Windows 批处理文件 - 拆分字符串以设置变量
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Windows batch file - splitting a string to set variables
提问by AndyC
I feel like I'm going around in circles with FOR loop options.
我觉得我在循环使用 FOR 循环选项。
I'm trying to take a string (output of a command) and split it on commas, then use each value to SET, e.g.
我正在尝试获取一个字符串（命令的输出）并将其拆分为逗号，然后使用每个值进行设置，例如
String: USER=Andy,IP=1.2.3.4,HOSTNAME=foobar,PORT=1234
细绳： USER=Andy,IP=1.2.3.4,HOSTNAME=foobar,PORT=1234
So I want to split on comma and then literally use that variable in SET. I don't know ahead of time how many many variables there will be.
所以我想用逗号分割，然后在 SET 中直接使用该变量。我提前不知道会有多少变数。
I've tried things like:
我试过这样的事情：
FOR %%L IN (%MYSTRING%) DO ECHO %%L
but that splits on the equals sign too so I end up with
但这也在等号上分裂，所以我最终得到
USER
Andy
IP
1.2.3.4
etc
等等
I just want to be able to do the following so I can SET USER=Andyetc, something like:
我只想能够执行以下操作，以便我可以SET USER=Andy等，例如：
FOR %%L IN (%MYSTRING%) DO SET %%L
What option or flags am I missing?
我缺少什么选项或标志？
回答by Aacini
The default delimiters for elements in plain FORcommand (no /Foption) are spaces, tab, commas, semicolons and equal signs, and there is no way to modify that, so you may use FOR /Fcommand to solve this problem this way:
普通FOR命令（无/F选项）中元素的默认分隔符是空格、制表符、逗号、分号和等号，并且无法修改，因此您可以使用FOR /F命令来解决这个问题：
@echo off
set MYSTRING=USER=Andy,IP=1.2.3.4,HOSTNAME=foobar,PORT=1234
:nextVar
for /F "tokens=1* delims=," %%a in ("%MYSTRING%") do (
set %%a
set MYSTRING=%%b
)
if defined MYSTRING goto nextVar
echo USER=%USER%, IP=%IP%, HOSTNAME=%HOSTNAME%, PORT=%PORT%
Another way to solve this problem is first taking the variable name and then executing the assignment for each pair of values in a regular FOR command:
解决此问题的另一种方法是首先获取变量名称，然后在常规 FOR 命令中为每对值执行赋值：
setlocal EnableDelayedExpansion
set varName=
for %%a in (%MYSTRING%) do (
if not defined varName (
set varName=%%a
) else (
set !varName!=%%a
set varName=
)
)
echo USER=%USER%, IP=%IP%, HOSTNAME=%HOSTNAME%, PORT=%PORT%
回答by Marco Montel
In case your input is something like HOSTNAME:PORT and you need to split into separate variables then you can use this
如果您的输入类似于 HOSTNAME:PORT 并且您需要拆分为单独的变量，那么您可以使用它
@echo off
set SERVER_HOST_PORT=10.0.2.15:8080
set SERVER_HOST_PORT=%SERVER_HOST_PORT::=,%
for /F "tokens=1* delims=," %%a in ("%SERVER_HOST_PORT%") do (
set SERVER_HOST=%%a
set SERVER_PORT=%%b
)
echo SERVER_HOST=%SERVER_HOST%
echo SERVER_PORT=%SERVER_PORT%
