我试图使用XMLTasks来替换xml文件中的一些值，但由于没有匹配，它一直失败。使用其他工具，它表明我的xpath是正确的，但我无法找出问题所在。
这里是我正在搜索的文件：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project xmlns="http://www.netbeans.org/ns/project/1">
<type>org.netbeans.modules.apisupport.project</type>
<configuration>
<data xmlns="http://www.netbeans.org/ns/nb-module-project/3">
<code-name-base>simple.server.extension.cardgame</code-name-base>
<suite-component/>
<module-dependencies>
<dependency>
<code-name-base>marauroa.lib</code-name-base>
<build-prerequisite/>
<compile-dependency/>
<run-dependency>
<release-version>3</release-version>
<specification-version>8</specification-version>
</run-dependency>
</dependency>
<dependency>
<code-name-base>simple.server.lib</code-name-base>
<build-prerequisite/>
<compile-dependency/>
<run-dependency>
<release-version>0-1</release-version>
<specification-version>0.2</specification-version>
</run-dependency>
</dependency>
</module-dependencies>
<public-packages>
<package>dreamer.card.game</package>
<package>dreamer.card.game.model.events</package>
<package>dreamer.card.game.price</package>
<package>dreamer.card.game.storage</package>
<package>simple.server.extension</package>
<package>simple.server.extension.card</package>
</public-packages>
<class-path-extension>
<runtime-relative-path>ext/extension/x.jar</runtime-relative-path>
<binary-origin>../../Simple Marauroa Java/Card Game Extension/dist/x.jar</binary-origin>
</class-path-extension>
<class-path-extension>
<runtime-relative-path>ext/extension/y.jar</runtime-relative-path>
<binary-origin>../../Simple Marauroa Java/Card Game interface/dist/y.jar</binary-origin>
</class-path-extension>
</data>
</configuration>
</project>
这是我正在使用的路径表达式：
/project/configuration/data/class-path-extension[1]/runtime-relative-path/text()
以下是我尝试运行的任务的相关部分：
<target name="s" depends="-define-xmltasks">
<propertyselector property="subprojects" match="original.project.dir(.*)" select="1"/>
<for list="${subprojects}" param="subproject">
<sequential>
<xmltask source="nbproject/project.xml" dest="nbproject/project.xml" failWithoutMatch="true">
<replace path="/project/configuration/data/class-path-extension[@{subproject}]/runtime-relative-path/text()"
withText="ext/extension/${extension-lib@{subproject}.dist.jar}"/>
<replace path="/project/configuration/data/class-path-extension[@{subproject}]/binary-origin/text()"
withText="${original.project.dir@{subproject}}/dist/${extension-lib@{subproject}.dist.jar}"/>
</xmltask>
</sequential>
</for>
</target>
@｛subproject｝解析为数字，并已尝试将其更改为数字，但效果相同。知道吗？
这是我正在使用的路径表达式：
/project/configuration/data/class-path-extension[1]/runtime-relative-path/text()
处理非空（默认）命名空间中未固定名称的一种方法是将名称指定为谓词。
下面是一个用这种风格编写的XPath表达式，用于选择所需的节点：
/*[name()='project']
/*[name()='configuration']
/*[name()='data']
/*[name()='class-path-extension'][1]
/*[name()='runtime-relative-path']
/text()
基于XSLT的验证：
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:template match="/">
<xsl:copy-of select=
"/*[name()='project']
/*[name()='configuration']
/*[name()='data']
/*[name()='class-path-extension'][1]
/*[name()='runtime-relative-path']
/text()
"/>
</xsl:template>
</xsl:stylesheet>
当此转换应用于所提供的XML文档时：
<project xmlns="http://www.netbeans.org/ns/project/1">
<type>org.netbeans.modules.apisupport.project</type>
<configuration>
<data xmlns="http://www.netbeans.org/ns/nb-module-project/3">
<code-name-base>simple.server.extension.cardgame</code-name-base>
<suite-component/>
<module-dependencies>
<dependency>
<code-name-base>marauroa.lib</code-name-base>
<build-prerequisite/>
<compile-dependency/>
<run-dependency>
<release-version>3</release-version>
<specification-version>8</specification-version>
</run-dependency>
</dependency>
<dependency>
<code-name-base>simple.server.lib</code-name-base>
<build-prerequisite/>
<compile-dependency/>
<run-dependency>
<release-version>0-1</release-version>
<specification-version>0.2</specification-version>
</run-dependency>
</dependency>
</module-dependencies>
<public-packages>
<package>dreamer.card.game</package>
<package>dreamer.card.game.model.events</package>
<package>dreamer.card.game.price</package>
<package>dreamer.card.game.storage</package>
<package>simple.server.extension</package>
<package>simple.server.extension.card</package>
</public-packages>
<class-path-extension>
<runtime-relative-path>ext/extension/x.jar</runtime-relative-path>
<binary-origin>../../Simple Marauroa Java/Card Game Extension/dist/x.jar</binary-origin>
</class-path-extension>
<class-path-extension>
<runtime-relative-path>ext/extension/y.jar</runtime-relative-path>
<binary-origin>../../Simple Marauroa Java/Card Game interface/dist/y.jar</binary-origin>
</class-path-extension>
</data>
</configuration>
</project>
计算XPath表达式，并将所选节点复制到输出：
ext/extension/x.jar
注意：对于XPath表达式的增量构建和验证，可以使用诸如XPath可视化工具之类的工具。这个工具已经帮助成千上万的人以有趣的方式学习XPath。
问题是project和data元素是在不同的命名空间中声明的。您可以通过以下方式在节点谓词中使用local-name()属性：
/*[local-name() = 'project'] ...
您也可以使用namespace-uri属性指定名称空间：
/*[local-name() = 'project' and namespace-uri() = 'http://www.netbeans.org/ns/project/1'] ...
等等。