XSLT XPATH 学习笔记_xsltxpath怎么去重-优快云博客

本文链接：https://blog.youkuaiyun.com/aizijie123456/article/details/79992423

本文介绍了一段XSLT代码，该代码用于从给定的XML数据中筛选出属性Avail为true的酒店节点，并收集这些酒店中的单人间、双人间和双床间的信息。通过使用XSLT的特性，如key、generate-id和模板匹配等功能，实现了对酒店及其房间类型的高效查询。

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1. Get the nodes which the attribute Avail="true"

2. Collect the single, double, twins rooms.

<?xml version="1.0" encoding="UTF-8"?>
<Hotels>
   <Hotel Code="Hotel1" Name="My Name 1" Avail="true">
       <Description>My Description 1</Description>
       <Price>80</Price>
       <Rooms>
           <Room Type="Double">
               <Price>120</Price>
           </Room>
           <Room Type="Single">
               <Price>80</Price>
           </Room>
           <Room Type="Twins">
               <Price>150</Price>
           </Room>
       </Rooms>
   </Hotel>
   <Hotel Code="Hotel2" Name="My Name 2" Avail="false">
       <Description>My Description 2</Description>
       <Price>50</Price>
       <Rooms>
           <Room Type="Double">
               <Price>80</Price>
           </Room>
           <Room Type="Single">
               <Price>50</Price>
           </Room>
       </Rooms>
   </Hotel>
   <Hotel Code="Hotel3" Name="My Name 3" Avail="true">
       <Description>My Description 3</Description>
       <Price>180</Price>
       <Rooms>
           <Room Type="Double">
               <Price>180</Price>
           </Room>
           <Room Type="Twins">
               <Price>200</Price>
           </Room>
       </Rooms>
   </Hotel>
   <Hotel Code="Hotel4" Name="My Name 4" Avail="true">
       <Description>My Description 4</Description>
       <Price>300</Price>
       <Rooms>
           <Room Type="Double">
               <Price>450</Price>
           </Room>
           <Room Type="Single">
               <Price>300</Price>
           </Room>
           <Room Type="Twins">
               <Price>480</Price>
           </Room>
       </Rooms>
   </Hotel>
   <Hotel Code="Hotel5" Name="My Name 5" Avail="false">
       <Description>My Description 1</Description>
       <Price>150</Price>
       <Rooms>
           <Room Type="Double">
               <Price>150</Price>
           </Room>
           <Room Type="Twins">
               <Price>180</Price>
           </Room>
       </Rooms>
   </Hotel>
   <Hotel Code="Hotel6" Name="My Name 6" Avail="true">
       <Description>My Description 6</Description>
       <Price>100</Price>
       <Rooms>
           <Room Type="Single">
               <Price>100</Price>
           </Room>
           <Room Type="Twins">
               <Price>180</Price>
           </Room>
       </Rooms>
   </Hotel>

</Hotels>

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   
   <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
   <xsl:template match="/">
       <DisplayHotels>
           
           <xsl:apply-templates select="Hotels" mode="collectRooms"/>
       </DisplayHotels>
   </xsl:template>
   
   <xsl:key name="roomType" match="Hotel/Rooms/Room" use="@Type"/>
   <xsl:template match="Hotels" mode="collectRooms">
       
       <xsl:for-each select="Hotel/Rooms/Room[generate-id() = generate-id(key('roomType', @Type))]">
           <DisplayRooms Type="{@Type}">
               <xsl:for-each select="key('roomType',@Type)">
                   <xsl:variable name="index" select="position()"/>
                   <xsl:variable name="avail" select="../../@Avail"/>
                   <xsl:if test="$avail = 'true'">
                       <xsl:if test="$index mod 2 > 0">
                           <DisplayRoom RowType="odd-row" index="{$index}">
                               <Name>
                               
                                   <xsl:value-of select="../../@Name"/>
                               </Name>
                               <Price>
                                   <xsl:value-of select="Price"/>
                               </Price>
                               <Description>
                                   <xsl:value-of select="../../Description"/>
                               </Description>
                           </DisplayRoom>
                       </xsl:if>
                   </xsl:if>
               </xsl:for-each>
           </DisplayRooms>
       </xsl:for-each>
   </xsl:template>
</xsl:stylesheet>