XML转PDF的XSL解析问题：仅显示page标签下首行元素

First off, the issue you're hitting comes down to how your XML is structured right now. Each <page> has <line_number> and <product_code> elements floating directly under it without a wrapping element for each individual line. This makes it impossible for your XSL to reliably loop through each line item—instead, it's only grabbing the first pair it finds.

Step 1: Correct Your XML Structure #

Wrap each line's data in a <line> element (or whatever name you prefer, as long as it's consistent). Here's how your corrected XML should look:

<receipt>
  <order>
    <page>
      <!-- Empty page, nothing to display -->
    </page>
    <page>
      <line>
        <line_number>1</line_number>
        <product_code>S10</product_code>
      </line>
      <line>
        <line_number>2</line_number>
        <product_code>S20</product_code>
      </line>
      <line>
        <line_number>3</line_number>
        <product_code>S30</product_code>
      </line>
    </page>
  </order>
</receipt>

Step 2: Update Your XSL to Iterate Over Lines #

Now, use XSL-FO (the standard for XML-to-PDF conversion) to create a stylesheet that loops through each <page> and then each <line> inside it. Here's a working example:

<?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:template match="/">
    <fo:root>
      <fo:layout-master-set>
        <!-- Define a basic page layout -->
        <fo:simple-page-master master-name="page-layout" page-width="8.5in" page-height="11in">
          <fo:region-body margin="1in"/>
        </fo:simple-page-master>
      </fo:layout-master-set>

      <fo:page-sequence master-reference="page-layout">
        <fo:flow flow-name="xsl-region-body">
          <!-- Process each page in the order -->
          <xsl:for-each select="receipt/order/page">
            <!-- Add a heading for the page (optional) -->
            <fo:block font-size="14pt" font-weight="bold" margin-bottom="10pt">
              Page <xsl:value-of select="position()"/>
            </fo:block>

            <!-- Loop through each line in the current page -->
            <fo:table border="1px solid black" table-layout="fixed" width="100%">
              <fo:table-column column-width="20%"/>
              <fo:table-column column-width="80%"/>
              <fo:table-header>
                <fo:table-row>
                  <fo:table-cell padding="5pt" background-color="#eee">
                    <fo:block font-weight="bold">Line Number</fo:block>
                  </fo:table-cell>
                  <fo:table-cell padding="5pt" background-color="#eee">
                    <fo:block font-weight="bold">Product Code</fo:block>
                  </fo:table-cell>
                </fo:table-row>
              </fo:table-header>
              <fo:table-body>
                <xsl:for-each select="line">
                  <fo:table-row>
                    <fo:table-cell padding="5pt">
                      <fo:block><xsl:value-of select="line_number"/></fo:block>
                    </fo:table-cell>
                    <fo:table-cell padding="5pt">
                      <fo:block><xsl:value-of select="product_code"/></fo:block>
                    </fo:table-cell>
                  </fo:table-row>
                </xsl:for-each>
              </fo:table-body>
            </fo:table>

            <!-- Add a page break after each page (except the last one) -->
            <xsl:if test="position() != last()">
              <fo:block break-after="page"/>
            </xsl:if>
          </xsl:for-each>
        </fo:flow>
      </fo:page-sequence>
    </fo:root>
  </xsl:template>

</xsl:stylesheet>

Step 3: Generate the PDF #

To turn this into a PDF, you'll need an XSL-FO processor like Apache FOP. Run it with a command like:

fop -xml your-corrected.xml -xsl your-stylesheet.xsl -output final-receipt.pdf

This stylesheet will create a separate table for each page, displaying all line items with their line numbers and product codes. The empty page will still appear (as a blank page with the "Page 1" heading), but you can adjust that by adding a check to skip empty pages if needed.

内容的提问来源于stack exchange，提问作者Karthikeyan