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);
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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);
}
}
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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));
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2.Legent
LegendTitle legend = freeChart.getLegend();
if (legend!=null) {
legend.setItemFont(new Font("宋体", Font.BOLD, 20));
}
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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
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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));
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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));
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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);
}
}
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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);
}
}
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原文链接:http://zengzhaoshuai.iteye.com/blog/1000378
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