嵌套for-xml中的循环

时间:2012-10-15 22:38:38

标签: xml xslt

我是XML的新手。我正在尝试创建包含项目详细信息的表和另一个表,以包含选项列表中每个订单的客户详细信息。看起来它应该是直截了当的,但我只是按订单数量重复所有订单上的所有项目列表。我究竟做错了什么? (下面的XSL代码......)

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl = "http://www.w3.org/1999/XSL/Transform">

<xsl:output method="html" doctype-system="about:legacy-compat"/>
<xsl:template match="/">

<html xmlns = "http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8"/>
<link rel="stylesheet" type="css/text" href="style.css"/>
<title>Orders</title>
</head>

<body>
<xsl:for-each select="//order">
<table>
<caption><h3>Order Information</h3></caption>
<thead>
<th align="left">Item Id</th>
<th align="left">Item Description</th>
<th align="left">Quantity</th>
<th align="left">Price</th>
</thead>
<xsl:for-each select="//item">
<tr>
<td align="left"><xsl:value-of select="itemId"/></td>
<td align="left"><xsl:value-of select="itemName"/></td>
<td align="left"><xsl:value-of select="quantity"/></td>
<td align="left"><xsl:value-of select="price"/></td>
</tr>
</xsl:for-each>
</table>
<table>
<caption><h3>Customer Information</h3></caption>
<thead>
<th align="left">Customer Name</th>
<th align="left">Street</th>
<th align="left">City</th>
</thead>
<xsl:for-each select="//item">
<tr>
<td align="left"><xsl:value-of select="customerName"/></td>
<td align="left"><xsl:value-of select="street"/></td>
<td align="left"><xsl:value-of select="city"/></td>
</tr>
</xsl:for-each>
</table>
</xsl:for-each>
</body>
</html>

</xsl:template>
</xsl:stylesheet>

这是XML:

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet type="text/xsl" href="Orders.xsl"?>

<orders xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Orders.xsd">
<order>
<orderId>123</orderId>
<items>
<item>
<itemId>001</itemId>
<itemName>Nylon Rope</itemName>
<quantity>1</quantity>
<price>3.50</price>
</item>
<item>
<itemId>002</itemId>
<itemName>Shovel</itemName>
<quantity>1</quantity>
<price>24.95</price>
</item>
</items>
<customerAddress>
<customerName>Larry Murphy</customerName>
<street>Shallowgrave Lane</street>
<city>Ballymore Eustace, Co. Kildare</city>
</customerAddress>
</order>
<order>
<orderId>124</orderId>
<items>
<item>
<itemId>001</itemId>
<itemName>Whiskey</itemName>
<quantity>1</quantity>
<price>18.50</price>
</item>
<item>
<itemId>002</itemId>
<itemName>Shotgun</itemName>
<quantity>1</quantity>
<price>225</price>
</item>
<item>
<itemId>003</itemId>
<itemName>Cartridge</itemName>
<quantity>1</quantity>
<price>1.85</price>
</item>
</items>
<customerAddress>
<customerName>Enda Kenny</customerName>
<street>A Avenue</street>
<city>Castlebar, Co. Mayo</city>
</customerAddress>
</order>
</orders>

相关XSD:

<?xml version="1.0" encoding="utf-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<xsd:element name="orders">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="unbounded" minOccurs="1" ref="order"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

<xsd:element name="order">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="unbounded" minOccurs="1" ref="items"/>
<xsd:element maxOccurs="1" minOccurs="1" ref="customerAddress"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

<xsd:element name="items">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="unbounded" minOccurs="1" ref="item"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

<xsd:element name="item">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="unbounded" minOccurs="1" ref="itemId"/>
<xsd:element maxOccurs="unbounded" minOccurs="1" ref="itemName"/>
<xsd:element maxOccurs="unbounded" minOccurs="1" ref="quantity"/>
<xsd:element maxoccurs="unbounded" minOccurs="1" ref="price"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

<xsd:element name="customerAddress">
<xsd:complexType>
<xsd:sequence>
<xsd:element maxOccurs="1" minOccurs="1" ref="customerName"/>
<xsd:element maxOccurs="1" minOccurs="1" ref="street"/>
<xsd:element maxOccurs="1" minOccurs="1" ref="city"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="itemId" type="xsd:string"/>
<xsd:element name="itemName" type="xsd:string"/>
<xsd:element name="quantity" type="xsd:int"/>
<xsd:element name="price" type="xsd:double"/>
<xsd:element name="customerName" type="xsd:string"/>
<xsd:element name="street" type="xsd:string"/>
<xsd:element name="city" type="xsd:string"/>

</xsd:schema>

3 个答案:

答案 0 :(得分:2)

<xsl:for-each select="//order">

选择文档中的所有<order>标记。

<xsl:for-each select="//item">

同样会选择文档中的所有<item>标记。这就是你得到结果的原因。

您需要的是

<xsl:for-each select=".//item">

解释是//本身仅仅意味着根元素的descendant-or-self。另一方面,.//表示当前元素的后代或自我(在本例中为<order>元素),因此现在您的项目将被正确分组。

您可以(并且确实应该)阅读有关此here的更多信息,理解轴和上下文节点对于理解XSLT / XPath如何工作至关重要,并且可以为您节省很多痛苦。

答案 1 :(得分:1)

不要使用// - 这样您总是从xml文档中选择所有元素,而不是仅与上下文节点相关的元素。

答案 2 :(得分:0)

尝试这样的事情(未经测试,也可能用模板/应用模板替换两个内部循环):

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="html" doctype-system="about:legacy-compat" />
    <xsl:template match="/">
        <html xmlns="http://www.w3.org/1999/xhtml">
            <head>
                <meta charset="utf-8" />
                <link rel="stylesheet" type="css/text" href="style.css" />
                <title>Orders</title>
            </head>

            <body>
                <xsl:apply-templates select="//order" />
            </body>
        </html>
    </xsl:template>
    <xsl:template match="//order">
        <table>
            <caption>
                <h3>Order Information</h3>
            </caption>
            <thead>
                <th align="left">Item Id</th>
                <th align="left">Item Description</th>
                <th align="left">Quantity</th>
                <th align="left">Price</th>
            </thead>
            <xsl:for-each select="//item">
                <tr>
                    <td align="left">
                        <xsl:value-of select="itemId" />
                    </td>
                    <td align="left">
                        <xsl:value-of select="itemName" />
                    </td>
                    <td align="left">
                        <xsl:value-of select="quantity" />
                    </td>
                    <td align="left">
                        <xsl:value-of select="price" />
                    </td>
                </tr>
            </xsl:for-each>
        </table>
        <table>
            <caption>
                <h3>Customer Information</h3>
            </caption>
            <thead>
                <th align="left">Customer Name</th>
                <th align="left">Street</th>
                <th align="left">City</th>
            </thead>
            <xsl:for-each select="//item">
                <tr>
                    <td align="left">
                        <xsl:value-of select="customerName" />
                    </td>
                    <td align="left">
                        <xsl:value-of select="street" />
                    </td>
                    <td align="left">
                        <xsl:value-of select="city" />
                    </td>
                </tr>
            </xsl:for-each>
        </table>
    </xsl:template>
</xsl:stylesheet>

我通常使用模板来重用:

<xsl:template match="Menu">
<xsl:template match="MenuItem">

然后我需要的地方:

<xsl:apply-templates select="/MenuRoot/Menu" />
<xsl:apply-templates select="/MenuRoot/MenuItem" />

在您的情况下,您可以使用match="/order/item"match="/order/customer/item"(只是对结构的猜测),尝试更具体。