JFreeChart中文乱码解决方案

由于JFreeChart组件的版本、操作平台、JDK的设置等因素，在使用JFreeChart组件时可能会出现中文乱码的现象。遇到此问题时，可通过设置文字的字体来解决问题。在此提供以下两种解决此问题的方法。

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由于JFreeChart组件的版本、操作平台、JDK的设置等因素，在使用JFreeChart组件时可能会出现中文乱码的现象。遇到此问题时，可通过设置文字的字体来解决问题。在此提供以下两种解决此问题的方法。

一、设置主题的样式（强烈推荐）

在制图前，创建主题样式并制定样式中的字体，通过ChartFactory的setChartTheme（）方法设置主题样式。

 //创建主题样式
   StandardChartTheme standardChartTheme=new StandardChartTheme("CN");
   //设置标题字体
   standardChartTheme.setExtraLargeFont(new Font("隶书",Font.BOLD,20));
   //设置图例的字体
   standardChartTheme.setRegularFont(new Font("宋书",Font.PLAIN,15));
   //设置轴向的字体
   standardChartTheme.setLargeFont(new Font("宋书",Font.PLAIN,15));
   //应用主题样式
   ChartFactory.setChartTheme(standardChartTheme);

例如：

 package com.zzs.jfreechart.demo;

 import java.awt.Font;
 import org.jfree.chart.ChartFactory;
 import org.jfree.chart.ChartFrame;
 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.StandardChartTheme;
 import org.jfree.chart.plot.PlotOrientation;
 import org.jfree.chart.title.LegendTitle;
 import org.jfree.chart.title.TextTitle;
 import org.jfree.data.category.DefaultCategoryDataset;

 public class JfreeChartTest {

    public static void main(String[] args) {

 //     创建类别图（Category）数据对象

       DefaultCategoryDataset dataset = new DefaultCategoryDataset();

       dataset.addValue(100, "北京", "苹果");

       dataset.addValue(100, "上海", "苹果");

       dataset.addValue(100, "广州", "苹果");

       dataset.addValue(200, "北京", "梨子");

       dataset.addValue(200, "上海", "梨子");

       dataset.addValue(200, "广州", "梨子");

       dataset.addValue(300, "北京", "葡萄");

       dataset.addValue(300, "上海", "葡萄");

       dataset.addValue(300, "广州", "葡萄");

       dataset.addValue(400, "北京", "香蕉");

       dataset.addValue(400, "上海", "香蕉");

       dataset.addValue(400, "广州", "香蕉");

       dataset.addValue(500, "北京", "荔枝");

       dataset.addValue(500, "上海", "荔枝");

       dataset.addValue(500, "广州", "荔枝");
       //创建主题样式
       StandardChartTheme standardChartTheme=new StandardChartTheme("CN");
       //设置标题字体
       standardChartTheme.setExtraLargeFont(new Font("隶书",Font.BOLD,20));
       //设置图例的字体
       standardChartTheme.setRegularFont(new Font("宋书",Font.PLAIN,15));
       //设置轴向的字体
       standardChartTheme.setLargeFont(new Font("宋书",Font.PLAIN,15));
       //应用主题样式
       ChartFactory.setChartTheme(standardChartTheme);
        JFreeChart chart=ChartFactory.createBarChart3D("水果产量图", "水果", "水果", dataset, PlotOrientation.VERTICAL, true, true, true);
 //        TextTitle textTitle = chart.getTitle();
 //      textTitle.setFont(new Font("宋体", Font.BOLD, 20));
 //      LegendTitle legend = chart.getLegend();
 //      if (legend != null) {
 //          legend.setItemFont(new Font("宋体", Font.BOLD, 20));
 //      }
       ChartFrame  frame=new ChartFrame ("水果产量图 ",chart,true);
       frame.pack();
       frame.setVisible(true);
    }
}

二、制定乱码文字的字体

使用JFreeChart绘制图表的时候，如果使用默认的字体会导致图标中的汉字显示为乱码。解决方法如下：

JFreeChart是用户使用该库提供的各类图标的统一接口，JFreeChart主要由三个部分构成：title(标题),legend(图释),plot(图表主体)。三个部分设置字体的方法分别如下：

1.Title

TextTitle textTitle = freeChart.getTitle();
textTitle.setFont(new Font("宋体",Font.BOLD,20));

2.Legent

LegendTitle legend = freeChart.getLegend();
 if (legend!=null) {
legend.setItemFont(new Font("宋体", Font.BOLD, 20));
}

3.Plot

 

对于不同类型的图表对应Plot的不同的实现类，设置字体的方法也不完全相同。

对于使用CategoryPlot的图表(如柱状图):

CategoryPlot plot = (CategoryPlot)freeChart.getPlot();
CategoryAxis domainAxis = plot.getDomainAxis();//(柱状图的x轴)
domainAxis.setTickLabelFont(new Font("宋体",Font.BOLD,20));//设置x轴坐标上的字体
domainAxis.setLabelFont(new Font("宋体",Font.BOLD,20));//设置x轴上的标题的字体
ValueAxis valueAxis = plot.getRangeAxis();//(柱状图的y轴)
valueAxis.setTickLabelFont(new Font("宋体",Font.BOLD,20));//设置y轴坐标上的字体
valueAxis.setLabelFont(new Font("宋体",Font.BOLD,20));//设置y轴坐标上的标题的字体
CategoryPlot plot = (CategoryPlot)freeChart.getPlot();
CategoryAxis domainAxis = plot.getDomainAxis();//(柱状图的x轴)
domainAxis.setTickLabelFont(new Font("宋体",Font.BOLD,20));//设置x轴坐标上的字体
domainAxis.setLabelFont(new Font("宋体",Font.BOLD,20));//设置x轴上的标题的字体
ValueAxis valueAxis = plot.getRangeAxis();//(柱状图的y轴)
valueAxis.setTickLabelFont(new Font("宋体",Font.BOLD,20));//设置y轴坐标上的字体
valueAxis.setLabelFont(new Font("宋体",Font.BOLD,20));//设置y轴坐标上的标题的字体

对于使用PiePlot的图标(如饼状图)：

PiePlot plot = (PiePlot)freeChart.getPlot();
plot.setLabelFont(new Font("宋体",Font.BOLD,15));

对于使用PiePlot的图标(如饼状图)：

PiePlot plot = (PiePlot)freeChart.getPlot();
plot.setLabelFont(new Font("宋体",Font.BOLD,15));

下面一个实例： 
 

 package com.zzs.jfreechart.demo;

 import java.awt.Font;
 import javax.swing.JPanel;
 import org.jfree.chart.ChartFactory;
 import org.jfree.chart.ChartPanel;
 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.plot.PiePlot;
 import org.jfree.chart.title.LegendTitle;
 import org.jfree.chart.title.TextTitle;
 import org.jfree.data.general.DefaultPieDataset;
 import org.jfree.data.general.PieDataset;
 import org.jfree.ui.ApplicationFrame;
 public class JfreeChartOne extends ApplicationFrame {
    private static final long serialVersionUID = 1L;
    public JfreeChartOne(String s)
    {
        super(s);
        setContentPane(createJPanel());
    }
    public static void main(String[] args) {
        JfreeChartOne one = new JfreeChartOne("CityInfoPort公司组织架构图");
        one.pack();
        one.setVisible(true);
    }
    // 利用静态方法设定数据源(饼状图)
    public static PieDataset createPieDataset() {
        DefaultPieDataset defaultpiedataset = new DefaultPieDataset();
        defaultpiedataset.setValue("管理人员", 10.02D);
        defaultpiedataset.setValue("市场人员", 20.23D);
        defaultpiedataset.setValue("开发人员", 60.02D);
        defaultpiedataset.setValue("OEM人员", 10.02D);
        defaultpiedataset.setValue("其他人员", 5.11D);
        return defaultpiedataset;
    }
    // 通过ChartFactory创建JFreeChart的实例
    public static JFreeChart createJFreeChart(PieDataset p)
    {
        JFreeChart a = ChartFactory.createPieChart("CityInfoPort公司组织架构图", p,
                true, true, true);
        // JFreeChart主要由三个部分构成：title(标题),legend(图释),plot(图表主体)。
        //三个部分设置字体的方法分别如下:
        TextTitle textTitle = a.getTitle();
        textTitle.setFont(new Font("宋体", Font.BOLD, 20));
        LegendTitle legend = a.getLegend();
        if (legend != null) {
            legend.setItemFont(new Font("宋体", Font.BOLD, 20));
        }
        PiePlot pie = (PiePlot) a.getPlot();
        pie.setLabelFont(new Font("宋体", Font.BOLD, 12));
        pie.setNoDataMessage("No data available");
        pie.setCircular(true);
        pie.setLabelGap(0.01D);// 间距
        return a;
    }
    public static JPanel createJPanel() {
        JFreeChart jfreechart = createJFreeChart(createPieDataset());
        return new ChartPanel(jfreechart);
    }
}

下面这个修改坐标轴：

 package com.zzs.jfreechart.demo;

 import java.awt.Color;
 import java.awt.Font;
 import org.jfree.chart.ChartFactory;
 import org.jfree.chart.ChartFrame;
 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.axis.CategoryAxis;
 import org.jfree.chart.axis.ValueAxis;
 import org.jfree.chart.plot.XYPlot;
 import org.jfree.chart.title.LegendTitle;
 import org.jfree.chart.title.TextTitle;
 import org.jfree.data.time.Month;
 import org.jfree.data.time.TimeSeries;
 import org.jfree.data.time.TimeSeriesCollection;
 import org.jfree.ui.RectangleInsets;
 public class ShiJianXuLieTu01 {

    /**
      * @param args
      */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //时间序列图
           TimeSeries timeseries = new TimeSeries("L&G European Index Trust",Month.class);
           timeseries.add(new Month(2, 2001), 181.8D);//这里用的是Month.class，同样还有Day.class Year.class 等等
           timeseries.add(new Month(3, 2001), 167.3D);
           timeseries.add(new Month(4, 2001), 153.8D);
           timeseries.add(new Month(5, 2001), 167.6D);
           timeseries.add(new Month(6, 2001), 158.8D);
           timeseries.add(new Month(7, 2001), 148.3D);
           timeseries.add(new Month(8, 2001), 153.9D);
           timeseries.add(new Month(9, 2001), 142.7D);
           timeseries.add(new Month(10, 2001), 123.2D);
           timeseries.add(new Month(11, 2001), 131.8D);
           timeseries.add(new Month(12, 2001), 139.6D);
           timeseries.add(new Month(1, 2002), 142.9D);
           timeseries.add(new Month(2, 2002), 138.7D);
           timeseries.add(new Month(3, 2002), 137.3D);
           timeseries.add(new Month(4, 2002), 143.9D);
           timeseries.add(new Month(5, 2002), 139.8D);
           timeseries.add(new Month(6, 2002), 137D);
           timeseries.add(new Month(7, 2002), 132.8D);
           TimeSeries timeseries1 = new TimeSeries("L&G UK Index Trust曾召帅",Month.class);

           timeseries1.add(new Month(2, 2001), 129.6D);
           timeseries1.add(new Month(3, 2001), 123.2D);
           timeseries1.add(new Month(4, 2001), 117.2D);
           timeseries1.add(new Month(5, 2001), 124.1D);
           timeseries1.add(new Month(6, 2001), 122.6D);
           timeseries1.add(new Month(7, 2001), 119.2D);
           timeseries1.add(new Month(8, 2001), 116.5D);
           timeseries1.add(new Month(9, 2001), 112.7D);
           timeseries1.add(new Month(10, 2001), 101.5D);
           timeseries1.add(new Month(11, 2001), 106.1D);
           timeseries1.add(new Month(12, 2001), 110.3D);
           timeseries1.add(new Month(1, 2002), 111.7D);
           timeseries1.add(new Month(2, 2002), 111D);
           timeseries1.add(new Month(3, 2002), 109.6D);
           timeseries1.add(new Month(4, 2002), 113.2D);
           timeseries1.add(new Month(5, 2002), 111.6D);
           timeseries1.add(new Month(6, 2002), 108.8D);
           timeseries1.add(new Month(7, 2002), 101.6D);
           TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();

           timeseriescollection.addSeries(timeseries);
            timeseriescollection.addSeries(timeseries1);
            timeseriescollection.setDomainIsPointsInTime(true); //domain轴上的刻度点代表的是时间点而不是时间段
           JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("合法 & General Unit Trust Prices",
                  "日期",
                  "暗示的话发神经提防",
                  timeseriescollection,
                  true,
                  true,
                  false);
                  jfreechart.setBackgroundPaint(Color.white);
                  TextTitle textTitle = jfreechart.getTitle();
                textTitle.setFont(new Font("宋体", Font.BOLD, 20));
                LegendTitle legend = jfreechart.getLegend();
                if (legend != null) {
                    legend.setItemFont(new Font("宋体", Font.BOLD, 20));
                }
                  XYPlot xyplot = (XYPlot)jfreechart.getPlot(); //获得 plot : XYPlot!!
                  ValueAxis domainAxis=xyplot.getDomainAxis();
                  domainAxis.setTickLabelFont(new Font("宋体",Font.BOLD,20));//设置x轴坐标上的字体
                  domainAxis.setLabelFont(new Font("宋体",Font.BOLD,20));//设置x轴坐标上的标题的字体
                  ValueAxis rangeAxis=xyplot.getRangeAxis();
                  rangeAxis.setTickLabelFont(new Font("宋体",Font.BOLD,20));//设置y轴坐标上的字体
                  rangeAxis.setLabelFont(new Font("宋体",Font.BOLD,20));//设置y轴坐标上的标题的字体
                  xyplot.setBackgroundPaint(Color.lightGray);
                  xyplot.setDomainGridlinePaint(Color.white);
                  xyplot.setRangeGridlinePaint(Color.white);
                  xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));
                  xyplot.setDomainCrosshairVisible(true);
                  xyplot.setRangeCrosshairVisible(true);
                  ChartFrame  frame=new ChartFrame ("折线图 ",jfreechart,true);
                  frame.pack();
                  frame.setVisible(true);
    }
}