我正在尝试使用 Apache FOP 使用 XML 数据和 XSL 样式表创建 PDF，但我不断收到以下错误
org.apache.fop.apps.FOPException：
org.apache.fop.fo.ValidationException：
“{http://www.w3.org/1999/XSL/Format http://www.w3.org/1999/XSL/Format}block" 不是以下的有效子项
“fo：根”！ （没有可用的上下文信息）
javax.xml.transform.TransformerException：
org.apache.fop.fo.ValidationException：
“{http://www.w3.org/1999/XSL/Format http://www.w3.org/1999/XSL/Format}block" 不是以下的有效子项
“fo：根”！ （没有可用的上下文信息）
奇怪的是，当我在本地 Windows 计算机上测试它时，它工作正常，但当我尝试在 Debian 服务器上执行相同操作时，我收到此错误。
我正在命令行上执行以下操作
fop -c fop_config.xml -xml /tmp/fop4IwJKZ -xsl stylesheet.xsl -pdf pdf.pdf
下面是我的 XML：
<?xml version="1.0" encoding="UTF-8"?>
<report>
<heading>Heading</heading>
<mailersent>18/06/2013 14:23</mailersent>
<reportgenerated>18/06/2013 17:26</reportgenerated>
<portrait>
<title>Summary</title>
<graph>graphs/graph1.png</graph>
<stats>
<stat>
<value>16.67%</value>
<text>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor</text>
</stat>
<stat>
<value>2.25%</value>
<text>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor</text>
</stat>
<stat>
<value>13.49%</value>
<text>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor through</text>
</stat>
<stat>
<value>8.99%</value>
<text>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor</text>
</stat>
</stats>
</portrait>
</report>
样式表：
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="node()|@*">
<xsl:apply-templates select="node()|@*"/>
</xsl:template>
<xsl:template match="/report">
<fo:root>
<fo:layout-master-set>
<fo:simple-page-master master-name="portraitLayout" page-height="29.7cm" page-width="21.0cm" margin="1cm">
<fo:region-body margin-bottom="1cm"/>
<fo:region-after extent="1cm"/>
</fo:simple-page-master>
<fo:simple-page-master master-name="landscapeLayout" page-height="21cm" page-width="30cm" margin="1cm">
<fo:region-body margin-bottom="1cm"/>
<fo:region-after extent="1cm"/>
</fo:simple-page-master>
</fo:layout-master-set>
<fo:page-sequence master-reference="portraitLayout">
<fo:flow flow-name="xsl-region-body">
<xsl:call-template name="heading"/>
</fo:flow>
</fo:page-sequence>
<fo:page-sequence master-reference="portraitLayout">
<fo:flow flow-name="xsl-region-body">
<xsl:call-template name="genTOC"/>
</fo:flow>
</fo:page-sequence>
<xsl:apply-templates/>
</fo:root>
</xsl:template>
<xsl:template name="genTOC">
<fo:block break-before='page'>
<fo:block margin-bottom="1cm" font-size="16pt" font-weight="bold" text-align="center">Contents</fo:block>
<xsl:for-each select="//portrait|//landscape">
<fo:block text-align-last="justify">
<fo:basic-link internal-destination="{generate-id(.)}">
<xsl:value-of select="title" />
<fo:leader leader-pattern="dots" />
<fo:page-number-citation ref-id="{generate-id(.)}" />
</fo:basic-link>
</fo:block>
</xsl:for-each>
</fo:block>
</xsl:template>
<xsl:template match="portrait">
<fo:page-sequence master-reference="portraitLayout" id="{generate-id(.)}">
<fo:static-content flow-name="xsl-region-after">
<fo:block font-size="8pt" text-align="center" border-top-color="#000000" border-top-style="solid" border-top-width=".3mm" padding-top="0.2cm">
Page <fo:page-number/> of 9
</fo:block>
</fo:static-content>
<fo:flow flow-name="xsl-region-body">
<xsl:apply-templates/>
</fo:flow>
</fo:page-sequence>
</xsl:template>
<xsl:template match="landscape">
<fo:page-sequence master-reference="landscapeLayout" id="{generate-id(.)}">
<fo:static-content flow-name="xsl-region-after">
<fo:block font-size="8pt" text-align="center" border-top-color="#000000" border-top-style="solid" border-top-width=".3mm" padding-top="0.2cm">
Page <fo:page-number/> of 9
</fo:block>
</fo:static-content>
<fo:flow flow-name="xsl-region-body">
<xsl:apply-templates/>
</fo:flow>
</fo:page-sequence>
</xsl:template>
<xsl:template name="heading">
<fo:block margin-top="10cm" font-size="21pt" font-weight="bold" text-align="center">
<xsl:value-of select="heading"/>
</fo:block>
<fo:block margin-top="0.3cm" font-size="16pt" text-align="center">
<xsl:text>Mailer sent: </xsl:text>
<xsl:value-of select="mailersent"/>
</fo:block>
<fo:block margin-top="0.3cm" font-size="16pt" text-align="center">
<xsl:text>Report generated: </xsl:text>
<xsl:value-of select="reportgenerated"/>
</fo:block>
</xsl:template>
<xsl:template match="title">
<fo:block margin-bottom="0.5cm" border-bottom-color="#000000" border-bottom-style="solid" border-bottom-width=".5mm" font-size="20pt">
<xsl:value-of select="."/>
</fo:block>
</xsl:template>
<xsl:template match="graph">
<fo:block margin-bottom="0.5cm" border-color="#d8d8d8" border-style="solid" border-width=".3mm" font-size="10pt">
<xsl:variable name="graphimage">
<xsl:value-of select="."/>
</xsl:variable>
<fo:external-graphic src="{$graphimage}" content-height="scale-to-fit" content-width="16cm" scaling="non-uniform"/>
</fo:block>
</xsl:template>
<xsl:template match="svggraph">
<fo:block margin-bottom="0.5cm" border-color="#d8d8d8" border-style="solid" border-width=".3mm" font-size="10pt">
<fo:instream-foreign-object xmlns:svg="http://www.w3.org/2000/svg" content-width="19cm" content-height="5cm">
<svg:svg width="25" height="25">
<svg:g style="fill:red; stroke:#000000">
<svg:rect x="0" y="0" width="15" height="15"/>
<svg:rect x="5" y="5" width="15" height="15"/>
</svg:g>
</svg:svg>
</fo:instream-foreign-object>
</fo:block>
</xsl:template>
<xsl:template match="stats">
<xsl:for-each select="stat">
<fo:block margin-bottom="0.5cm" font-size="10pt">
<fo:inline font-weight="bold" font-size="12pt">
<xsl:value-of select="value"/>
</fo:inline>
<xsl:text> </xsl:text>
<xsl:value-of select="text"/>
</fo:block>
</xsl:for-each>
</xsl:template>
<xsl:template match="table">
<fo:block>
<fo:table margin-bottom="0.5cm" border-collapse="separate" border-color="#d8d8d8" border-style="solid" border-width=".3mm" table-layout="fixed" width="100%" font-size="10pt">
<xsl:for-each select="thead/tr/th">
<xsl:choose>
<xsl:when test="width">
<xsl:variable name="columnwidth">
<xsl:value-of select="width" />
</xsl:variable>
<fo:table-column column-width="{$columnwidth}"/>
</xsl:when>
<xsl:otherwise>
<fo:table-column/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
<fo:table-header background-color="#ededed">
<xsl:for-each select="thead/tr/th">
<fo:table-cell padding-top="5pt" padding-bottom="5pt" padding-left="3pt" padding-right="3pt">
<fo:block font-weight="bold">
<xsl:value-of select="heading"/>
</fo:block>
</fo:table-cell>
</xsl:for-each>
</fo:table-header>
<fo:table-body>
<xsl:for-each select="tbody/tr">
<xsl:variable name="row-background">
<xsl:choose>
<xsl:when test="position() mod 2 = 0">#f8f8f8</xsl:when>
<xsl:otherwise>#ffffff</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<fo:table-row background-color="{$row-background}">
<xsl:for-each select="td">
<fo:table-cell padding-top="5pt" padding-bottom="5pt" padding-left="3pt" padding-right="3pt">
<fo:block>
<xsl:value-of select="."/>
</fo:block>
</fo:table-cell>
</xsl:for-each>
</fo:table-row>
</xsl:for-each>
</fo:table-body>
</fo:table>
</fo:block>
</xsl:template>
<xsl:template match="text">
<fo:block font-size="10pt">
<xsl:value-of select="."/>
</fo:block>
</xsl:template>
</xsl:stylesheet>
更新：我检查了两台机器上的 XSLT 进程，它们是相同的。我还将两台机器上的 XML + XSL 转换为 XLS:FO，并且两个文件是相同的。
