OpenJDK:8-jdk-alpine验证码无法显示
java.lang.NullPointerException at sun.awt.FontConfiguration.getVersion
报错如下：
linux服务器
yum install fontconfig fc-cache --force
dockerfile容器操作
#软件源修改为国内镜像站
RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories
#修改时区为国内
RUN apk add tzdata && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
&& echo "Asia/Shanghai" > /etc/timezone && apk del tzdata
# 增加字体，解决验证码、图片处理没有字体报空指针问题
RUN apk add --update ttf-dejavu fontconfig && rm -rf /var/cache/apk/*
完整dockerfile
FROM openjdk:8-jdk-alpine
MAINTAINER jin820100449@qq.com
RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories \
&& apk add tzdata && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
&& echo "Asia/Shanghai" > /etc/timezone && apk del tzdata \
&& apk add --update ttf-dejavu fontconfig && rm -rf /var/cache/apk/*
RUN mkdir /alidata && \
mkdir /alidata/app && \
mkdir /alidata/app/site && \
mkdir /alidata/app/site/log && \
mkdir /alidata/app/site/agent && \
mkdir /alidata/app/site/config
VOLUME /alidata/app/site/log
VOLUME /alidata/app/site
WORKDIR /alidata/app/site
ENV JAVA_OPTS=""
ENV SW_OPTS=""
ENV APP_PROFILE="test"
COPY application.yml /alidata/app/site/config
COPY application-test.yml /alidata/app/site/config
ENTRYPOINT [ "sh", "-c", "java $SW_OPTS $JAVA_OPTS -jar /alidata/app/site/*.jar --spring.profiles.active=$APP_PROFILE -Dfile.encoding=utf-8"]
COPY fosow-ctservice-0.0.1-SNAPSHOT.jar /alidata/app/site/fosow-ctservice-0.0.1-SNAPSHOT.jar
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
EXPOSE 8080
