今天就跟大家聊聊有关JFreeChart中文乱码的解决方法，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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：
Title
TextTitle textTitle = freeChart.getTitle(); textTitle.setFont(new Font("宋体",Font.BOLD,20));Legent
LegendTitle legend = freeChart.getLegend(); if (legend!=null) { legend.setItemFont(new Font("宋体", Font.BOLD, 20)); }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 { 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); } }看完上述内容，你们对JFreeChart中文乱码的解决方法有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注编程网行业资讯频道，感谢大家的支持。
