Language , . Converter, Language String, , HTML HTTP- - String.
, Language code name bean, :
@ManagedBean
@ApplicationScoped
public class Data {
private List<Language> languages;
@PostConstruct
public void init() {
languages= new ArrayList<Language>();
languages.add(new Language("en", "English"));
languages.add(new Language("hi", "Hindi"));
languages.add(new Language("te", "Telugu"));
}
public List<Language> getLanguages() {
return languages;
}
}
:
<h:selectManyCheckbox value="#{bean.selectedLanguages}" converter="languageConverter">
<f:selectItems value="#{data.languages}" var="language"
itemValue="#{language}" itemLabel="#{language.name}" />
</h:selectManyCheckbox>
bean
@ManagedBean
@ViewScoped
public class Bean {
private List<Language> selectedLanguages;
}
@FacesConverter("languageConverter")
public class LanguageConverter implements Converter {
@Override
public String getAsString(FacesContext context, UIComponent component, Object object) {
return ((Language) object).getCode();
}
@Override
public Object getAsObject(FacesContext context, UIComponent component, String submittedValue) {
List<Language> languages = (List<Language>) context.getApplication().evaluateExpressionGet(context.getELContext(), "#{data.languages}", List.class);
for (Language language : languages) {
if (language.getCode().equals(submittedValue)) {
return language;
}
}
return null;
}
}