我正致力于将XML转换为CSV数据。通过查看各种示例，我能够编写用于解析XML文件和获取CSV文件的代码。但是，我编写的代码返回的CSV文件没有显示XML文件中存在的所有标记。
我有转换的XSLT。我是XSLT的新手，所以我相信我的XSLT有问题。
这是Java代码：
package com.adarsh.conversions;
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.w3c.dom.Document;
class XMLtoCsVConversion {
public static void main(String args[]) throws Exception {
File stylesheet = new File("style.xsl");
File xmlSource = new File("sample_data.xml");
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(xmlSource);
StreamSource stylesource = new StreamSource(stylesheet);
Transformer transformer = TransformerFactory.newInstance()
.newTransformer(stylesource);
Source source = new DOMSource(document);
Result outputTarget = new StreamResult(new File("/tmp/x.csv"));
transformer.transform(source, outputTarget);
}
}
这是我正在使用的XSLT：
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:for-each select="*/*[1]/*">
<xsl:value-of select="name()" />
<xsl:if test="not(position() = last())">,</xsl:if>
</xsl:for-each>
<xsl:text> </xsl:text>
<xsl:apply-templates select="*/*" mode="row"/>
</xsl:template>
<xsl:template match="*" mode="row">
<xsl:apply-templates select="*" mode="data" />
<xsl:text> </xsl:text>
</xsl:template>
<xsl:template match="*" mode="data">
<xsl:choose>
<xsl:when test="contains(text(),',')">
<xsl:text>"</xsl:text>
<xsl:call-template name="doublequotes">
<xsl:with-param name="text" select="text()" />
</xsl:call-template>
<xsl:text>"</xsl:text>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="." />
</xsl:otherwise>
</xsl:choose>
<xsl:if test="position() != last()">,</xsl:if>
</xsl:template>
<xsl:template name="doublequotes">
<xsl:param name="text" />
<xsl:choose>
<xsl:when test="contains($text,'"')">
<xsl:value-of select="concat(substring-before($text,'"'),'""')" />
<xsl:call-template name="doublequotes">
<xsl:with-param name="text" select="substring-after($text,'"')" />
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$text" />
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
这是我尝试转换为CSV的XML文件：
<?xml version="1.0"?>
<school id="100" name="WGen School">
<grade id="1">
<classroom id="101" name="Mrs. Jones' Math Class">
<teacher id="10100000001" first_name="Barbara" last_name="Jones"/>
<student id="10100000010" first_name="Michael" last_name="Gil"/>
<student id="10100000011" first_name="Kimberly" last_name="Gutierrez"/>
<student id="10100000013" first_name="Toby" last_name="Mercado"/>
<student id="10100000014" first_name="Lizzie" last_name="Garcia"/>
<student id="10100000015" first_name="Alex" last_name="Cruz"/>
</classroom>
<classroom id="102" name="Mr. Smith's PhysEd Class">
<teacher id="10200000001" first_name="Arthur" last_name="Smith"/>
<teacher id="10200000011" first_name="John" last_name="Patterson"/>
<student id="10200000010" first_name="Nathaniel" last_name="Smith"/>
<student id="10200000011" first_name="Brandon" last_name="McCrancy"/>
<student id="10200000012" first_name="Elizabeth" last_name="Marco"/>
<student id="10200000013" first_name="Erica" last_name="Lanni"/>
<student id="10200000014" first_name="Michael" last_name="Flores"/>
<student id="10200000015" first_name="Jasmin" last_name="Hill"/>
<student id="10200000016" first_name="Brittany" last_name="Perez"/>
<student id="10200000017" first_name="William" last_name="Hiram"/>
<student id="10200000018" first_name="Alexis" last_name="Reginald"/>
<student id="10200000019" first_name="Matthew" last_name="Gayle"/>
</classroom>
<classroom id="103" name="Brian's Homeroom">
<teacher id="10300000001" first_name="Brian" last_name="O'Donnell"/>
</classroom>
</grade>
</school>
期待的是：
classroom id, classroom_name, teacher_1_id, teacher_1_last_name, teacher_1_first_name, teacher_2_id, teacher_2_last_name, teacher_2_first_name, student_id, student_last_name, student_first_name, grade
101, Mrs. Jones' Math Class, 10100000001, Jones, Barbara, , , , 10100000010, Gil, Michael, 2
101, Mrs. Jones' Math Class, 10100000001, Jones, Barbara, , , , 10100000011, Gutierrez, Kimberly, 2
101, Mrs. Jones' Math Class, 10100000001, Jones, Barbara, , , , 10100000013, Mercado, Toby, 1
101, Mrs. Jones' Math Class, 10100000001, Jones, Barbara, , , , 10100000014, Garcia, Lizzie, 1
101, Mrs. Jones' Math Class, 10100000001, Jones, Barbara, , , , 10100000015, Cruz, Alex, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000010, Smith, Nathaniel, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000011, McCrancy, Brandon, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000012, Marco, Elizabeth, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000013, Lanni, Erica, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000014, Flores, Michael, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000015, Hill, Jasmin, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000016, Perez, Brittany, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000017, Hiram, William, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000018, Reginald, Alexis, 1
102, Mr. Smith's PhysEd Class, 10200000001, Smith, Arthur, 10200000011, Patterson, John, 10200000019, Gayle, Matthew, 1
103, Brian's Homeroom, 10300000001, O'Donnell, Brian, , , , , , ,
但是我只是
课堂教室
有人可以帮我解决这个问题吗？
P.S。我已经在stackoverflow上提到了有关CSV到XML转换的其他问题。我已经使用这些帖子中提供的信息来帮助我创建XSL。
答案 0 :(得分：2)
我建议你以此为出发点：
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text" encoding="UTF-8"/>
<xsl:template match="/school">
<!-- header -->
<xsl:text>classroom id,classroom_name,teacher_1_id,teacher_1_last_name,teacher_1_first_name,teacher_2_id,teacher_2_last_name,teacher_2_first_name,student_id,student_last_name,student_first_name,grade </xsl:text>
<!-- data -->
<xsl:for-each select="grade/classroom">
<!-- classroom data -->
<xsl:variable name="classroom-data">
<xsl:value-of select="@id" />
<xsl:text>,</xsl:text>
<xsl:value-of select="@name" />
<xsl:text>,</xsl:text>
<xsl:value-of select="teacher[1]/@id" />
<xsl:text>,</xsl:text>
<xsl:value-of select="teacher[1]/@last_name" />
<xsl:text>,</xsl:text>
<xsl:value-of select="teacher[1]/@first_name" />
<xsl:text>,</xsl:text>
<xsl:value-of select="teacher[2]/@id" />
<xsl:text>,</xsl:text>
<xsl:value-of select="teacher[2]/@last_name" />
<xsl:text>,</xsl:text>
<xsl:value-of select="teacher[2]/@first_name" />
<xsl:text>,</xsl:text>
</xsl:variable>
<xsl:variable name="grade-id" select="../@id" />
<xsl:for-each select="student">
<xsl:copy-of select="$classroom-data"/>
<!-- student data -->
<xsl:value-of select="@id" />
<xsl:text>,</xsl:text>
<xsl:value-of select="@last_name" />
<xsl:text>,</xsl:text>
<xsl:value-of select="@first_name" />
<xsl:text>,</xsl:text>
<xsl:value-of select="$grade-id" />
<xsl:text> </xsl:text>
</xsl:for-each>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
应用于您的输入，结果将是：
classroom id,classroom_name,teacher_1_id,teacher_1_last_name,teacher_1_first_name,teacher_2_id,teacher_2_last_name,teacher_2_first_name,student_id,student_last_name,student_first_name,grade
101,Mrs. Jones' Math Class,10100000001,Jones,Barbara,,,,10100000010,Gil,Michael,1
101,Mrs. Jones' Math Class,10100000001,Jones,Barbara,,,,10100000011,Gutierrez,Kimberly,1
101,Mrs. Jones' Math Class,10100000001,Jones,Barbara,,,,10100000013,Mercado,Toby,1
101,Mrs. Jones' Math Class,10100000001,Jones,Barbara,,,,10100000014,Garcia,Lizzie,1
101,Mrs. Jones' Math Class,10100000001,Jones,Barbara,,,,10100000015,Cruz,Alex,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000010,Smith,Nathaniel,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000011,McCrancy,Brandon,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000012,Marco,Elizabeth,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000013,Lanni,Erica,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000014,Flores,Michael,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000015,Hill,Jasmin,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000016,Perez,Brittany,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000017,Hiram,William,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000018,Reginald,Alexis,1
102,Mr. Smith's PhysEd Class,10200000001,Smith,Arthur,10200000011,Patterson,John,10200000019,Gayle,Matthew,1
请注意，这假设您的输入字段不包含逗号或双引号。