How to display date value in XSLT transformation

Question

My UI supplies the user selected date in milliseconds to the backend rest layer.

For e.g Say the user selects "07/11/2018" from the UI then it gets passed on to the REST layer as milliseconds '1541509200000'. And the REST layer maps this value to a 'XMLGregorianCalendarObject' within my DTO.

import java.io.Serializable;
import javax.xml.datatype.XMLGregorianCalendar;
import javax.xml.bind.annotation.XmlSchemaType;

public class PersonDetails implements Serializable
{

    @XmlSchemaType(name = "date")
    protected XMLGregorianCalendar dateOfBirth;

    public XMLGregorianCalendar getDateOfBirth() {
        return dateOfBirth;
    }

    public void setDateOfBirth(XMLGregorianCalendar value) {
        this.dateOfBirth = value;
    }

}

And this DTO gets converted to an XML and stored. The XML payload looks like below :

    <personDetails>
       <dateOfBirth>2018-11-06Z</dateOfBirth>
    </personDetails>

I have the below XSLT code which is currently just displaying the above dateOfBirth element :

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0"
    xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xsl:output omit-xml-declaration="yes" indent="yes"/>
    <xsl:strip-space elements="*"/>
    <xsl:template match="/">    
        <div>
            <div> Date of birth: </div>
            <div> <xsl:value-of select="//personDetails/dateOfBirth" /> </div>
        </div>
</xsl:template>

And it generates the output

Date of birth: 2018-11-06Z

What should i do to display the dateOfBirth as the original user selected 07/11/2018 in the XSLT transformation .

Answer 1

XSLT 1.0 has no concept of dates. You must manipulate the input using string functions:

<xsl:template match="personDetails">    
    <div>
        <div> Date of birth: </div>
        <div>
            <!-- day-->
            <xsl:value-of select="substring(dateOfBirth, 9, 2)" />
            <xsl:text>/</xsl:text>
            <!-- month-->
            <xsl:value-of select="substring(dateOfBirth, 6, 2)" />
            <xsl:text>/</xsl:text>
            <!-- year-->
            <xsl:value-of select="substring(dateOfBirth, 1, 4)" />
        </div>
    </div>
</xsl:template>