小编Sil*_*ish的帖子

我的primefaces pickList源和目标值不会改变,我已经在primefaces showcase中跟踪了示例, 并且在这里查看了几个帖子,但仍然无法解决问题.我正在使用数据库中的列表来填充源代码,如下所示:

private DualListModel<Course> courseModel;
public CourseBean() {
    List<Course> target = new ArrayList<Course>();
    List<Course> source = new ArrayList<Course>();
    courseModel = new DualListModel<Course>(source, target);
}
...
//this DualListModel getter also populates the source with values from db
public DualListModel<Course> getCourseModel() {
    courseModel.setSource(getCourseList());
    return courseModel;
}

我的转换器是

import org.omnifaces.converter.SelectItemsConverter;

@FacesConverter("courseConverter")
public class CourseConverter extends SelectItemsConverter {
@Override
public String getAsString(FacesContext context, UIComponent component,
        Object value) {
    Integer id = (value instanceof Course) ? ((Course) value).getId()
            : null;
    return …