import org.primefaces.model.menu.DefaultSubMenu; //导入依赖的package包/类
/**
 * 
 * @return 
 */
public MenuModel getMenuItems(){
    
    ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
    Map<String,String> request = externalContext.getRequestParameterMap();
    
    String groupId = request.get("g");

    MenuModel model = new DefaultMenuModel();
    DefaultSubMenu submenu = new DefaultSubMenu();
    submenu.setId("influencersMenu");

    List<GroupRating> groups = getGroupsRating();

    if(groups.size()>0){
        groups = groups.subList(3, groups.size());
        groups.stream().forEach((group) -> {
            String displayValue = group.getGroupName() + " ("+group.getRatio()+")";

            DefaultMenuItem item = new DefaultMenuItem();
            item.setValue(displayValue);
            item.setId(group.getGroupId());
            item.setUrl("/groupTop20.xhtml?g="+ group.getGroupId());
            item.setStyle("font-size:12px;");
            if(group.getGroupId().equals(groupId)){
                item.setStyle("color:red;font-size:12px;");
            }
            submenu.addElement(item);
        });
        model.addElement(submenu);
    }
    return model;
}
 

import org.primefaces.model.menu.DefaultSubMenu; //导入依赖的package包/类
@PostConstruct
public void init() {
	menubar = new DefaultMenuModel();
	DefaultMenuItem menuItemDashboard = new DefaultMenuItem();
	menuItemDashboard.setUrl("dashboard.xhtml");
	menuItemDashboard.setValue("Dashboard");
	menubar.addElement(menuItemDashboard);

	DefaultSubMenu subMenuChecks = new DefaultSubMenu();
	subMenuChecks.setLabel("Checks");

	DefaultMenuItem menuItemUncategorizedChecks = new DefaultMenuItem();
	menuItemUncategorizedChecks.setUrl("checks.xhtml");
	menuItemUncategorizedChecks.setValue("Uncategorized");

	subMenuChecks.addElement(menuItemUncategorizedChecks);

	for (Page page : pageService.findAll()) {
		DefaultMenuItem menuItemDynamicPage = new DefaultMenuItem();
		menuItemDynamicPage.setUrl("checks.xhtml?page=" + page.getId());
		menuItemDynamicPage.setValue(page.getName());
		subMenuChecks.addElement(menuItemDynamicPage);
	}

	menubar.addElement(subMenuChecks);

	DefaultMenuItem menuItemPages = new DefaultMenuItem();
	menuItemPages.setUrl("pages.xhtml");
	menuItemPages.setValue("Manage pages");
	menubar.addElement(menuItemPages);

	DefaultMenuItem menuItemConfiguration = new DefaultMenuItem();
	menuItemConfiguration.setUrl("configuration.xhtml");
	menuItemConfiguration.setValue("Configuration");
	menubar.addElement(menuItemConfiguration);

	DefaultMenuItem menuItemLogout = new DefaultMenuItem();
	menuItemLogout.setUrl("../logout");
	menuItemLogout.setValue("Logout");
	menubar.addElement(menuItemLogout);
}