问题描述

** 在SpringBoot项目中使用了Ureport报表组件, 打包发布部署到docker中启动报错 **

java.lang.NullPointerExceptionat 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.access$000(Font.java:224)at java.awt.Font$FontAccessImpl.getFont2D(Font.java:228)at sun.font.FontUtilities.getFont2D(FontUtilities.java:180)at sun.font.StandardGlyphVector.initFontData(StandardGlyphVector.java:1126)at sun.font.StandardGlyphVector.init(StandardGlyphVector.java:1115)at sun.font.StandardGlyphVector.<init>(StandardGlyphVector.java:167)at java.awt.Font.createGlyphVector(Font.java:2545)at nl.captcha.text.renderer.DefaultWordRenderer.render(Unknown Source)at nl.captcha.Captcha$Builder.addText(Unknown Source)at com.liferay.portal.captcha.simplecaptcha.SimpleCaptchaImpl.getSimpleCaptcha(SimpleCaptchaImpl.java:243)at com.liferay.portal.captcha.simplecaptcha.SimpleCaptchaImpl.serveImage(SimpleCaptchaImpl.java:159)at com.liferay.portal.captcha.CaptchaImpl.serveImage(CaptchaImpl.java:100)at com.liferay.portal.kernel.captcha.CaptchaUtil.serveImage(CaptchaUtil.java:78)at com.liferay.portal.captcha.CaptchaPortletAction.serveResource(CaptchaPortletAction.java:42)

问题解决

** 参考资料地址: http://https://www.jianshu.com/p/e39ee0cad05b **

FROM java:8-alpine
RUN echo -e "https://mirror.tuna.tsinghua.edu.cn/alpine/v3.4/main\n\
https://mirror.tuna.tsinghua.edu.cn/alpine/v3.4/community" > /etc/apk/repositories
RUN apk --update add curl bash ttf-dejavu && \rm -rf /var/cache/apk/*

使用此Dockerfile重新build一个java镜像即可