从受管bean中的ADF SelectOneChoice获取选定项

// 定义数据模型
public class Country {
    private String id;
    private String name;

    // Getters and Setters
}

// 在页面控制器中
public class MyController {
    private Country selectedCountry;

    public MyController() {
        selectedCountry = new Country();
    }

    public Country getSelectedCountry() {
        return selectedCountry;
    }

    public void setSelectedCountry(Country selectedCountry) {
        this.selectedCountry = selectedCountry;
    }

    public List<Country> getCountries() {
        // 从数据库或其他数据源加载国家列表
        List<Country> countries = new ArrayList<>();
        countries.add(new Country("1", "USA"));
        countries.add(new Country("2", "Canada"));
        countries.add(new Country("3", "Mexico"));
        return countries;
    }
}

<af:selectOneChoice value="#{myController.selectedCountry}" label="Country">
    <f:selectItems value="#{myController.countries}" var="country" itemValue="#{country.id}" itemLabel="#{country.name}"/>
</af:selectOneChoice>