width:800,

        height:600,

        El:'tb',

		title:'图表',

        closable:true, 

        plain:false,   

        buttonAlign:'center',

        collapsible:true,

	html : '<iframe name="main" scrolling="auto" frameborder="0" width="100%" height="100%" src="./jfreecharDemo/testJfreeCharDemo.jsp"></iframe>'

for(int i=0;i<list.size();i++){

				monthdata = (MonthData) list.get(i);

				dataset.addValue(monthdata.getRainfall(), "dd", String.valueOf(monthdata.getMonth()));

			}

			JFreeChart chart = ChartFactory.createBarChart3D("雨量统计图", 

	                  "监测点",

	                  "雨量",

	                  dataset,

	                  PlotOrientation.VERTICAL,

	                  false,

	                  false,

	                  false);

			CategoryPlot plot = chart.getCategoryPlot();// 获得图表区域对象

			   // 设置图表的纵轴和横轴org.jfree.chart.axis.CategoryAxis

			   CategoryAxis domainAxis = plot.getDomainAxis();

			   NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();

			  

			   //解决中文乱码问题

			   TextTitle textTitle = chart.getTitle();

			   textTitle.setFont(new Font("黑体", Font.PLAIN, 42));

			   domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));

			   domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 24));

			   numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));

			   numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 24));

			//   chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));

			//   domainAxis.setLowerMargin(0.1);// 设置距离图片左端距离此时为10%

			//   domainAxis.setUpperMargin(0.1);// 设置距离图片右端距离此时为百分之10

			//   domainAxis.setCategoryLabelPositionOffset(10);// 图表横轴与标签的距离(10像素)

			//   domainAxis.setCategoryMargin(0.2);// 横轴标签之间的距离20%

			   // domainAxis.setMaximumCategoryLabelLines(1);

			   // domainAxis.setMaximumCategoryLabelWidthRatio(0);



			String filename;

			try {

				filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, reques