Question

我有一个巨大的XML文件，看起来像这样（但要大得多）：

<?xml version="1.0" encoding="UTF-8"?>
<suite id="1" name="SuiteName">
  <displayNameKey>something</displayNameKey>
  <displayName>something</displayName>
  <application id="2" name="Manager">
    <displayNameKey>appName</displayNameKey>
    <displayName>appName</displayName>
    <category id="12" name="navigation">
      <displayNameKey>managerNavigation</displayNameKey>
      <displayName>managerNavigation</displayName>
      <description>mgr_navigation</description>
      <property id="13" name="httpPort" type="integer_property" width="40">
        <displayNameKey>managerHttpPort</displayNameKey>
        <displayName>managerHttpPort</displayName>
        <value>80</value>
      </property>
      <property id="14" name="httpsPort" type="integer_property" width="40">
        <displayNameKey>managerHttpsPort</displayNameKey>
        <displayName>managerHttpsPort</displayName>
        <value>443</value>
      </property>
      <property id="15" name="welcomePageURI" type="url_property" width="40" hidden="true">
        <displayNameKey>welcomePageURI</displayNameKey>
        <displayName>welcomePageURI</displayName>
        <value>jsp/index.jsp</value>
      </property>
      <property id="16" name="serverURL" type="url_property" width="40">
        <displayNameKey>serverURL</displayNameKey>
        <displayName>serverURL</displayName>
        <value>somevalue</value>
      </property>
    </category>
    <category id="17" name="datafiltering">
      <displayNameKey>managerDataFiltering</displayNameKey>
      <displayName>managerDataFiltering</displayName>
      <description>mgr_data_filtering</description>
      <property id="18" name="defaultTableName" type="string_property" width="40">
        <displayNameKey>defaultTableName</displayNameKey>
        <displayName>defaultTableName</displayName>
      </property>
      <property id="19" name="defaultAudienceName" type="string_property" width="40">
        <displayNameKey>defaultAudienceName</displayNameKey>
        <displayName>defaultAudienceName</displayName>
      </property>
    </category>
  </application>
</suite>

我需要做的是为每个属性生成一个XPath表达式，但不使用位置或ID，而是使用name属性。也就是说，对于上面的文件，所需的输出类似于：

/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="httpPort"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="httpsPort"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="welcomePageURI"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="serverURL"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="datafiltering"]/property[@name="defaultTableName"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="datafiltering"]/property[@name="defaultAudienceName"]

我找到的所有XPath生成器只使用name属性或位置生成XPath，例如/ suite [0] / application [0] / category [1] / ...

您能否向我推荐一种如何为我的文件中的所有属性生成XPath的方法？还有一件事 - 结构是可变的 - 可以有0到N个嵌套类别，例如

/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="cat1"]/category[@name="cat2"]/category[@name="cat3"]/property[@name="property1"]
/suite[@name="SuiteName"]/application[@name="Manager"]/property[@name="property2"]

Answer 1

你可以在php中这样做：

<?php

$xml = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<suite id="1" name="SuiteName">
  <displayNameKey>something</displayNameKey>
  <displayName>something</displayName>
  <application id="2" name="Manager">
    <displayNameKey>appName</displayNameKey>
    <displayName>appName</displayName>
    <category id="12" name="navigation">
      <displayNameKey>managerNavigation</displayNameKey>
      <displayName>managerNavigation</displayName>
      <description>mgr_navigation</description>
      <property id="13" name="httpPort" type="integer_property" width="40">
        <displayNameKey>managerHttpPort</displayNameKey>
        <displayName>managerHttpPort</displayName>
        <value>80</value>
      </property>
      <property id="14" name="httpsPort" type="integer_property" width="40">
        <displayNameKey>managerHttpsPort</displayNameKey>
        <displayName>managerHttpsPort</displayName>
        <value>443</value>
      </property>
      <property id="15" name="welcomePageURI" type="url_property" width="40" hidden="true">
        <displayNameKey>welcomePageURI</displayNameKey>
        <displayName>welcomePageURI</displayName>
        <value>jsp/index.jsp</value>
      </property>
      <property id="16" name="serverURL" type="url_property" width="40">
        <displayNameKey>serverURL</displayNameKey>
        <displayName>serverURL</displayName>
        <value>somevalue</value>
      </property>
    </category>
    <category id="17" name="datafiltering">
      <displayNameKey>managerDataFiltering</displayNameKey>
      <displayName>managerDataFiltering</displayName>
      <description>mgr_data_filtering</description>
      <property id="18" name="defaultTableName" type="string_property" width="40">
        <displayNameKey>defaultTableName</displayNameKey>
        <displayName>defaultTableName</displayName>
      </property>
      <property id="19" name="defaultAudienceName" type="string_property" width="40">
        <displayNameKey>defaultAudienceName</displayNameKey>
        <displayName>defaultAudienceName</displayName>
      </property>
    </category>
  </application>
</suite>
XML;


function genXpath($xml, $att, $current = null)
{
    if($current == null) $current = '/*';
    $new = $current.'[@'.$att.']';

    $result = $xml->xpath($new);

    if($current[strlen($current) - 1] == '*')
    {
        $current = substr($current, 0, strlen($current) - 1);
    }

    if(count($result))
    {
        foreach($result as $node)
        {
            $prev = $current;
            $current .= $node->getName().'[@'.$att.'="'.$node->attributes()->$att.'"]/*';
            genXpath($xml, $att, $current);
            $current = $prev;
        }

    }
    else
    {
        $current = substr($current, 0, strlen($current) - 1);
        echo $current.'<br />';
    }

}

// how to use
$xml = new SimpleXMLElement($xml);
genXpath($xml, "name");

?>

输出如下内容：

/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="httpPort"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="httpsPort"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="welcomePageURI"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="serverURL"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="datafiltering"]/property[@name="defaultTableName"]
/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="datafiltering"]/property[@name="defaultAudienceName"]

我希望它有所帮助。您还可以设置所需的属性名称。

函数本身及其使用是：

<?php

function genXpath($xml, $att, $current = null)
{
    if($current == null) $current = '/*';
    $new = $current.'[@'.$att.']';

    $result = $xml->xpath($new);

    if($current[strlen($current) - 1] == '*')
    {
        $current = substr($current, 0, strlen($current) - 1);
    }

    if(count($result))
    {
        foreach($result as $node)
        {
            $prev = $current;
            $current .= $node->getName().'[@'.$att.'="'.$node->attributes()->$att.'"]/*';
            genXpath($xml, $att, $current);
            $current = $prev;
        }

    }
    else
    {
        $current = substr($current, 0, strlen($current) - 1);
        echo $current.'<br />';
    }

}

// how to use
$xml = "your xml string"; // you can read it from a file   
$xml = new SimpleXMLElement($xml);
genXpath($xml, "name");

算法在这里非常重要，您可以轻松地将其移植到任何其他编程语言中。所需要的只是支持xpath，并改变从xpath查询给出的结果中获取信息的方式。

最好的问候，
盲

Answer 2

这可能是最短和最简单的（没有命名模板，根本没有明确的条件指令，没有xsl:for-each而且没有使用//）实现所需处理的XSLT转换：

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="text"/> <xsl:template match="property"> <xsl:apply-templates select="ancestor::*" mode="build"/> <xsl:value-of select= "concat('/property[@name="', @name, '"]')"/> <xsl:text>
</xsl:text> </xsl:template> <xsl:template match="*" mode="build"> <xsl:value-of select= "concat('/',name(),'[@name="', @name, '"]')"/> </xsl:template> <xsl:template match="text()"/> </xsl:stylesheet>

将此转换应用于提供的XML文档：

<?xml version="1.0" encoding="UTF-8"?> <suite id="1" name="SuiteName"> <displayNameKey>something</displayNameKey> <displayName>something</displayName> <application id="2" name="Manager"> <displayNameKey>appName</displayNameKey> <displayName>appName</displayName> <category id="12" name="navigation"> <displayNameKey>managerNavigation</displayNameKey> <displayName>managerNavigation</displayName> <description>mgr_navigation</description> <property id="13" name="httpPort" type="integer_property" width="40"> <displayNameKey>managerHttpPort</displayNameKey> <displayName>managerHttpPort</displayName> <value>80</value> </property> <property id="14" name="httpsPort" type="integer_property" width="40"> <displayNameKey>managerHttpsPort</displayNameKey> <displayName>managerHttpsPort</displayName> <value>443</value> </property> <property id="15" name="welcomePageURI" type="url_property" width="40" hidden="true"> <displayNameKey>welcomePageURI</displayNameKey> <displayName>welcomePageURI</displayName> <value>jsp/index.jsp</value> </property> <property id="16" name="serverURL" type="url_property" width="40"> <displayNameKey>serverURL</displayNameKey> <displayName>serverURL</displayName> <value>somevalue</value> </property> </category> <category id="17" name="datafiltering"> <displayNameKey>managerDataFiltering</displayNameKey> <displayName>managerDataFiltering</displayName> <description>mgr_data_filtering</description> <property id="18" name="defaultTableName" type="string_property" width="40"> <displayNameKey>defaultTableName</displayNameKey> <displayName>defaultTableName</displayName> </property> <property id="19" name="defaultAudienceName" type="string_property" width="40"> <displayNameKey>defaultAudienceName</displayNameKey> <displayName>defaultAudienceName</displayName> </property> </category> </application> </suite>

产生了想要的正确结果：

/suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="httpPort"] /suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="httpsPort"] /suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="welcomePageURI"] /suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="navigation"]/property[@name="serverURL"] /suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="datafiltering"]/property[@name="defaultTableName"] /suite[@name="SuiteName"]/application[@name="Manager"]/category[@name="datafiltering"]/property[@name="defaultAudienceName"]

Answer 3

我会做这样的事情：

<xsl:transform version="2.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="text" />
    <xsl:template match="/">
    <xsl:for-each select="//property">
        <xsl:call-template name="add-parent-xpath"/>
        <xsl:text>
</xsl:text>
    </xsl:for-each>
    </xsl:template>

    <xsl:template name="add-parent-xpath">
        <xsl:if test="name(.) != 'suite'">
            <xsl:for-each select="..">
                <xsl:call-template name="add-parent-xpath" />
            </xsl:for-each>
        </xsl:if>
        <xsl:value-of select="concat('/', name(.), '[@name=&quot;', @name, '&quot;]')"/>
    </xsl:template>

</xsl:transform>

首先选择每个属性节点，然后递归地爬回到套件节点。当递归解开时，它会发出xpath来选择该节点，因此你得到套件的xpath，然后是下一级，依此类推，一直回到属性。

使用自定义属性（在本例中为name）为XML中的每个节点生成XPath

3 个答案: