我有一个Java应用的Docker文件 - https://hub.docker.com/r/songkong/songkong/~/dockerfile/
其中一个问题是DockerFile似乎没有安装任何字体,这导致了我的应用程序出现了错误。
java.lang.NullPointerException
at sun.awt.FontConfiguration.getVersion(FontConfiguration.java:1264)
at sun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:219)
at sun.awt.FontConfiguration.init(FontConfiguration.java:107)
at sun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:774)
at sun.font.SunFontManager$2.run(SunFontManager.java:431)
at java.security.AccessController.doPrivileged(Native Method)
at sun.font.SunFontManager.<init>(SunFontManager.java:376)
at sun.awt.FcFontManager.<init>(FcFontManager.java:35)
at sun.awt.X11FontManager.<init>(X11FontManager.java:57)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at sun.font.FontManagerFactory$1.run(FontManagerFactory.java:83)
at java.security.AccessController.doPrivileged(Native Method)
at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74)
at java.awt.Font.getFont2D(Font.java:491)
at java.awt.Font.canDisplayUpTo(Font.java:2060)
at java.awt.font.TextLayout.singleFont(TextLayout.java:470)
at java.awt.font.TextLayout.<init>(TextLayout.java:531)
at org.apache.poi.ss.util.SheetUtil.getDefaultCharWidth(SheetUtil.java:275)
at org.apache.poi.xssf.streaming.AutoSizeColumnTracker.<init>(AutoSizeColumnTracker.java:117)
at org.apache.poi.xssf.streaming.SXSSFSheet.<init>(SXSSFSheet.java:79)
at org.apache.poi.xssf.streaming.SXSSFWorkbook.createAndRegisterSXSSFSheet(SXSSFWorkbook.java:656)
at org.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:677)
at org.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:83)
at com.jthink.songkong.reports.spreadsheet.Worksheet.<init>(Worksheet.java:23)
at com.jthink.songkong.reports.spreadsheet.BasicWorksheet.<init>(BasicWorksheet.java:15)
at com.jthink.songkong.reports.spreadsheet.SpreadsheetReport.<init>(SpreadsheetReport.java:51)
at com.jthink.songkong.reports.fixsongsreport.SpreadsheetReportSection.outputReport(SpreadsheetReportSection.java:82)
at com.jthink.songkong.reports.FixSongsReport.outputSpreadsheet(FixSongsReport.java:1033)
at com.jthink.songkong.reports.FixSongsReportCreator.createReport(FixSongsReportCreator.java:122)
at com.jthink.songkong.analyse.toplevelanalyzer.FixSongsController.start(FixSongsController.java:329)
at com.jthink.songkong.server.callback.ServerFixSongs$Task.run(ServerFixSongs.java:448)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
我之前在非Docker的Linux安装上遇到过这个问题,我通过将一些字体添加到我的应用程序下载中并使用以下方法解决了它
fc-cache -rv /opt/songkong/fonts
安装字体
我将字体添加到应用程序下载中,然后进行了添加操作。
CMD fc-cache -rv /opt/songkong/fonts;
我尝试将它添加到我的DockerFile中,但没有成功。
可能这不是正确的方法,是否有正确的方法。