How do I link the RDF codes with my registration form?

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Java

I have a Registration form, after giving the input it will generate a RDF File. My, professor have given me the RDF generation code, but I am unable to understand that how will I link it with my Registration page.

What I have tried:

Here is my RDF generation code

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package ac.at.ju.rdfgraphgeneration;

import ac.at.ju.rdfUtility.UploadRDFFile;
import ac.at.ju.rdfUtility.DBURIFileDirectoryInformation;
import ac.at.ju.rdfUtility.RDFFileWrite;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
//import javax.management.Query;

import org.apache.jena.iri.impl.Main;
import org.apache.jena.query.QueryExecution;
//import org.apache.jena.query.QueryExecutionFactory;
import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.RDFList;
import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.util.FileManager;
import org.apache.jena.query.QueryFactory;
import org.apache.jena.query.Query;
import org.apache.jena.query.QueryExecutionFactory;
import org.apache.jena.query.QuerySolution;
import org.apache.jena.query.ResultSet;
import org.apache.jena.rdf.model.Literal;

/**
 *
 * @author anindita
 * 
 * This function will be called when a person creates new account
 * 
 */

public class RDFAccountInformation {
    private String fileName;
    private LinkedList<String> userAccountList;
    private String dbURI;
    private String userAccountEntry;

    public void setDbURI(String dbURI) {
        this.dbURI = dbURI;
    }
    public void setUserAccountEntry(String userAccountEntry) {
        this.userAccountEntry = userAccountEntry;
    }
    public void setFileName(String fileName) {
        this.fileName = fileName;
    }
    public String getFileDirectory()
    {
        return DBURIFileDirectoryInformation.getInstance().getFileDirectory();
    }
    public void setUserAccountList(LinkedList<String> userAccountList) {
        this.userAccountList = userAccountList;
    }
    
    public int getNumberOfUser() {
        return this.userAccountList.size();
    }
     //RDF file generation
    
    public Model getAccountRDF() throws IOException
    {
         Model m = ModelFactory.createDefaultModel();
       
       Resource account = m.createResource( this.dbURI + "user" );
       Property P = m.createProperty( this.dbURI + "account" );
 
       RDFNode accountNodeArray[]=new RDFNode[getNumberOfUser()];
       for(int i=0;i<getNumberOfUser();i++)
        {
        accountNodeArray[i]=m.createResource(this.dbURI+this.userAccountList.get(i));
        }
      RDFList list=m.createList(accountNodeArray);
      m.add(account, P, list);  
      m.setNsPrefix( "db", this.dbURI );
       return m;
  }
     public void accountInformationGeneration()throws IOException
    {
        LinkedList<String> userList=new LinkedList<String> ();
        if(new File(fileName).exists())
        {
            userList=UploadRDFFile.getInstance().
                       mainExistUserInformation(this.fileName);
        }
         userList.add(this.userAccountEntry);
         setUserAccountList(userList);
         RDFFileWrite.getInstance().fileWriteOperation(getAccountRDF(), this.fileName);
    }
    //responsible to call all the functions and outside class communicate with this method
    public void mainAccountInformationGeneration(String userAccountEntry)throws IOException
    {
         //this information can be changed
        {
        setFileName(getFileDirectory()+"AccountInfo.rdf");
        setDbURI(DBURIFileDirectoryInformation.getInstance().getDBURI());
       }
        setUserAccountEntry(userAccountEntry);
        accountInformationGeneration();
    }
    public static void main(String []p) throws IOException
    {
        String accountId="account6";  //input
        
        new RDFAccountInformation().mainAccountInformationGeneration(accountId);
    }
   
    
}