Java HTML/XML - 如何将Java代码转换为XML/XSD而不使用注释

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;

public class Main {

  public static void main(String[] args) throws Exception {
    JAXBContext jc = JAXBContext.newInstance(Customer.class);

    Customer customer = new Customer();
    customer.setFirstName("Jane");
    customer.setLastName("Doe");

    PhoneNumber workPhone = new PhoneNumber();
    workPhone.setType("work");
    workPhone.setNumber("555-1111");
    customer.getPhoneNumbers().add(workPhone);

    Marshaller marshaller = jc.createMarshaller();
    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
    JAXBElement<Customer> rootElement = new JAXBElement<Customer>(new QName(
        "customer"), Customer.class, customer);
    marshaller.marshal(rootElement, System.out);
  }

  public static class Customer {

    private String firstName;
    private String lastName;
    private List<PhoneNumber> phoneNumbers = new ArrayList<PhoneNumber>();

    public String getFirstName() {
      return firstName;
    }

    public void setFirstName(String firstName) {
      this.firstName = firstName;
    }

    public String getLastName() {
      return lastName;
    }

    public void setLastName(String lastName) {
      this.lastName = lastName;
    }

    public List<PhoneNumber> getPhoneNumbers() {
      return phoneNumbers;
    }

    public void setPhoneNumbers(List<PhoneNumber> phoneNumbers) {
      this.phoneNumbers = phoneNumbers;
    }

  }

  public static class PhoneNumber {

    private String type;
    private String number;

    public String getType() {
      return type;
    }

    public void setType(String type) {
      this.type = type;
    }

    public String getNumber() {
      return number;
    }

    public void setNumber(String number) {
      this.number = number;
    }

  }

}