Project scenario ：

Use JasperReports Conduct PDF export

Problem description

stay JasperReports Incompatible with higher version itext Thrown exception Some netizens said in their comments 6.19.0 Abnormal Chinese display

Cause analysis ：

May be Maven When compiling, the font File corruption 了 , perhaps Configure Fonts Wrong way , Or it is configured with the template The font is inconsistent

Solution ：

1. First the Maven Compile and compress binary function is off , May refer to Maven Solution of file corruption caused by compressing resources
2. Check the font configured in the template
   such as ： The font of the template I configure here is Chinese Songti
   
3. Configure fonts in the project
   
   among ：stsong.TTF( The font file )、fonts.xml( Font file configuration )、jasperreports_extension.properties(JasperReports Configuration file for )

fonts.xml

<?xml version="1.0" encoding="UTF-8"?>
<fontFamilies>
    <fontFamily name = " Chinese Songti ">
        <normal>stsong/stsong.TTF</normal>
        <bold>stsong/stsong.TTF</bold>
        <italic>stsong/stsong.TTF</italic>
        <boldItalic>stsong/stsong.TTF</boldItalic>
        <pdfEncoding>Identity-H</pdfEncoding>
        <pdfEmbedded>true</pdfEmbedded>
        <exportFonts>
            <export key = "net.sf.jasperreports.html">' Chinese Songti ', Arial, Helvetica, sans-serif</export>
            <export key = "net.sf.jasperreports.xhtml">' Chinese Songti ', Arial, Helvetica, sans-serif</export>
        </exportFonts>
    </fontFamily>
</fontFamilies>

jasperreports_extension.properties

# JasperReports Factory of font configuration 
net.sf.jasperreports.extension.registry.factory.simple.font.families=net.sf.jasperreports.engine.fonts.SimpleFontExtensionsRegistryFactory
#  Specify the location of the font configuration 
net.sf.jasperreports.extension.simple.font.families.lobstertwo=stsong/fonts.xml

* notes ： If the above is still not possible , Ben UP The Lord also has no way , After all, my project can display Chinese normally with this configuration ！