图表和自定义字体

Question

I have some JasperReports report that uses custom font (Dejavu Serif) which works fine both on development and production machines. Today I added some chart to that report and configured all the font settings to Dejavu Serif. The chart itself works fine but I can't see any labels so I think the problem with custom font.. I found one post , but can't understand how they solved the problem..

Update #1: So I implemented Customizer class which configures the font of labels:

public class CustomFontCategoryChartCustomizer implements JRChartCustomizer  {

    /**
     * 
     */
    @Override
    public void customize(JFreeChart chart, JRChart jasperChart) {
        CategoryPlot plot = chart.getCategoryPlot();
        Font customFont = new Font("DejaVu Serif", Font.BOLD, 12);

        // Works fine
        plot.getDomainAxis().setTickLabelFont(customFont);
        plot.getRangeAxis().setTickLabelFont(customFont);
        plot.getRangeAxis().setUpperMargin(0.5);
        // Doesn't work
        LegendItemCollection legends = plot.getLegendItems();
        for (int i = 0; i < legends.getItemCount(); i++) {
            legends.get(i).setLabelFont(customFont);
        }
        plot.getLegendItems().addAll(legends);
        // Doesn't work
        LegendItemCollection legends = plot.getLegendItems();
        for (int i = 0; i < legends.getItemCount(); i++) {
            plot.getLegendItems().get(i).setLabelFont(customFont);
        }
    }
}

Everything fine except of legend labels.. Can't make it work with custom font.. Any help?

Answer 1

Nobody answered, so I'll dot it by myself... In order to use custom fonts in JasperReports's charts you should do the following:

1. Overload the JRChartCustomizer's customize method as showed:

    public class CustomFontCategoryChartCustomizer implements JRChartCustomizer { @Override public void customize(JFreeChart chart, JRChart jasperChart) { Font customFont = new Font("DejaVu Serif", Font.PLAIN, 9); CategoryPlot plot = chart.getCategoryPlot(); // Set legend's font chart.getLegend().setItemFont(customFont); // Set categories label's font plot.getDomainAxis().setTickLabelFont(customFont); // Set amounts label's font plot.getRangeAxis().setTickLabelFont(customFont); } } 

2. Add reference to iReport to your JRChartCustomizer implementation or to jar file

3. Configure Customizer Class option inside iReport's chart object with apapropriate class name. In my case with CustomFontCategoryChartCustomizer

That's it.

Answer 2

public class CustomFontCategoryChartCustomizer implements JRChartCustomizer  {
@Override
public void customize(JFreeChart chart, JRChart jasperChart) {
    Font customFont = getOpenSansFont("OpenSans-Regular.ttf")
    CategoryPlot plot = chart.getCategoryPlot();

    // Set legend's font        
    chart.getLegend().setItemFont(customFont);
    // Set categories label's font
    plot.getDomainAxis().setTickLabelFont(customFont);
    // Set amounts label's font 
    plot.getRangeAxis().setTickLabelFont(customFont);
  }

 private Font getOpenSansFont(String ttfFont) {
    try {
        String openSansAbsolutePath = "absolute/path/to/font"
        Font font = Font.createFont(Font.TRUETYPE_FONT, new File(openSansAbsolutePath));
        return font.deriveFont(10f);
    } catch (IOException | FontFormatException e) {
        println "Exception occur during create font." + e
    }
  }
}

You need to put ttf font in you application class path. It worked perfectly for me. I had used it one of my project.

Happy Coding.