使用<尖括号>批量写入文本文件； [英] Batch Write to Text File with <Angle Brackets>

问题描述

我正在尝试使用批处理脚本动态创建一个小的XML文件，但是在编写以尖括号开头和结尾的行时遇到了问题.

I am attempting to dynamically create a small XML file with a Batch Script, but am having issues writing lines that begin and end with angle brackets.

1)如果我执行以下操作:

1) If I do something like:

set foo=^<bar^>
echo %foo% > test.txt

这将导致

> was unexpected at this time.
echo <bar> > test.txt

2)如果在echo mentment变量周围加上引号:echo "%foo%" > test.txt，它将成功写入文本文件.但是它显然包含了我所没有的报价.

2) If I surround the echo statment variable with quotes: echo "%foo%" > test.txt, it writes successfully to the text file. However it obviously includes the quotes which I can't have.

3)然后我想:好吧，它必须只是尖括号在开头和结尾..."所以我在尖括号之前和之后添加了一个字符:

3) Then I thought "Well, it must just be the angle brackets at the beginning and end..." So I added a character before and after the angle brackets:

set foo=a^<bar^>a
echo %foo% > test.txt

这会导致一些奇怪的输出，好像我的括号被编号了，然后它正在寻找文件?

This resulted in some weird output which looks like my brackets are being numbered, and then it's looking for a file?

echo a 0<bar 1>test.txt
The system cannot find the file specified.

我以前写过基本的批处理脚本，但感觉就像我在这里头...任何帮助，感激不尽！

I've written elementary batch scripts before, but feel like I'm in over my head here... Any help is appreciated!

推荐答案

尝试一下:

setlocal ENABLEDELAYEDEXPANSION

set foo=^<bar^>
echo !foo! > test.txt

endlocal

使用延迟扩展，然后将%替换为!会导致对它的评估有所不同.

Using delayed expansion, and replacing the % with ! causes it to evaluate it differently.

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