HttpServletRequest request=ServletActionContext.getRequest();
HttpSession session=request.getSession();
CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
JFreeChart chart = ChartFactory.createBarChart3D(title,
        x,
        y,
        dataset,
        PlotOrientation.VERTICAL,
        true,
        true,
        false); 
CategoryPlot plot = chart.getCategoryPlot();

//设置字体，不然会中文乱码
Font font = new Font("宋体", Font.BOLD, 16); 
TextTitle title1 = new TextTitle(title, font);
chart.setTitle(title1); //标题
        
NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();
CategoryAxis domainAxis = plot.getDomainAxis();  
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));     /*------设置X轴坐标上的文字-------*/ 
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));       /*------设置X轴的标题文字------------*/  
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12)); /*------设置Y轴坐标上的文字-----------*/  
numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));      /*------设置Y轴的标题文字------------*/
chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));
        

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