XSL 1.0:将文本值更改为日期

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:template match="/">
    <xsl:variable name="dateString" select="'2022-01-01'" /> <!-- 替换为你的文本值 -->
    <xsl:variable name="year" select="substring($dateString, 1, 4)" />
    <xsl:variable name="month" select="substring($dateString, 6, 2)" />
    <xsl:variable name="day" select="substring($dateString, 9, 2)" />
    <xsl:value-of select="concat($year, '-', $month, '-', $day)" />
  </xsl:template>
</xsl:stylesheet>