jfreechart中文乱码问题解决方案

柱状图(CategoryPlot):   CategoryPlot plot=chart.getCategoryPlot();//获取图表区域对象   CategoryAxis domainAxis=plot.getDomainAxis();    //水平底部列表    domainAxis.setLabelFont(new Font("黑体",Font.BOLD,14));    //水平底部标题    domainAxis.setTickLabelFont(new Font("宋体",Font.BOLD,12));    //垂直标题    ValueAxis rangeAxis=plot.getRangeAxis();//获取柱状    rangeAxis.setLabelFont(new Font("黑体",Font.BOLD,15));     chart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15));饼图(PiePlot):     JFreeChart chart = ChartFactory.createPieChart3D("IT行业职业分布图", dataset, true, false, false);    chart.getTitle().setFont(new Font("黑体",Font.BOLD,20));//设置标题字体    PiePlot piePlot= (PiePlot) chart.getPlot();//获取图表区域对象    piePlot.setLabelFont(new Font("黑体",Font.BOLD,10));    chart.getLegend().setItemFont(new Font("黑体",Font.BOLD,10));时序图(TimeSeries)     XYPlot plot = (XYPlot) chart.getPlot();    //纵轴字体    plot.getRangeAxis().setLabelFont(new Font("宋体", Font.BOLD, 15));    //横轴框里的标题字体    chart.getLegend().setItemFont(new Font("宋体", Font.ITALIC, 15));    //横轴列表字体    plot.getDomainAxis().setTickLabelFont(new Font("新宋体", 1, 15));    //横轴小标题字体    plot.getDomainAxis().setLabelFont(new Font("新宋体", 1, 12));折线图chart.getTitle().setFont(new Font("宋体", Font.BOLD, 15));   chart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15));   CategoryAxis domainAxis = plot.getDomainAxis();      /*------设置X轴坐标上的文字-----------*/    domainAxis.setTickLabelFont(new Font("黑体", Font.PLAIN, 11));      /*------设置X轴的标题文字------------*/    domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));      NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();      /*------设置Y轴坐标上的文字-----------*/    numberaxis.setTickLabelFont(new Font("黑体", Font.PLAIN, 12));      /*------设置Y轴的标题文字------------*/    numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12))