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FROM dragonwell-registry.cn-hangzhou.cr.aliyuncs.com/dragonwell/dragonwell:21
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# WORKDIR指令用于设置容器内部的工作目录，即后续指令执行时的当前目录。当Docker容器启动并执行命令时，这些命令将在WORKDIR指定的目录中执行。
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WORKDIR /root
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# ENV TZ这样的用法通常是用来设置时区环境变量，TZ代表Time Zone
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ENV TZ=Asia/Shanghai
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# 声明变量
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ENV file_name="dsBase-jar-with-dependencies.jar"
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# 让容器内部正常显示中文
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ENV LANG=C.UTF-8
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# 将jar包复制到容器的/root目录下
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COPY $file_name /root/$file_name
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#设置这个环境变量后，您可以在Docker容器中启动Java应用程序时使用这些参数。
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ENV JAVA_OPTS="-Xms1024m -Xmx2048m"
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# 标识为生产环境
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ENV WORKING_ENV="dev"
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ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -jar $file_name" ]
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