This post demonstrates how to modify some parts of the XML content in Java using XSLT. The example herein is rather straight-forward but provides basic working codes before moving to more advanced stuff.

[wp_ad_camp_1]

Requirements

Stuff used.

Java 8 (JDK)
IntelliJ IDEA – optional
Spring Boot – optional
Windows 10 – optional
XSLT 1.0

Purpose

Modify some element text in input.xml using Java based on rules and expressions declared in translation.xsl. The modified XML content is written to output.xml.

We are to prefix the heading value with CONFIDENTIAL: and append Please do not print! to the body value.

[wp_ad_camp_2]

Sample XML and XSL Files

These are the XML files to be used here – input.xml and translation.xsl

<email>
    <to-list>
        <to>toby.lim@xyz.com</to>
        <to>poh.leong@xyz.com</to>
    </to-list>
    <cc-list>
        <cc>abc@xyz</cc>
        <cc>wto@xyz</cc>
    </cc-list>
    <from>patricia.lee@xyz.com</from>
    <heading>Production Release Rescheduled</heading>
    <body>FYI</body>
</email>

<email>

<to-list>

<to>poh.leong@xyz.com</to>

</to-list>

<cc-list>

</cc-list>

<from>patricia.lee@xyz.com</from>

<heading>Production Release Rescheduled</heading>

</email>

Translation.xsl contains rules and expressions on how to go about replacing stuff in the input.xml and produce the output.xml file with some Java codes.

[wp_ad_camp_3]

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

  <xsl:output method="xml" indent="yes"/>

  <xsl:param name="headingPrefix"/>
  <xsl:param name="bodyDisclaimer"/>

  <xsl:template match="@* | node()">
    <xsl:copy>
      <xsl:apply-templates select="@* | node()"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="*[local-name()='heading']">
    <xsl:copy>
      <xsl:value-of select="concat($headingPrefix, ':', text())"/>
    </xsl:copy>

  </xsl:template>

  <xsl:template match="*[local-name()='body']">
    <xsl:copy>
      <xsl:value-of select="concat(text(), ' ', $bodyDisclaimer)"/>
    </xsl:copy>
  </xsl:template>

</xsl:stylesheet>

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output method="xml" indent="yes"/>

<xsl:param name="headingPrefix"/>

<xsl:param name="bodyDisclaimer"/>

<xsl:template match="@* | node()">

<xsl:copy>

<xsl:apply-templates select="@* | node()"/>

</xsl:copy>

</xsl:template>

<xsl:template match="*[local-name()='heading']">

<xsl:copy>

<xsl:value-of select="concat($headingPrefix, ':', text())"/>

</xsl:copy>

</xsl:template>

<xsl:template match="*[local-name()='body']">

<xsl:copy>

<xsl:value-of select="concat(text(), ' ', $bodyDisclaimer)"/>

</xsl:copy>

</xsl:template>

</xsl:stylesheet>

Target Output XML

The output.xml will have this content:

<?xml version="1.0" encoding="UTF-8"?><email>
    <to-list>
        <to>toby.lim@xyz.com</to>
        <to>poh.leong@xyz.com</to>
    </to-list>
    <cc-list>
        <cc>abc@xyz</cc>
        <cc>wto@xyz</cc>
    </cc-list>
    <from>patricia.lee@xyz.com</from>
    <heading>CONFIDENTIAL:Production Release Rescheduled</heading>
    <body>FYI Please do not print!</body>
</email>

<?xml version="1.0" encoding="UTF-8"?><email>

<to-list>

<to>poh.leong@xyz.com</to>

</to-list>

<cc-list>

</cc-list>

<from>patricia.lee@xyz.com</from>

<heading>CONFIDENTIAL:Production Release Rescheduled</heading>

<body>FYI Please do not print!</body>

</email>

Java Codes

[wp_ad_camp_4]

package com.turreta.xslt;

...

@SpringBootApplication
public class ComTurretaXsltApplication {

	public static void main(String[] args) {
		SpringApplication.run(ComTurretaXsltApplication.class, args);

		Source inputXml = new StreamSource(new File("C:\\Users\\user111abc\\Desktop\\test-data\\input.xml"));
		Source xsl = new StreamSource(new File("C:\\Users\\user111abc\\Desktop\\test-data\\translation.xsl"));
		Result outputXml = new StreamResult(new File("C:\\user111abc\\sang018\\Desktop\\test-data\\output.xml"));

		try {
			Transformer transformer = TransformerFactory.newInstance().newTransformer(xsl);
			transformer.setParameter("headingPrefix", "CONFIDENTIAL");
			transformer.setParameter("bodyDisclaimer", "Please do not print!");
			transformer.transform(inputXml, outputXml);
		} catch (TransformerException e) {
			e.getMessage();
		}
	}
}