我想为server.jar文件编写一个小的更新工具，以节省我手动执行的所有工作，而我正在使用的程序会在创建新更新时创建一个包含文件的文件夹。该程序几乎是这样工作的：
get hash of current server.jar
find latest created folder (eg. update12)
open the file in the update12 folder (eg. update12.txt)
***extract the hash code -> %newHash%*** thats where im having the issue
compare the extracted hashcode (%newHash%) and the calculated hashcode (%currentHash%)
if they are not equal go to www.downloadupdate.com/updates/%newHash%/server.jar
download the file and replace the old server.jar with the new one.
我遇到的问题是我无法读出update12.txt中的哈希，该文件长约36000个符号，并且仅一行
“服务器”：{“ sha1”：“ 16f18c21286a3f566d3d0431d13aa133bebe6eff”
我想检测“服务器”：{“ sha1”：“部分并复制哈希值，之后我尝试了在该论坛上找到的许多选项，但似乎没有一个像这样工作
set /p txt=<update12.txt
pause >nul
echo %txt%
pause >nul
for /f %%i in ('powershell -noprofile -c "('%txt:"=\"%' -split '\""')[1]"') do set id=%%i
echo %id%
只是导致批处理文件立即关闭，另外设置/ p txt =
如果您有任何解决方案，我将不胜感激
@echo off
Setlocal EnableDelayedExpansion
xcopy %appdata%\.minecraft\versions\%MCversion%\%MCversion%.json %appdata%\.minecraft\versions\%MCversion%\%MCversion%.text*
ren %appdata%\.minecraft\versions\%MCversion%\%MCversion%.text %MCversion%.txt
set search1=
set search2=,
set search3=:
set textFile=%appdata%\.minecraft\versions\%MCversion%\%MCversion%.txt
:PowerShell
SET PSScript=%temp%\~tmpStrRplc.ps1
ECHO (Get-Content "%textFile%").replace("%search1%", "") ^| Set-Content "%textFile%">"%PSScript%"
Powershell -ExecutionPolicy Bypass -Command "& '%PSScript%'"
SET PSScript=%temp%\~tmpStrRplc.ps1
echo done.
ECHO (Get-Content "%textFile%").replace("%search2%", "") ^| Set-Content "%textFile%">"%PSScript%"
Powershell -ExecutionPolicy Bypass -Command "& '%PSScript%'"
SET PSScript=%temp%\~tmpStrRplc.ps1
echo done.
ECHO (Get-Content "%textFile%").replace("%search3%", "") ^| Set-Content "%textFile%">"%PSScript%"
Powershell -ExecutionPolicy Bypass -Command "& '%PSScript%'"
SET PSScript=%temp%\~tmpStrRplc.ps1
echo done.
:skip
ECHO (Get-Content "%textFile%").replace("server", "`r`nlookup") ^| Set-Content "%textFile%">"%PSScript%"
Powershell -ExecutionPolicy Bypass -Command "& '%PSScript%'"
echo done.
for /f %%a in ('findstr "lookup\"{\"sha1\"\"" %textFile%') do set "newVersion=%%a"
set newVersion=%newVersion:~15,40%
echo %newVersion%
del %textFile%
pause
:exit
exit
该代码对我有用，它的作用是：
copy the "update12.txt"
look for " " "," and ":" in the copied txt and delete the symbols
look for server replace it with a "*linebreak*lookup"
find the string lookup"{"sha1""
trim the edges of the string with 15,40
done.
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我来说两句