不确定怎么做这个' sum()'函数是在XML页面中添加所有值,而不是由' if'选择的值。言。
这是XML:
<book>
<title type="non-fiction">Harry Potter and the Philosophers Stone</title>
<author>J.K Rowling</author>
<publisher>Bloomsbury</publisher>
<year>1997</year>
<price>12.99</price>
</book>
<book>
<title type="fiction">The Lord of the Rings</title>
<author>J. R. R. Tolkien</author>
<publisher>George Allen and Unwin</publisher>
<year>1954</year>
<price>39.99</price>
</book>
<book>
<title type="non-fiction">The Right Stuff</title>
<author>Tom Wolfe</author>
<publisher>Farra, Staus and Giroux</publisher>
<year>1979</year>
<price>29.99</price>
</book>
这是XSLT:
<xsl:output
method="html"
indent="yes"
version="4.0"
doctype-public="-//W3C//DTD HTML 4.01//EN"
doctype-system="http://www.w3.org/TR/html4/strict.dtd"/>
<xsl:template match="/library">
<html>
<body>
<xsl:for-each select="book">
<xsl:if test="title[@type='non-fiction']">
<xsl:if test="price<30" >
<p class="title"> <xsl:value-of select="title"/></p>
<p class="author"> <xsl:value-of select="author"/> </p>
<p class="price"> <xsl:value-of select="price"/> </p>
</xsl:if>
</xsl:if>
</xsl:for-each>
</body>
我想添加适用于所有条件的书籍总数。我假设sum函数会这样做,但它会添加所有的书籍,无论它是否通过了&#39; if&#39;语句。
答案 0 :(得分:3)
一种可能性是定义
E.g。
<body>
<xsl:variable name="books" select="book[title[@type='non-fiction']][price<30]" />
<xsl:for-each select="$books">
<p class="title"> <xsl:value-of select="title"/></p>
<p class="author"> <xsl:value-of select="author"/> </p>
<p class="price"> <xsl:value-of select="price"/> </p>
</xsl:for-each>
<p class="total-price"> <xsl:value-of select="sum($books/price)"/> </p>
</body>
答案 1 :(得分:3)
你可以试试这个:
<xsl:template match="/library" >
<html>
<body>
<xsl:variable name="fiction_lt30"
select="book[title[@type='non-fiction'] and price < 30] " />
<xsl:for-each select="$fiction_lt30">
<p class="title"> <xsl:value-of select="title"/></p>
<p class="author"> <xsl:value-of select="author"/> </p>
<p class="price"> <xsl:value-of select="price"/> </p>
</xsl:for-each>
<p>total: <xsl:value-of select="sum($fiction_lt30/price)" /></p>
</body>
</html>
</xsl:template>
答案 2 :(得分:1)
这是一个完整而简短的解决方案:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="/*">
<xsl:variable name="vBooks"
select="book[title[@type='non-fiction'] and not(price >= 30)]"/>
<html>
<body>
<xsl:apply-templates select="$vBooks"/>
<p><strong>Total Cost:</strong><span><xsl:value-of
select="sum($vBooks/price)"/></span></p>
</body>
</html>
</xsl:template>
<xsl:template match="book/*[self::title or self::author or self::price]">
<p class="{name()}"> <xsl:value-of select="."/></p>
</xsl:template>
</xsl:stylesheet>