调试了一天，终于把jqplot弄明白了，里面的一些样式属性等，制作出来的图表确实很漂亮，也很实用。
先看一下最终效果：
代码如下，以后有时间再把详细参数和配置方法写出来。
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<!--admin_analytics.jsp-->
<title>访问量统计</title>
<Meta http-equiv="pragma" content="no-cache">
<Meta http-equiv="cache-control" content="no-cache">
<Meta http-equiv="expires" content="0">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextpath }/admin/css/subcss.css">
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextpath }/admin/css/jquery.jqplot.min.css">
<style type="text/css"> /*注意选择器的层叠关系*/
.font {TEXT-ALIGN: center;COLOR: blue;FONT-SIZE: 16px; FONT-WEIGHT: bold;}
.buttonStyle{width:64px;height:22px;line-height:22px;color:#369;text-align:center;background:url(${pageContext.request.contextpath }/admin/js/images/buticon.gif) no-repeat left top;border:0;font-size:12px;}
.buttonStyle:hover{background:url(${pageContext.request.contextpath }/admin/js/images/buticon.gif) no-repeat left -23px;}
</style>
<script language="javascript" type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jquery-1.6.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jquery.jqplot.min.js"></script>
<!--[if lt IE 9]>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/excanvas.min.js"></script>
<![endif]-->
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.categoryAxisRenderer.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.canvasAxisTickRenderer.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.canvasTextRenderer.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.barRenderer.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.pointLabels.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.Highlighter.min.js"></script>
<!--script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/jqplot.json2.min.js"></script-->
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/My97DatePicker/WdatePicker.js"></script>
<script type="text/javascript" src="${pageContext.request.contextpath }/admin/js/zDialog.js"></script>
<script type="text/javascript" language="javascript">
var pageviewsJson ;
var visitsJson ;
var visitorsJson ;
var plot1;
function defquery(){
if($('#st').val() <= $('#et').val()){
$.ajax({
url :"${pageContext.request.contextpath }/servlet/AnalyticsPageviewsServlet",type : 'post',async:false,dataType:'json',data : 'st='+$('#st').val()+'&et='+$('#et').val(),success :function(mm){
pageviewsJson = mm;
}
});
$.ajax({
url :"${pageContext.request.contextpath }/servlet/AnalyticsVisitsServlet",success :function(mm){
visitsJson = mm;
}
});
$.ajax({
url :"${pageContext.request.contextpath }/servlet/AnalyticsVisitoRSServlet",success :function(mm){
visitorsJson = mm;
}
});
$('#chart').empty();
plot1 = $.jqplot('chart',[pageviewsJson,visitsJson,visitorsJson],{
title: '只统计外网访问量，不包含内网访问量',axesDefaults: {
tickRenderer: $.jqplot.CanvasAxisTickRenderer,tickOptions: {
angle: -40,fontSize: '10pt',fontFamily: 'Tahoma',fontWeight:'bold'
}
},seriesDefaults: {
showMarker:true,pointLabels: {
show: true,edgetolerance: 5
},markerOptions: {
show: true,// 是否在图中显示数据点
style: 'filledCircle' // 各个数据点在图中显示的方式，默认是"filledCircle"(实心圆点),}
},series:[
{label:'浏览量'},{label:'访问量'},{label:'访问人数'},{renderer:$.jqplot.CanvasAxisTickRenderer}
],legend: {
show: true,placement: 'outsideGrid',location: 'se'
},axes: {
xaxis: {
renderer: $.jqplot.CategoryAxisRenderer
}
},Highlighter: {
show: true,sizeAdjust: 7,showTooltip: true,tooltipSeparator: ': '
}
});
}//判断结束
else{
Dialog.alert("起始日期不能小于结束日期!");
}
};
</script>
</head>
<body onLoad="defquery()" style="margin-top:10px;" bgcolor="#ffffff" leftmargin="0" rightmargin="0" bottommargin="0" marginwidth="0" marginheight="0">
<div align="center">
<div class="title">外网访问量统计图<hr></div>
</div>
<div align="center" style="background-image:url(${pageContext.request.contextpath }/admin/images/bj3.jpg)">
<table border="0" cellpadding="0" cellspacing="0" width="744" id="table3">
<tr>
<td width="60%" height=20 align=center>
请选择时段：
<input readonly id="st" type="text" name="st" size="18" value="" maxlength="50">
<img onClick="WdatePicker({el:'st'})" src="${pageContext.request.contextpath }/admin/My97DatePicker/skin/datePicker.gif"width="16" height="22" align="middle">至
<input readonly id="et" type="text" name="et" size="18" value="" maxlength="50">
<img onClick="WdatePicker({el:'et'})" src="${pageContext.request.contextpath }/admin/My97DatePicker/skin/datePicker.gif"width="16" height="22" align="middle">
<input type="button" value="开始统计" name="B2" class="buttonStyle" onClick="defquery();">
</td>
</tr>
</table>
</div>
<div align="center">
<div id="chart" style="margin-top:2px; margin-left:20px; width:840px; height:460px;"></div>
</div>
</body>
</html>