<xsl:variable name="qrName">Общество с ограниченной ответственностью "Весёлые ребятишки"</xsl:variable>
<xsl:variable name="qrBankName">ЦЧБ ОАО "Сбербанк России"</xsl:variable>
<xsl:variable name="qrPersonalAcc"     select="'40701234013000009876'"/>
<xsl:variable name="qrBIC"             select="'042007681'"/>
<xsl:variable name="qrCorrespAcc"      select="'30101654300000009876'"/>
<xsl:variable name="qrSum"             select="translate(format-number(bill/@summ, '.00'), '.', '')"/>
<xsl:variable name="qrPurpose"         select="'Оплата по договору'"/>
<xsl:variable name="qrPayeeINN"        select="'3665051234'"/>
<xsl:variable name="qrKPP"             select="'366401234'"/>
<xsl:variable name="qrPersonalAccount" select="normalize-space(bill/@contractTitle)"/>
...
<fo:instream-foreign-object>
    <barcode:barcode
        xmlns:barcode="http://barcode4j.krysalis.org/ns"
        message="ST00012|Name={$qrName}|PersonalAcc={$qrPersonalAcc}|BankName={$qrBankName}|BIC={$qrBIC}|CorrespAcc={$qrCorrespAcc}|Sum={$qrSum}|Purpose={$qrPurpose}|PayeeINN={$qrPayeeINN}|KPP={$qrKPP}|PersonalAccount={$qrPersonalAccount}|">

        <barcode:qr>
            <barcode:module-width>0.5mm</barcode:module-width>
            <barcode:encoding>UTF-8</barcode:encoding>
        </barcode:qr>
    </barcode:barcode>
</fo:instream-foreign-object>

barcode4j-fop-ext.jar
barcode4j.jar
zxing-core.jar