思路：从注册表中提取当前系统“桌面”对应的目录，一般是“ %USERPROFILE%\桌面 ”（实际对应：C:\Documents and Settings\Administrator），赋值为变量 aa，COPY是用到%aa%，结果提示找不到路径，原来aa的值是“%USERPROFILE%\桌面”，COPY无法找到对应字符，直接显示成 copy "E:\Program Files\EDU\直接采集.txt" "%USERPROFILE%\桌面\直接采集.txt"，而不是显示成 copy "E:\Program Files\EDU\直接采集.txt" "C:\Documents and Settings\Administrator\桌面\直接采集.txt"，
setlocal enabledelayedexpansion
set "r=HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders"
for /f "skip=2 tokens=3" %%b in ('reg query "%r%" /v "desktop"') do set aa=%%b
pause
copy "E:\Program Files\EDU\直接采集.txt" "%aa%\直接采集.txt"
