如何使用xmlstarlet更新xml文件 [英] how to update the xml file using xmlstarlet

问题描述

我正在使用Windows版本的xmlstarlet通过Windows批处理文件来更新xml文件.

I am using windows version of xmlstarlet to update an xml file, via windows batch file.

xml edit --update "/xml/table/rec[@id=3]/@id" --value 10 %xmlfile%

我希望这会将rec节点的id属性更新为10.运行此命令时，我在命令行中看到了更新的xml，但是文件从未更新.

I expected this to update the id attribute of rec node to 10. When I run this I see the updated xml as expected in the command line, but the file is never updated.

我该怎么做，我想避免重写整个文件，因为文件可能很大.

How can I do it, I want to stay away rewriting the whole file as the file could be big one.

更新前:

<?xml version="1.0"?>
<xml>
  <table>
    <rec id="1" />
    <rec id="2" />
    <rec id="3" />
  </table>
</xml>

更新后:

<?xml version="1.0"?>
<xml>
  <table>
    <rec id="1" />
    <rec id="2" />
    <rec id="10" />
  </table>
</xml>

推荐答案

您没有显示输入文档，但我认为是以下文件，摘录自

You did not show your input document, but I assume it is the following, taken from the xmlstarlet documentation:

<xml>
  <table>
    <rec id="1">
      <numField>123</numField>
      <stringField>String Value</stringField>
    </rec>
    <rec id="2">
      <numField>346</numField>
      <stringField>Text Value</stringField>
    </rec>
    <rec id="3">
      <numField>-23</numField>
      <stringField>stringValue</stringField>
    </rec>
  </table>
</xml>

xmlstarlet修改文件，但是结果发送到标准输出，而不保存在原始文件中.使用另一个选项--inplace修改该文件:

xmlstarlet modifies the file, but the result is sent to standard output, not saved in the original file. Use another option --inplace to modify the file in place:

$ xml ed --inplace -u "/xml/table/rec[@id='3']/@id" -v 5 rec.xml

然后:

$ cat rec.xml
<?xml version="1.0"?>
<xml>
  <table>
    <rec id="1">
      <numField>123</numField>
      <stringField>String Value</stringField>
    </rec>
    <rec id="2">
      <numField>346</numField>
      <stringField>Text Value</stringField>
    </rec>
    <rec id="5">
      <numField>-23</numField>
      <stringField>stringValue</stringField>
    </rec>
  </table>
</xml>

顺便说一句，这个问题似乎提出了与这个问题非常相似的问题

By the way, this question seems to ask something very similar to this question.

编辑:如@npostavs所建议，此选项在编辑帮助中列出:

EDIT: As suggested by @npostavs, this option is listed in the edit help:

$ xml edit --help
...
-L (or --inplace)   - edit file inplace
...

这篇关于如何使用xmlstarlet更新xml文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！