CADES-T signature Java8

Question

I am developing a Java application (version 8) that will call a SOAP WS. It has the following input parameter:

<![CDATA[<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns2:mensajeWS xmlns:ns2="https://wslexnet.webservices.lexnet/3.27">
    <solicitudLoginServiciosGeneral>
        <idAplicacion>MIID</idAplicacion>
        <firmaAplicacion>FIRMA</firmaAplicacion>
    </solicitudLoginServiciosGeneral>
</ns2:mensajeWS>]]>

Where firmaAplicacion will be obtained as follows:

1.The idAplicacion value is passed to SHA-256 2.Once the value is obtained in SHA-256, the signature is performed in CADES-T 3.Finally it goes to Base64.

I know how to obtain steps 1 and 3. But the question is the signature in CADES-T (I know it has something to do with the java.security.cert.X509Certificate library) and I have a public certificate (with a .cer extension) and a private one (with a .p12 extension and its password) but I can't find a way to develop it. Can anybody help me?

get Cades-T signature