操作：http://localhost/test/zimg.html
效果：
===============zimg.html代码===============
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>异步加载统计图组件（jquery）</title> </head> <script type="text/javascript" src="http://code.jquery.com/jquery-1.6.3.min.js"></script> <script language="javascript"> jQuery(function(){ var i = 0;//起始索引 var o = $(".images");//统计图对象 var l = o.length;//统计图的数量 var options = new Object;//统计图参数 odrImage(i);//执行 function odrImage(i){ var oi = o.eq(i); if(i<l){ $.get("data.php",{"oid":oi.attr("oid")},function(data){//异步加载 if(data){ //options.maxval = 1000;//纵轴最大值，默认是自动算 options.title = "城市消费统计图-"+i; //标题 options.datas = jQuery.parseJSON(data);//数据 oi.empty().zImage(options); odrImage(++i) } }) } return false; } }) </script> <body> <div class="images" oid="258" ></div> <div class="images" oid="257"></div> <div class="images" oid="253"></div> </body> </html> <script language="javascript"> //统计图组件 (function($){ $.fn.zImage = function(options){ if(!(options instanceof Object)){alert("参数是个对象");return false;} var title = 'title' in options ? options.title : "标题"; var datas = options.hasOwnProperty('datas') ? options.datas : []; var total = $.itotal(datas);//总数 var length = total.length;//数组长度 var datas = total.data;//数据 var tags = total.tag;//标签 var hrefs = total.href;//连接 var colors = total.color;//颜色 //============画布 var canvas = new Object(); var cW = 430;//画布的宽 var cH = 250;//画布的高 var canvasStyle; //默认样式 if('canvas' in options){ cW = options.canvas.width ? parseInt(options.canvas.width) : cW; cH = options.canvas.height ? parseInt(options.canvas.height) : cH; canvasStyle = options.canvas } canvas.defaults = {cW+"px",height:cH+"px",background:"#FFFFFF",position:"relative"}; var opts = $.extend(canvas.defaults,canvasStyle); this.css(opts); //===========标题 var tH = 30;//标题的高 var tT = 20;//向上偏移量 var titleT = $("<div>").css({"position":"relative","text-align":"center","height":tH+"px","font-size":"24px","font-weight":"bold","top":tT+"px"}).text(title); this.append(titleT); //===========X轴网格 var lineX;//X轴网格线 var tagX;//x轴tag var lxB;//每个网格的下偏移量 var xB = 30;//下偏移量 var xL = 50;//左偏移量 var lxS = 'numx' in options ? options.numx :6;//网格的数量 var txW = 'xw' in options ? options.xw :20;//调节网格间隔基数 var lxW = (cH-tH-tT-xB-20)/lxS;//网格间隔 var xW = cW-xL-5;//x轴的长度 var showSize;//Y轴显示的最大值 if('maxval' in options){ showSize = options.maxval; }else{//自动判断Y轴的最大值 showSize = total.mval; var sl = String(showSize).length; var sj = new Array(sl).join("0"); var sc = parseInt("1"+sj); var ss; for(var f=1;f<100;f++){ ss = f*sc*lxS; if(ss > showSize){ showSize = ss; break; } } } var tD = showSize/lxS;//y轴上显示的基数 var bg; for(var i=0;i<=lxS;i++){ lxB = (i * lxW)+xB; tagD = Math.round(i*tD); bg = i==0 ? "#000000":"#CCCCCC"; lineX = $("<div>").css({xW+"px",height:"1px",left:xL+"px",background:bg,position:"absolute",bottom:lxB+"px","font-size":"0px","overflow":"hidden"}); tagX = $("<div>").css({position:"absolute",bottom:lxB+"px",right:(xW+8)+"px","font-size":".8em","color":"#333333","line-height":".8em"}).text(tagD); this.append(lineX).append(tagX); } //===========Y轴网格 var lineY;//Y轴网格线 var tagY;//Y轴tag var sizeY;//数据上显示的数值 var sizeHref;//数值上的链接 var lyL;//每个网格的左偏移量 var yH = lxW*lxS;//y轴的高 var yL = 50;//左偏移量 var lyS = length;//网格数量 var lyW = (cW-xL-10)/lyS;//网格间隔 var tdW = 'dw' in options ?options.dw : 20;//调节数据宽度基数 var dW = (lyW-tdW)>0 ? (lyW-tdW-10) : lyW-10;//数据宽度 var yB = xB;//y轴下偏移量 var dH;//数据的高度 var dC;//数据的颜色 for(var i=0;i<=lyS;i++){ lyL = (i * lyW)+yL; bg=i==0?"#000000":"#CCCCCC"; if(i>0){ dH = Math.round(datas[i]*lxW/tD); dC = colors[i]? colors[i] : "#FF6600"; dataY = $("<div>").css({dW+"px",height:dH+"px",background:dC,position:"absolute",left:(lyL-(dW+lyW)/2)+"px",bottom:yB+"px","font-size":"0px","overflow":"hidden"}); tagY = $("<div>").css({position:"absolute",left:(lyL-lyW)+"px",bottom:(yB-20)+"px","text-align":"center",lyW+"px","font-size":".8em","color":"#333333"}).text(tags[i]); sizeHref = $("<a>").attr({"target":"_blank","href":hrefs[i],'title':tags[i]}).text(datas[i]).css({"text-decoration":"none","color":"#0099CC","font-size":".8em"}).hover(function (){$(this).css("color","#FF0000");},function (){$(this).css("color","#0099CC");}); sizeY = $("<div>").css({position:"absolute",left:(lyL-lyW)+"px",bottom:(yB+dH+5)+"px","text-align":"center",lyW+"px"}).html(sizeHref); this.append(tagY).append(dataY).append(sizeY); } lineY = $("<div>").css({"1px",height:yH+"px",background:bg,position:"absolute",left:lyL+"px",bottom:yB+"px"}); this.append(lineY); } } //计算数据总值 $.itotal = function(array){ var length = 0; var color = [0]; var href =[0]; var tag = [0]; var data = [0]; var mval = 0; var dt = 0; $.each(array,function(k,v){ length++; dt = parseInt(v['data']); mval = mval > dt ? mval:dt; data.push(dt); href.push(v['href']); color.push(v['color']); tag.push(k); }) //console.log(data); return {"mval":mval,"length":length,"data":data,"tag":tag,"href":href,"color":color}; } //取最大值 $.maxval = function(array){ var sarray = array.sort(function(a, b){return b-a;}); return sarray[0]; } })(jQuery) </script>
===============data.php数据===============
header( 'Content-type: text/html;charset=utf-8' );//设置页面编码 //图一 $cy["258"]["北京"] = array("data"=>500,"href"=>"http://www.baidu.com/s?wd=北京","color"=>"#FF0000"); $cy["258"]["上海"] = array("data"=>800,"href"=>"http://www.baidu.com/s?wd=上海","color"=>"#00FF00"); $cy["258"]["深圳"] = array("data"=>700,"href"=>"http://www.baidu.com/s?wd=深圳","color"=>"#0000FF"); //图二 $cy["257"]["北京"] = array("data"=>500,"href"=>"http://www.baidu.com/s?wd=北京","color"=>"#FF0000"); $cy["257"]["深圳"] = array("data"=>700,"href"=>"http://www.baidu.com/s?wd=深圳","color"=>"#0000FF"); $cy["257"]["天津"] = array("data"=>300,"href"=>"http://www.baidu.com/s?wd=天津","color"=>"#FFFF00"); //图三 $cy["253"]["北京"] = array("data"=>500,"href"=>"http://www.baidu.com/s?wd=北京","color"=>"#FF0000"); $cy["253"]["上海"] = array("data"=>800,"href"=>"http://www.baidu.com/s?wd=上海","color"=>"#00FF00"); $cy["253"]["深圳"] = array("data"=>700,"href"=>"http://www.baidu.com/s?wd=深圳","color"=>"#0000FF"); $cy["253"]["天津"] = array("data"=>300,"href"=>"http://www.baidu.com/s?wd=天津","color"=>"#FFFF00"); if($ct = $cy[$_GET["oid"]]){echo json_encode($ct);} sleep(1);