8 verdana,arial;} 
.histogram-y li{text-align:right;width:55px;padding-right:5px;color:#333;} 
.histogram-bg-line li div,.histogram-y li{height:30px;/*控制单元格的高度及百分比的高度，使百分数与线条对其*/}

 

Js部分：

复制代码 代码如下:

$(function(){ 
var dataArr={ 
    "data":[ 
        {"id":1,"name":"百度","per":"10"}, 
        {"id":2,"name":"腾讯","per":"20"}, 
        {"id":3,"name":"新浪","per":"10"}, 
        {"id":4,"name":"网易","per":"44"}, 
        {"id":5,"name":"搜狐","per":"50"}, 
        {"id":5,"name":"小虾虎鱼","per":"69"}, 
        {"id":5,"name":"人人网","per":"72"}, 
        {"id":5,"name":"爱奇艺","per":"88"}, 
        {"id":5,"name":"奇虎360","per":"92"}, 
        {"id":5,"name":"阿里巴巴","per":"15"}, 
        {"id":5,"name":"阿里巴巴","per":"10"} 
    ] 
}; 
new histogram().init(dataArr.data); 
}); 
 
function histogram(){ 
    var controls={}; 
    var bgColor=new Array("#666666","#21AA7C","#2277BB","#dc7644","#BBAA22","#AA22AA","#338800","#1099EE","#ffcc33","#ED3810"); 
    this.init=function(data,y){ 
        setControls(); 
        buildHtml(data,y); 
    } 
    function setControls(){ 
        controls.histogramContainer=$("#histogram-container"); 
        controls.histogramBgLineUL=controls.histogramContainer.children("div.histogram-bg-line"); 
        controls.histogramContentUL=controls.histogramContainer.children("div.histogram-content"); 
        controls.histogramY=controls.histogramContainer.children("div.histogram-y"); 
    } 
    function buildHtml(data,y){ 
        var len=data.length,perArr=new Array(),maxNum,maxTotal,yStr=''; 
        var contentStr='',bgLineStr='',bgLineAll=''; 
        var widthPer=Math.floor(100/len); 
        minWidth=len*21+60; 
        controls.histogramContainer.css("min-width",minWidth+"px"); 
         
        for(var a=0;a<len;a++){ 
            perArr[a]=parseInt(data[a]['per']);      
        } 
        maxNum=String(perArr.max()); 
        if(maxNum.length>2){ 
            var x=parseInt(maxNum.substr(maxNum.length-2,1))+1; 
            maxTotal=Math.floor(parseInt(maxNum/100))*100+x*10; 
        }else{ 
            maxTotal=Math.floor(parseInt(maxNum/10))*10+10; 
        } 
         
        //y轴部分 
        if(y=="%"){ 
            yStr+='<li>100%</li><li>80%</li><li>60%</li><li>40%</li><li>20%</li><li>0%</li>';            
        }else{ 
            var avg=maxTotal/5; 
            for(i=5;i>=0;i--){ 
                yStr+='<li>'+avg*i+'</li>'; 
            } 
        } 
         
        //柱状条部分 
        for(var i=0;i<len;i++){ 
            var per=Math.floor(parseInt(data[i]['per'])/maxTotal*100); 
            var n=Math.floor(parseInt(per)/10); 
            contentStr+='<li style="width:'+widthPer+'%">'; 
            contentStr+='<span class="histogram-box"><a style="height:'+per+'%'+';background:'+bgColor[n]+';" title="'+data[i]['per']+'"></a></span><span class="histogram-name">'+data[i]['name']+'</span>'; 
            contentStr+='</li>'; 
            bgLineStr+='<li style="width:'+widthPer+'%;"><div></div></li>'; 
        } 
         
        //背景方格部分 
        for(var j=0;j<5;j++){ 
            bgLineAll+='<ul>'+bgLineStr+'</ul>'; 
        } 
        bgLineAll='<div class="histogram-bg-line">'+bgLineAll+'</div>'; 
        contentStr='<div class="histogram-content"><ul>'+contentStr+'</ul></div>'; 
        yStr='<div class="histogram-y"><ul>'+yStr+'</ul></div>'; 
        controls.histogramContainer.html(bgLineAll+contentStr+yStr); 
        controls.histogramContainer.css("height",controls.histogramContainer.height()+"px");//主要是解决IE6中的问题       
    } 
} 
Array.prototype.max = function(){//最大值 
 return Math.max.apply({},this)  
}

 

希望本文所述对大家的jQuery程序设计有所帮助。

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