Powershell 中的 XML 解析 - 特定值

Question

我正在尝试获取值，我需要检索所有结果标签下的所有 httpurl 和 count

以下是我的示例 XML：

<?xml version='1.0' encoding='UTF-8'?>
<results preview='0'>`enter code here`
<meta>
<fieldOrder>
<field>http_url</field>
<field>count</field>
</fieldOrder>
</meta>
  <result offset='0'>
    <field k='http_url'>
      <value h='1'><text>sample/1</text></value>
    </field>
    <field k='count'>
      <value><text>1</text></value>
    </field>
  </result>
  <result offset='1'>
    <field k='http_url'>
      <value h='1'><text>sample/2</text></value>
    </field>
    <field k='count'>
      <value><text>1</text></value>
    </field>
  </result>
  <result offset='2'>
    <field k='http_url'>
      <value h='1'><text>sample/3</text></value>
    </field>
    <field k='count'>
      <value><text>1</text></value>
    </field>
  </result>
  <result offset='3'>
    <field k='http_url'>
      <value h='1'><text>sample/4</text></value>
    </field>
    <field k='count'>
      <value><text>1</text></value>
    </field>
  </result>
  <result offset='4'>
    <field k='http_url'>
      <value h='1'><text>sample/5</text></value>
    </field>
    <field k='count'>
      <value><text>1</text></value>
    </field>
  </result>
</results>

Answer 1

使用您的示例 xml，您可以执行此操作以获取具有 url 和计数的对象数组：

[xml]$xml = Get-Content -Path 'D:\Test\test.xml' -Raw

# loop through the tags and return an array of PSObjects
# each having two properties: 'http_url' and 'count'
$xml.results.result | ForEach-Object {
    [PsCustomObject] @{
        http_url = ($_.field | Where-Object { $_.k -eq 'http_url' }).value.text
        count    = [int]($_.field | Where-Object { $_.k -eq 'count' }).value.text
    }
}

结果：

http_url count
-------- -----
sample/1     1
sample/2     1
sample/3     1
sample/4     1
sample/5     1

Answer 2

$xmlDoc = [xml]@"
<?xml version="1.0" encoding="UTF-8"?>
<results preview="0">
   'enter code here'
   <meta>
      <fieldOrder>
         <field>http_url</field>
         <field>count</field>
      </fieldOrder>
   </meta>
   <result offset="0">
      <field k="http_url">
         <value h="1">
            <text>sample/1</text>
         </value>
      </field>
      <field k="count">
         <value>
            <text>1</text>
         </value>
      </field>
   </result>
   <result offset="1">
      <field k="http_url">
         <value h="1">
            <text>sample/2</text>
         </value>
      </field>
      <field k="count">
         <value>
            <text>1</text>
         </value>
      </field>
   </result>
   <result offset="2">
      <field k="http_url">
         <value h="1">
            <text>sample/3</text>
         </value>
      </field>
      <field k="count">
         <value>
            <text>1</text>
         </value>
      </field>
   </result>
   <result offset="3">
      <field k="http_url">
         <value h="1">
            <text>sample/4</text>
         </value>
      </field>
      <field k="count">
         <value>
            <text>1</text>
         </value>
      </field>
   </result>
   <result offset="4">
      <field k="http_url">
         <value h="1">
            <text>sample/5</text>
         </value>
      </field>
      <field k="count">
         <value>
            <text>1</text>
         </value>
      </field>
   </result>
</results>
"@

$xmlDoc.SelectNodes("//results/result[field[@k='http_url' or 'count']/value/text]") | ForEach-Object {
    [PSCustomObject]@{
        http_url = $_.SelectSingleNode("field[@k='http_url']/value/text")."#text"
        count = $_.SelectSingleNode("field[@k='count']/value/text")."#text"
    }
}

Answer 3

您可以使用Get-Contet 函数将文件数据检索到字符串。之后，您可以通过[xml] 将字符串转换为 XML 对象。下面是一个使用 Microsoft XML example file 的示例：

> $xmlObject = [xml] (Get-Content .\books.xml)

以下命令将列出所有书籍：

> $xmlObject.catalog.book

id           : bk101
author       : Gambardella, Matthew
title        : XML Developer's Guide
genre        : Computer
price        : 44.95
publish_date : 2000-10-01
description  : An in-depth look at creating applications
                     with XML.

id           : bk102
author       : Ralls, Kim
title        : Midnight Rain
genre        : Fantasy
price        : 5.95
publish_date : 2000-12-16
description  : A former architect battles corporate zombies,
                     an evil sorceress, and her own childhood to become queen
                     of the world.

...

如果你想选择某些属性你可以使用Select-Object:

> $xmlObject.catalog.book | Select-Object id, author

id    author
--    ------
bk101 Gambardella, Matthew
bk102 Ralls, Kim
bk103 Corets, Eva
bk104 Corets, Eva
bk105 Corets, Eva
bk106 Randall, Cynthia
bk107 Thurman, Paula
bk108 Knorr, Stefan
bk109 Kress, Peter
bk110 O'Brien, Tim
bk111 O'Brien, Tim
bk112 Galos, Mike