jfreechart解决中文乱码问题

最新推荐文章于 2025-11-22 21:35:13 发布

原创最新推荐文章于 2025-11-22 21:35:13 发布 · 174 阅读

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文章标签：

#jfreechart #UI #Swing #.net

本文提供了解决使用JFreeChart绘制含有中文的图表时出现乱码问题的方法，通过调整字体设置实现了正确显示中文字符。示例代码包括创建数据集、生成图表以及对X轴、Y轴和图例的字体进行优化。

出现乱码的运行效果

原始程序如下

package net.java2000.jfreechat.demo.bar;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.StandardCategorySeriesLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class BarChartDemo1 extends ApplicationFrame {

public BarChartDemo1(String s) {
    super(s);
    JPanel jpanel = createDemoPanel();
    jpanel.setPreferredSize(new Dimension(500, 270));
    setContentPane(jpanel);
}

private static CategoryDataset createDataset() {
    String s = "每日PV";
    String s1 = "每日IP数";
    String s2 = "注册用户数";
    String s3 = "A网站";
    String s4 = "B网站";
    String s5 = "C网站";
    String s6 = "D网站";
    String s7 = "E网站";
    DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
    defaultcategorydataset.addValue(1.0D, s, s3);
    defaultcategorydataset.addValue(4D, s, s4);
    defaultcategorydataset.addValue(3D, s, s5);
    defaultcategorydataset.addValue(5D, s, s6);
    defaultcategorydataset.addValue(5D, s, s7);
    defaultcategorydataset.addValue(5D, s1, s3);
    defaultcategorydataset.addValue(7D, s1, s4);
    defaultcategorydataset.addValue(6D, s1, s5);
    defaultcategorydataset.addValue(8D, s1, s6);
    defaultcategorydataset.addValue(4D, s1, s7);
    defaultcategorydataset.addValue(4D, s2, s3);
    defaultcategorydataset.addValue(3D, s2, s4);
    defaultcategorydataset.addValue(2D, s2, s5);
    defaultcategorydataset.addValue(3D, s2, s6);
    defaultcategorydataset.addValue(6D, s2, s7);
    return defaultcategorydataset;
}

private static JFreeChart createChart(CategoryDataset categorydataset) {
    JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo 1", "网站", "数值",
        categorydataset, PlotOrientation.VERTICAL, true, true, false);
    CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();
    categoryplot.setDomainGridlinesVisible(true);
    categoryplot.setRangeCrosshairVisible(true);
    categoryplot.setRangeCrosshairPaint(Color.blue);
    NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
    numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    BarRenderer barrenderer = (BarRenderer) categoryplot.getRenderer();
    barrenderer.setBaseItemLabelFont(new Font("宋体", Font.PLAIN, 12));
    barrenderer.setSeriesItemLabelFont(1, new Font("宋体", Font.PLAIN, 12));


    barrenderer.setDrawBarOutline(false);
    GradientPaint gradientpaint = new GradientPaint(0.0F, 0.0F, Color.blue, 0.0F, 0.0F, new Color(
        0, 0, 64));
    GradientPaint gradientpaint1 = new GradientPaint(0.0F, 0.0F, Color.green, 0.0F, 0.0F,
        new Color(0, 64, 0));
    GradientPaint gradientpaint2 = new GradientPaint(0.0F, 0.0F, Color.red, 0.0F, 0.0F, new Color(
        64, 0, 0));
    barrenderer.setSeriesPaint(0, gradientpaint);
    barrenderer.setSeriesPaint(1, gradientpaint1);
    barrenderer.setSeriesPaint(2, gradientpaint2);
    barrenderer.setLegendItemToolTipGenerator(new StandardCategorySeriesLabelGenerator(
        "Tooltip: {0}"));
    CategoryAxis categoryaxis = categoryplot.getDomainAxis();
    categoryaxis.setCategoryLabelPositions(CategoryLabelPositions
        .createUpRotationLabelPositions(0.52359877559829882D));
    return jfreechart;
}

public static JPanel createDemoPanel() {
    JFreeChart jfreechart = createChart(createDataset());
    return new ChartPanel(jfreechart);
}

public static void main(String args[]) {
    BarChartDemo1 barchartdemo1 = new BarChartDemo1("黑体JFreeChart: BarChartDemo1.java");
    barchartdemo1.pack();
    RefineryUtilities.centerFrameOnScreen(barchartdemo1);
    barchartdemo1.setVisible(true);
}
}

增加如下的代码，解决汉字乱码问题

    CategoryAxis domainAxis = categoryplot.getDomainAxis();

    /*------设置X轴坐标上的文字-----------*/
    domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));

    /*------设置X轴的标题文字------------*/
    domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));

    /*------设置Y轴坐标上的文字-----------*/
    numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));

    /*------设置Y轴的标题文字------------*/
    numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));

    /*------这句代码解决了底部汉字乱码的问题-----------*/
    jfreechart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));

运行效果如下

完整代码

package net.java2000.jfreechat.demo.bar;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GradientPaint;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.StandardCategorySeriesLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class BarChartDemo1 extends ApplicationFrame {

public BarChartDemo1(String s) {
    super(s);
    JPanel jpanel = createDemoPanel();
    jpanel.setPreferredSize(new Dimension(500, 270));
    setContentPane(jpanel);
}

private static CategoryDataset createDataset() {
    String s = "每日PV";
    String s1 = "每日IP数";
    String s2 = "注册用户数";
    String s3 = "A网站";
    String s4 = "B网站";
    String s5 = "C网站";
    String s6 = "D网站";
    String s7 = "E网站";
    DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
    defaultcategorydataset.addValue(1.0D, s, s3);
    defaultcategorydataset.addValue(4D, s, s4);
    defaultcategorydataset.addValue(3D, s, s5);
    defaultcategorydataset.addValue(5D, s, s6);
    defaultcategorydataset.addValue(5D, s, s7);
    defaultcategorydataset.addValue(5D, s1, s3);
    defaultcategorydataset.addValue(7D, s1, s4);
    defaultcategorydataset.addValue(6D, s1, s5);
    defaultcategorydataset.addValue(8D, s1, s6);
    defaultcategorydataset.addValue(4D, s1, s7);
    defaultcategorydataset.addValue(4D, s2, s3);
    defaultcategorydataset.addValue(3D, s2, s4);
    defaultcategorydataset.addValue(2D, s2, s5);
    defaultcategorydataset.addValue(3D, s2, s6);
    defaultcategorydataset.addValue(6D, s2, s7);
    return defaultcategorydataset;
}

private static JFreeChart createChart(CategoryDataset categorydataset) {
    JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo 1", "网站", "数值",
        categorydataset, PlotOrientation.VERTICAL, true, true, false);
    CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();
    categoryplot.setDomainGridlinesVisible(true);
    categoryplot.setRangeCrosshairVisible(true);
    categoryplot.setRangeCrosshairPaint(Color.blue);
    NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
    numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    BarRenderer barrenderer = (BarRenderer) categoryplot.getRenderer();
    barrenderer.setBaseItemLabelFont(new Font("宋体", Font.PLAIN, 12));
    barrenderer.setSeriesItemLabelFont(1, new Font("宋体", Font.PLAIN, 12));

    CategoryAxis domainAxis = categoryplot.getDomainAxis();

    /*------设置X轴坐标上的文字-----------*/
    domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));

    /*------设置X轴的标题文字------------*/
    domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));

    /*------设置Y轴坐标上的文字-----------*/
    numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));

    /*------设置Y轴的标题文字------------*/
    numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));

    /*------这句代码解决了底部汉字乱码的问题-----------*/
    jfreechart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));

    barrenderer.setDrawBarOutline(false);
    GradientPaint gradientpaint = new GradientPaint(0.0F, 0.0F, Color.blue, 0.0F, 0.0F, new Color(
        0, 0, 64));
    GradientPaint gradientpaint1 = new GradientPaint(0.0F, 0.0F, Color.green, 0.0F, 0.0F,
        new Color(0, 64, 0));
    GradientPaint gradientpaint2 = new GradientPaint(0.0F, 0.0F, Color.red, 0.0F, 0.0F, new Color(
        64, 0, 0));
    barrenderer.setSeriesPaint(0, gradientpaint);
    barrenderer.setSeriesPaint(1, gradientpaint1);
    barrenderer.setSeriesPaint(2, gradientpaint2);
    barrenderer.setLegendItemToolTipGenerator(new StandardCategorySeriesLabelGenerator(
        "Tooltip: {0}"));
    CategoryAxis categoryaxis = categoryplot.getDomainAxis();
    categoryaxis.setCategoryLabelPositions(CategoryLabelPositions
        .createUpRotationLabelPositions(0.52359877559829882D));
    return jfreechart;
}

public static JPanel createDemoPanel() {
    JFreeChart jfreechart = createChart(createDataset());
    return new ChartPanel(jfreechart);
}

public static void main(String args[]) {
    BarChartDemo1 barchartdemo1 = new BarChartDemo1("黑体JFreeChart: BarChartDemo1.java");
    barchartdemo1.pack();
    RefineryUtilities.centerFrameOnScreen(barchartdemo1);
    barchartdemo1.setVisible(true);
}
}
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