如何在Bat脚本的文件名字符串中添加三字母星期缩写？

要在fileNameStr末尾添加三字母星期缩写（如SUN、MON等），可以通过以下步骤修改你的批处理脚本：

1. 获取星期数值并映射为缩写 #

在提取年月日的代码之后，添加获取当前星期数值并映射为大写三字母缩写的逻辑：

:: 获取星期数值（0=周日，1=周一...6=周六）
for /f "tokens=2 delims==" %%D in ('"wmic path win32_localtime get dayofweek /value"') do set "dayofweek=%%D"

:: 映射星期数值为三字母缩写
set "weekday="
if "%dayofweek%"=="0" set "weekday=SUN"
if "%dayofweek%"=="1" set "weekday=MON"
if "%dayofweek%"=="2" set "weekday=TUE"
if "%dayofweek%"=="3" set "weekday=WED"
if "%dayofweek%"=="4" set "weekday=THU"
if "%dayofweek%"=="5" set "weekday=FRI"
if "%dayofweek%"=="6" set "weekday=SAT"

2. 修改fileNameStr变量 #

将星期缩写追加到fileNameStr末尾：

set fileNameStr=%year%_%month%_%day%_%weekday%

完整修改后的脚本 #

@echo off
setlocal

:: Get the current date and time
for /f "tokens=2 delims==" %%I in ('"wmic os get localdatetime /value"') do set "datetime=%%I"

:: Extract year, month, and day
set "year=%datetime:~0,4%"
set "month=%datetime:~4,2%"
set "day=%datetime:~6,2%"

:: 获取星期数值（0=周日，1=周一...6=周六）
for /f "tokens=2 delims==" %%D in ('"wmic path win32_localtime get dayofweek /value"') do set "dayofweek=%%D"

:: 映射星期数值为三字母缩写
set "weekday="
if "%dayofweek%"=="0" set "weekday=SUN"
if "%dayofweek%"=="1" set "weekday=MON"
if "%dayofweek%"=="2" set "weekday=TUE"
if "%dayofweek%"=="3" set "weekday=WED"
if "%dayofweek%"=="4" set "weekday=THU"
if "%dayofweek%"=="5" set "weekday=FRI"
if "%dayofweek%"=="6" set "weekday=SAT"

:: Convert month number to month abbreviation
set "monthname="
if "%month%"=="01" set "monthname=Jan"
if "%month%"=="02" set "monthname=Feb"
if "%month%"=="03" set "monthname=Mar"
if "%month%"=="04" set "monthname=Apr"
if "%month%"=="05" set "monthname=May"
if "%month%"=="06" set "monthname=Jun"
if "%month%"=="07" set "monthname=Jul"
if "%month%"=="08" set "monthname=Aug"
if "%month%"=="09" set "monthname=Sep"
if "%month%"=="10" set "monthname=Oct"
if "%month%"=="11" set "monthname=Nov"
if "%month%"=="12" set "monthname=Dec"

:: Format year to two digits
set "year_short=%year:~2,2%"

:: Combine into desired format
set "formatted_date=%monthname%%day%%year_short%"
set fileNameStr=%year%_%month%_%day%_%weekday%

:: Define the filename for the downloaded file
set OUTPUT_FILE="pdfs\%year%-%month%\%fileNameStr%.pdf"

简化方案（依赖PowerShell） #

如果你的系统允许使用PowerShell，可以用一行代码直接获取星期缩写，替换上述的星期数值获取和映射部分：

:: 用PowerShell直接获取大写三字母星期缩写
for /f %%W in ('powershell -Command "(Get-Date).ToString('ddd').ToUpper()"') do set "weekday=%%W"

内容的提问来源于stack exchange，提问作者Tyler Moore