如何从bean JSF填充菜单项
[英]How to populate menu items from bean JSF
问题描述
I am coding a dropdown menu, where a button menu is clicked and it will show it's submenus or menuitems. 
我正在编码一个下拉菜单，单击一个按钮菜单，它将显示它的子菜单或菜单项。 Currently, I am having trouble to populate the p:menuitem from the bean. 目前，我很难从bean中填充p：menuitem。 Previously, I tried to code as such 以前，我尝试这样编码
<p:menu label="PrimeFaces" icon="ui-icon-heart">
<p:menuitem value="Home" url="http://www.primefaces.org" icon="ui-icon-home" />
<p:menuitem value="Docs" url="http://www.primefaces.org/documentation" icon="ui-icon-document" />
<p:menuitem value="Download" url="http://www.primefaces.org/downloads" icon="ui-icon-arrowthick-1-s" />
<p:menuitem value="Support" url="http://www.primefaces.org/support" icon="ui-icon-wrench" />
</p:menu>
As you noticed, the menuitem values (Home, Docs, etc) are hardcoded in the JSF. 正如您所注意到的，菜单项值（Home，Docs等）在JSF中被硬编码。 How can I fetch the values from bean and populate as the menu item ? 如何从bean中获取值并填充为菜单项？ Does p:menuitem have something similar like the f:selectItems when I can set a list as the value? 当我可以将列表设置为值时，p：menuitem是否具有类似于f：selectItems的东西？
What I want to try to achieve is to populate menu items from the bean and a method will be fired when the individual menu item is selected. 我想要尝试实现的是从bean中填充菜单项，并且在选择单个菜单项时将触发一种方法。
Help is much appreciated. 非常感谢您的帮助。 Thank you. 谢谢。
2 个解决方案
解决方案1
0 2019-07-16 08:35:03
Are you sure the menu is a jsf component? 您确定菜单是jsf组件吗？ I think you may be using primefaces component, The name scheme is usually defined as follows and p:menu is a component of primefaces: 我认为您可能正在使用primefaces组件，名称方案通常定义如下，而p：menu是primefaces的组件：
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:sec="http://www.springframework.org/security/tags" >
You can customize and use the menu from the bean as follows: 您可以自定义并使用Bean中的菜单，如下所示：
xhtml: xhtml：
<p:menu model="#{menuBean.model}" />
Bean: 豆角，扁豆：
public class MenuBean {
private MenuModel model;
public MenuBean() {
model = new DefaultMenuModel();
//First submenuDefaultSubMenu firstSubmenu = new DefaultSubMenu("Dynamic Submenu");
DefaultMenuItem item = new DefaultMenuItem("External");
item.setUrl("http://www.primefaces.org");
item.setIcon("ui-icon-home");
firstSubmenu.addElement(item);
model.addElement(firstSubmenu);
//Second submenuDefaultSubMenu secondSubmenu = new DefaultSubMenu("Dynamic Actions");
item = new DefaultMenuItem("Save");
item.setIcon("ui-icon-disk");
item.setCommand("#{menuBean.save}");
item.setUpdate("messages");
secondSubmenu.addElement(item);
item = new DefaultMenuItem("Delete");
item.setIcon("ui-icon-close");
item.setCommand("#{menuBean.delete}");
item.setAjax(false);
secondSubmenu.addElement(item);
item = new DefaultMenuItem("Redirect");
item.setIcon("ui-icon-search");
item.setCommand("#{menuBean.redirect}");
secondSubmenu.addElement(item);
model.addElement(secondSubmenu);
}
public MenuModel getModel() { return model; }
}
Here you can see all the documentation: https://www.primefaces.org/docs/guide/primefaces_user_guide_6_2.pdf (pag. 333) 在这里您可以看到所有文档： https ://www.primefaces.org/docs/guide/primefaces_user_guide_6_2.pdf（第333页）
解决方案2
-1 2018-06-06 13:13:50
If you use Primefaces you can try: 如果您使用Primefaces，则可以尝试：
bean: 豆角，扁豆：
public class MyItem {
private String value;
private String url;
private String icon;
....
getters/setters
...
}
public List<MyItem> getMenuItems() {
// build list
}
xhtml: xhtml：
<p:repeat value="#{bean.menuItems}" var="item">
<p:menuitem value="#{item.value}" url="#{item.url}" icon="#{item.icon}" />
</prepeat>
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.