所以我需要像这样显示Subtotal和Grand Total：
但是我得到了这个：
这似乎与for循环有关，但我现在还不完全确定。它在每个标题下显示子总数。
我在这里做错了什么？ 我已经在下面包含了我的XSL和XML代码。
XSL
<?xml version="1.0" encoding="UTF-8" ?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
<xsl:output method="html" doctype-public="XSLT-compat" omit-xml-declaration="yes" encoding="UTF-8" indent="yes" />
<xsl:template match="catalog">
<html>
<head>
<title>Books Catalog by Author</title>
</head>
<body>
<h1>Books Catalog by Author</h1>
<table border ="1" cellpadding ="5">
<xsl:for-each-group select="book" group-by="author">
<xsl:sort select="current-grouping-key()" />
<tr bgcolor="#ef9f37">
<td colspan="4">Author:
<xsl:value-of select="current-grouping-key()" />
</td>
</tr>
<tr>
<td>ID</td><td>Title</td><td>Genre</td><td>Price</td>
</tr>
<xsl:for-each select="current-group()">
<tr>
<td><xsl:value-of select="@id"/></td>
<td><xsl:value-of select="title"/></td>
<td><xsl:value-of select="genre"/></td>
<td><xsl:value-of select="price"/></td>
</tr>
</xsl:for-each>
</xsl:for-each-group>
<tr>
<td colspan="3" align="right">Sub Total:</td>
</tr>
</table>
</body>
</html>
</xsl:template>
</xsl:transform>
XML
<?xml version="1.0" encoding="UTF-8"?>
<catalog>
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications
with XML.</description>
</book>
<book id="bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-12-16</publish_date>
<description>A former architect battles corporate zombies,
an evil sorceress, and her own childhood to become queen
of the world.</description>
</book>
<book id="bk103">
<author>Corets, Eva</author>
<title>Maeve Ascendant</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-11-17</publish_date>
<description>After the collapse of a nanotechnology
society in England, the young survivors lay the
foundation for a new society.</description>
</book>
<book id="bk104">
<author>Corets, Eva</author>
<title>Oberon's Legacy</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-03-10</publish_date>
<description>In post-apocalypse England, the mysterious
agent known only as Oberon helps to create a new life
for the inhabitants of London. Sequel to Maeve
Ascendant.</description>
</book>
<book id="bk105">
<author>Corets, Eva</author>
<title>The Sundered Grail</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-09-10</publish_date>
<description>The two daughters of Maeve, half-sisters,
battle one another for control of England. Sequel to
Oberon's Legacy.</description>
</book>
<book id="bk106">
<author>Randall, Cynthia</author>
<title>Lover Birds</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-09-02</publish_date>
<description>When Carla meets Paul at an ornithology
conference, tempers fly as feathers get ruffled.</description>
</book>
<book id="bk107">
<author>Thurman, Paula</author>
<title>Splish Splash</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-11-02</publish_date>
<description>A deep sea diver finds true love twenty
thousand leagues beneath the sea.</description>
</book>
<book id="bk108">
<author>Knorr, Stefan</author>
<title>Creepy Crawlies</title>
<genre>Horror</genre>
<price>4.95</price>
<publish_date>2000-12-06</publish_date>
<description>An anthology of horror stories about roaches,
centipedes, scorpions and other insects.</description>
</book>
<book id="bk109">
<author>Kress, Peter</author>
<title>Paradox Lost</title>
<genre>Science Fiction</genre>
<price>6.95</price>
<publish_date>2000-11-02</publish_date>
<description>After an inadvertant trip through a Heisenberg
Uncertainty Device, James Salway discovers the problems
of being quantum.</description>
</book>
<book id="bk110">
<author>O'Brien, Tim</author>
<title>Microsoft .NET: The Programming Bible</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-09</publish_date>
<description>Microsoft's .NET initiative is explored in
detail in this deep programmer's reference.</description>
</book>
<book id="bk111">
<author>O'Brien, Tim</author>
<title>MSXML3: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-01</publish_date>
<description>The Microsoft MSXML3 parser is covered in
detail, with attention to XML DOM interfaces, XSLT processing,
SAX and more.</description>
</book>
<book id="bk212">
<author>Galos, Mike</author>
<title>Visual Studio 7: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>49.95</price>
<publish_date>2001-04-16</publish_date>
<description>Microsoft Visual Studio 7 is explored in depth,
looking at how Visual Basic, Visual C++, C#, and ASP+ are
integrated into a comprehensive development
environment.</description>
</book>
</catalog>
答案 0 :(得分：1)
您可以使用sum函数简单地将节点的值与format-number相加，以将结果显示为2位小数。
试试这个XSLT
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
<xsl:output method="html" doctype-public="XSLT-compat" omit-xml-declaration="yes" encoding="UTF-8" indent="yes" />
<xsl:template match="catalog">
<html>
<head>
<title>Books Catalog by Author</title>
</head>
<body>
<h1>Books Catalog by Author</h1>
<table border ="1" cellpadding ="5">
<xsl:for-each-group select="book" group-by="author">
<xsl:sort select="current-grouping-key()" />
<tr bgcolor="#ef9f37">
<td colspan="4">Author:
<xsl:value-of select="current-grouping-key()" />
</td>
</tr>
<tr>
<td>ID</td><td>Title</td><td>Genre</td><td>Price</td>
</tr>
<xsl:for-each select="current-group()">
<tr>
<td><xsl:value-of select="@id"/></td>
<td><xsl:value-of select="title"/></td>
<td><xsl:value-of select="genre"/></td>
<td><xsl:value-of select="price"/></td>
</tr>
</xsl:for-each>
<tr>
<td colspan="3" align="right">Sub Total:</td>
<td><xsl:value-of select="format-number(sum(current-group()/price), '0.00')" /></td>
</tr>
</xsl:for-each-group>
<tr>
<td colspan="3" align="right">Sub Total:</td>
<td><xsl:value-of select="format-number(sum(book/price), '0.00')" /></td>
</tr>
</table>
</body>
</html>
</xsl:template>
</xsl:transform>