Question

I am developing a game, I would like to save the state of the objects in xml file. I don’t have a schema for it. Say I have, Country has list of States objects and that has a list of cities objects. How can I generate an xml schema that saves their information?

Answer 1

See below example helps you,

1. Main Class
   public class CreateXML {

   public static void main(String[] args) {
       try {
           final JAXBContext context = JAXBContext.newInstance(Country.class);
           final Marshaller marshaller = context.createMarshaller();
           // Create a stringWriter to hold the XML
           final StringWriter stringWriter = new StringWriter();
           CreateXML xml = new CreateXML();
           Country country = xml.createCountry();
           marshaller.marshal(country, stringWriter);
           // Print out the contents of the stringWriter
           System.out.println(stringWriter.toString());
       } catch (JAXBException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }
   private List<String> createCity(){
       List<String> cities = new ArrayList<String>();
       cities.add("Slough");
       cities.add("Manchestor");
       return cities;
   }
   private List<State> createState(){
       List<State> states = new ArrayList<State>();
       State state = new State();
       state.setStatName("London");
       state.setCityList(createCity());
       states.add(state);
       return states;
   }
   private Country createCountry(){
       Country country = new Country("UK", createState());
       return country;
   }
   

   }

2.Java Beans – Country

@XmlRootElement
public class Country {

    String countryName;
    List<State> states;
    public Country(String countryName, List<State> states) {
        this.countryName = countryName;
        this.states = states;
    }
    public Country() {
    }
    public String getCountryName() {
        return countryName;
    }
    public void setCountryName(String countryName) {
        this.countryName = countryName;
    }
    public List<State> getStates() {
        return states;
    }
    public void setStates(List<State> states) {
        this.states = states;
    }

}

3.Javabean State

String statName;
List<String> cityList;

public State() {
}
public String getStatName() {
    return statName;
}
public void setStatName(String statName) {
    this.statName = statName;
}
public List<String> getCityList() {
    return cityList;
}
public void setCityList(List<String> cityList) {
    this.cityList = cityList;
}