Docker内不支持中文解决办法

在做一个项目的导出功能时，先在本地(Docker)创建好相应的Excel文件，然后写入数据，再将多个Excel文件打包成一个zip压缩包，接着上传到OSS，得到下载链接。下载到本地后打开发现压缩包内的文件名中的中文变成了??????，推断是java在Docker内创建中文文件名时，由于Docker内字符集并非UTF-8导致识别为不支持的字符。于是寻找修改容器内编码的解决方案。

一、查看当前使用的编码

root@6bc6bd3e52f2:/# locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

二、查看当前支持的编码

root@6bc6bd3e52f2:/# locale -a
locale: Cannot set LC_CTYPE to default locale: No such file or directory 
locale: Cannot set LC_MESSAGES to default locale: No such file or directory 
locale: Cannot set LC_COLLATE to default locale: No such file or directory
C
C.UTF-8
POSIX

可以看到，当前环境使用了不支持的字符编码，我的修改方式是在启动Docker实例时通过环境变量LANG指定字符编码，如果是自己构建的镜像，则在构建时增加这个环境变量，运行时就可以省略指定了

docker run -d -e LANG=C.UTF-8 myapp

参考：https://www.jianshu.com/p/ecf13d88534b
参考：https://www.jianshu.com/p/6fe582ba6d3d