import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
import java.rmi.RemoteException;
import javax.swing.JOptionPane;

public class XmlConverter {

    public static void main(String[] args) {
        JOptionPane.showMessageDialog(null, "O resultado é exibido no console.");

        String xml = "<?xml version="1.0" encoding="UTF-8"?>n" +
                    "<receiptList xmlns="dsReceipt.xsd">n" +
                    " <receipt order_id="5">n" +
                    " <receipt_shopper order_id="5" shopper_id="1" ship_to_name="João da Silva" ship_to_address1="Rua Alfredo Heisler" ship_to_address2="Curitiba" ship_to_address3="PR" ship_to_address4="82600470" ship_to_phone="3066-3055" ship_to_country="BRA" ship_to_ddd_phone="41" shopper_cpf="88427867301" ship_to_street_number="83" ship_to_street_compl="apto 102b" ship_to_district="Bacacheri" reference="perto do quartel" />n" +
                    " <receipt_billing order_id="5" name="João da Silva" email="joao.silva@ciashop.com.br" customer_type="Person" document_type="Cpf" document_id="88427867301" regional_document_type="Rg" regional_document_id="57490000" regional_document_state="PR" street="Rua Alfredo Heisler" street_number="83" street_complement="apto 102b" district="Bacacheri" city="Curitiba" state="PR" country="BRA" zip_code="82600470" reference="perto ao quartel" phone_area_code="41" phone_number="3559-3055" phone_area_code_alternative="41" phone_number_alternative="9521-3425" gender="Male" birth_date="1976-09-21T00:00:00-03:00" />n" +
                    " </receipt>n" +
                    "</receiptList>";

        try {
            XStream xstream = new XStream(new DomDriver());

            xstream.alias("receipt_billing", ReceiptBilling.class);
            xstream.alias("receipt_shopper", ReceiptShopper.class);
            xstream.alias("receipt", Receipt.class);
            xstream.alias("receiptList", ReceiptList.class);
            ReceiptList receiptList = (ReceiptList) xstream.fromXML(xml);

            System.out.println("Receipt - Order Id: " + receiptList.getReceipt().getOrder_id());
            System.out.println("Receipt - Receipt Shopper - Reference: " + receiptList.getReceipt().getReceipt_shopper().getReference());

        } catch (NullPointerException e1) {
            e1.printStackTrace();
    }

    }

}

public class Receipt {
    private ReceiptShopper receipt_shopper;

    private String order_id;

    private ReceiptBilling receipt_billing;

    public ReceiptShopper getReceipt_shopper ()
    {
        return receipt_shopper;
    }

    public void setReceipt_shopper (ReceiptShopper receipt_shopper)
    {
        this.receipt_shopper = receipt_shopper;
    }

    public String getOrder_id ()
    {
        return order_id;
    }

    public void setOrder_id (String order_id)
    {
        this.order_id = order_id;
    }

    public ReceiptBilling getReceipt_billing ()
    {
        return receipt_billing;
    }

    public void setReceipt_billing (ReceiptBilling receipt_billing)
    {
        this.receipt_billing = receipt_billing;
    }
}

public class ReceiptBilling {
    private String phone_area_code;

    private String phone_number;

    private String regional_document_state;

    private String birth_date;

    private String zip_code;

    private String document_id;

    private String street;

    private String state;

    private String regional_document_type;

    private String phone_area_code_alternative;

    private String order_id;

    private String phone_number_alternative;

    private String document_type;

    private String customer_type;

    private String reference;

    private String city;

    private String country;

    private String email;

    private String name;

    private String gender;

    private String street_number;

    private String district;

    private String street_complement;

    private String regional_document_id;

    public String getPhone_area_code ()
    {
        return phone_area_code;
    }

    public void setPhone_area_code (String phone_area_code)
    {
        this.phone_area_code = phone_area_code;
    }

    public String getPhone_number ()
    {
        return phone_number;
    }

    public void setPhone_number (String phone_number)
    {
        this.phone_number = phone_number;
    }

    public String getRegional_document_state ()
    {
        return regional_document_state;
    }

    public void setRegional_document_state (String regional_document_state)
    {
        this.regional_document_state = regional_document_state;
    }

    public String getBirth_date ()
    {
        return birth_date;
    }

    public void setBirth_date (String birth_date)
    {
        this.birth_date = birth_date;
    }

    public String getZip_code ()
    {
        return zip_code;
    }

    public void setZip_code (String zip_code)
    {
        this.zip_code = zip_code;
    }

    public String getDocument_id ()
    {
        return document_id;
    }

    public void setDocument_id (String document_id)
    {
        this.document_id = document_id;
    }

    public String getStreet ()
    {
        return street;
    }

    public void setStreet (String street)
    {
        this.street = street;
    }

    public String getState ()
    {
        return state;
    }

    public void setState (String state)
    {
        this.state = state;
    }

    public String getRegional_document_type ()
    {
        return regional_document_type;
    }

    public void setRegional_document_type (String regional_document_type)
    {
        this.regional_document_type = regional_document_type;
    }

    public String getPhone_area_code_alternative ()
    {
        return phone_area_code_alternative;
    }

    public void setPhone_area_code_alternative (String phone_area_code_alternative)
    {
        this.phone_area_code_alternative = phone_area_code_alternative;
    }

    public String getOrder_id ()
    {
        return order_id;
    }

    public void setOrder_id (String order_id)
    {
        this.order_id = order_id;
    }

    public String getPhone_number_alternative ()
    {
        return phone_number_alternative;
    }

    public void setPhone_number_alternative (String phone_number_alternative)
    {
        this.phone_number_alternative = phone_number_alternative;
    }

    public String getDocument_type ()
    {
        return document_type;
    }

    public void setDocument_type (String document_type)
    {
        this.document_type = document_type;
    }

    public String getCustomer_type ()
    {
        return customer_type;
    }

    public void setCustomer_type (String customer_type)
    {
        this.customer_type = customer_type;
    }

    public String getReference ()
    {
        return reference;
    }

    public void setReference (String reference)
    {
        this.reference = reference;
    }

    public String getCity ()
    {
        return city;
    }

    public void setCity (String city)
    {
        this.city = city;
    }

    public String getCountry ()
    {
        return country;
    }

    public void setCountry (String country)
    {
        this.country = country;
    }

    public String getEmail ()
    {
        return email;
    }

    public void setEmail (String email)
    {
        this.email = email;
    }

    public String getName ()
    {
        return name;
    }

    public void setName (String name)
    {
        this.name = name;
    }

    public String getGender ()
    {
        return gender;
    }

    public void setGender (String gender)
    {
        this.gender = gender;
    }

    public String getStreet_number ()
    {
        return street_number;
    }

    public void setStreet_number (String street_number)
    {
        this.street_number = street_number;
    }

    public String getDistrict ()
    {
        return district;
    }

    public void setDistrict (String district)
    {
        this.district = district;
    }

    public String getStreet_complement ()
    {
        return street_complement;
    }

    public void setStreet_complement (String street_complement)
    {
        this.street_complement = street_complement;
    }

    public String getRegional_document_id ()
    {
        return regional_document_id;
    }

    public void setRegional_document_id (String regional_document_id)
    {
        this.regional_document_id = regional_document_id;
    }

}

public class ReceiptList {
    private Receipt receipt;

    private String xmlns;

    public Receipt getReceipt ()
    {
        return receipt;
    }

    public void setReceipt (Receipt receipt)
    {
        this.receipt = receipt;
    }

    public String getXmlns ()
    {
        return xmlns;
    }

    public void setXmlns (String xmlns)
    {
        this.xmlns = xmlns;
    }

}

public class ReceiptShopper {
    private String ship_to_address2;

    private String ship_to_address1;

    private String order_id;

    private String shopper_cpf;

    private String reference;

    private String ship_to_name;

    private String ship_to_address4;

    private String ship_to_address3;

    private String ship_to_street_number;

    private String ship_to_street_compl;

    private String ship_to_ddd_phone;

    private String ship_to_district;

    private String ship_to_phone;

    private String shopper_id;

    private String ship_to_country;

    public String getShip_to_address2 ()
    {
        return ship_to_address2;
    }

    public void setShip_to_address2 (String ship_to_address2)
    {
        this.ship_to_address2 = ship_to_address2;
    }

    public String getShip_to_address1 ()
    {
        return ship_to_address1;
    }

    public void setShip_to_address1 (String ship_to_address1)
    {
        this.ship_to_address1 = ship_to_address1;
    }

    public String getOrder_id ()
    {
        return order_id;
    }

    public void setOrder_id (String order_id)
    {
        this.order_id = order_id;
    }

    public String getShopper_cpf ()
    {
        return shopper_cpf;
    }

    public void setShopper_cpf (String shopper_cpf)
    {
        this.shopper_cpf = shopper_cpf;
    }

    public String getReference ()
    {
        return reference;
    }

    public void setReference (String reference)
    {
        this.reference = reference;
    }

    public String getShip_to_name ()
    {
        return ship_to_name;
    }

    public void setShip_to_name (String ship_to_name)
    {
        this.ship_to_name = ship_to_name;
    }

    public String getShip_to_address4 ()
    {
        return ship_to_address4;
    }

    public void setShip_to_address4 (String ship_to_address4)
    {
        this.ship_to_address4 = ship_to_address4;
    }

    public String getShip_to_address3 ()
    {
        return ship_to_address3;
    }

    public void setShip_to_address3 (String ship_to_address3)
    {
        this.ship_to_address3 = ship_to_address3;
    }

    public String getShip_to_street_number ()
    {
        return ship_to_street_number;
    }

    public void setShip_to_street_number (String ship_to_street_number)
    {
        this.ship_to_street_number = ship_to_street_number;
    }

    public String getShip_to_street_compl ()
    {
        return ship_to_street_compl;
    }

    public void setShip_to_street_compl (String ship_to_street_compl)
    {
        this.ship_to_street_compl = ship_to_street_compl;
    }

    public String getShip_to_ddd_phone ()
    {
        return ship_to_ddd_phone;
    }

    public void setShip_to_ddd_phone (String ship_to_ddd_phone)
    {
        this.ship_to_ddd_phone = ship_to_ddd_phone;
    }

    public String getShip_to_district ()
    {
        return ship_to_district;
    }

    public void setShip_to_district (String ship_to_district)
    {
        this.ship_to_district = ship_to_district;
    }

    public String getShip_to_phone ()
    {
        return ship_to_phone;
    }

    public void setShip_to_phone (String ship_to_phone)
    {
        this.ship_to_phone = ship_to_phone;
    }

    public String getShopper_id ()
    {
        return shopper_id;
    }

    public void setShopper_id (String shopper_id)
    {
        this.shopper_id = shopper_id;
    }

    public String getShip_to_country ()
    {
        return ship_to_country;
    }

    public void setShip_to_country (String ship_to_country)
    {
        this.ship_to_country = ship_to_country;
    }

}

Security framework of XStream not initialized, XStream is probably vulnerable.
Exception in thread "main" com.thoughtworks.xstream.converters.ConversionException: Invalid reference
---- Debugging information ----
message             : Invalid reference
reference           : perto do quartel
referenced-type     : xmlconverter.ReceiptShopper
referenceable       : true
class               : xmlconverter.Receipt
required-type       : xmlconverter.Receipt
converter-type      : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
path                : /receiptList/receipt/receipt_shopper
class[1]            : xmlconverter.ReceiptList
required-type[1]    : xmlconverter.ReceiptList
version             : 1.4.11.1
-------------------------------
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:58)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:499)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:425)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:277)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:499)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:425)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:277)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:72)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
    at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1487)
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1467)
    at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1338)
    at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1329)
    at xmlconverter.XmlConverter.main(XmlConverter.java:33)