powershell重定向文本文件时注意显性指定编码

powershell编码，如果想生成的文件名和文件内容中的中文正常

看下https://til.secretgeek.net/powershell/out-file-encoding.html

-encoding ascii

-encoding default

-encoding oem

-encoding utf7

安装个notepad++（https://github.com/notepad-plus-plus/notepad-plus-plus），powershell执行下面代码后，用notepad++挨个打开去看，上面列出的4种是utf-8，我一般用-encoding ascii，尤其是.bat、.cmd、.vbs这些可执行文件，编码一定要显性指定-encoding ascii

"unknown" | out-file "c:\out-file-unknown.txt" -encoding unknown

"string" | out-file "c:\out-file-string.txt" -encoding string

"unicode" | out-file "c:\out-file-unicode.txt" -encoding unicode

"bigendianunicode" | out-file "c:\out-file-bigendianunicode.txt" -encoding bigendianunicode

"utf8" | out-file "c:\out-file-utf8.txt" -encoding utf8

"utf7" | out-file "c:\out-file-utf7.txt" -encoding utf7

"utf32" | out-file "c:\out-file-utf32.txt" -encoding utf32

"ascii" | out-file "c:\out-file-ascii.txt" -encoding ascii

"default" | out-file "c:\out-file-default.txt" -encoding default

"oem" | out-file "c:\out-file-oem.txt" -encoding oem

如果是记事本编辑中文，保存的时候选择ANSI

.ps1里尽量不要用中文，要用就把中文转成Unicode编码去写代码

比如下面这种不可取

if ($Disk -match 'Disk%s+(?<DiskIdx>%d+)%s+(Online|Offline)%s+(?<Size>%d+)%s+GB%s+(?<Free>%d+)|磁盘%s+(?<DiskIdx>%d+)%s+(联机|脱机)%s+(?<Size>%d+)%s+GB%s+(?<Free>%d+)|Disk%s+(?<DiskIdx>%d+)%s+(Online|Offline)%s+(?<Size>%d+)%s+TB%s+(?<Free>%d+)|磁盘%s+(?<DiskIdx>%d+)%s+(联机|脱机)%s+(?<Size>%d+)%s+TB%s+(?<Free>%d+)')
{

}

应该是

if ($Disk -match 'Disk\s+(?<DiskIdx>\d+)\s+(Online|Offline)\s+(?<Size>\d+)\s+GB\s+(?<Free>\d+)|\u78c1\u76d8\s+(?<DiskIdx>\d+)\s+(\u8054\u673a|\u8131\u673a)\s+(?<Size>\d+)\s+GB\s+(?<Free>\d+)|Disk\s+(?<DiskIdx>\d+)\s+(Online|Offline)\s+(?<Size>\d+)\s+TB\s+(?<Free>\d+)|\u78c1\u76d8\s+(?<DiskIdx>\d+)\s+(\u8054\u673a|\u8131\u673a)\s+(?<Size>\d+)\s+TB\s+(?<Free>\d+)')
{

}

微软资料：https://learn.microsoft.com/zh-cn/powershell/module/microsoft.powershell.core/about/about_character_encoding