在开发中,使用到了my faces 的jscookmenu组件,其功能是显示出一个分类的功能
页面代码如下:
<h:form>
<t:jscookMenu layout="vbr" theme="ThemeOffice">
<t:navigationMenuItems id="navigationmenu"
value="#{softWareCategoryBean.softWareList}" />
</t:jscookMenu>
</h:form>
其中softWareCategoryBean.softWareList是通过递归出来的

item 类型为NavigationMenuItem 并设置了其的action及actionListener

item.setValue(id);//id值是动态数据
item.setAction("#{softWareListBean.toSoftwarelist}");
item.setActionListener("#{softWareListBean.menuListener}");


以下是action及actionListener定义

public String toSoftwarelist(){
return "softwarelist";//跳转到software.jsp页面
}

public void menuListener(ActionEvent event){
if(event.getComponent() instanceof HtmlCommandJSCookMenu){
String tmp_id = (String)((HtmlCommandJSCookMenu)event
.getComponent()).getValue();
this.setId(new Long(tmp_id));//this.setId()为当前bean的一个属性
}
}


software.jsp对应的backing bean 为 softWareListBean
software.jsp的作用是跟据所选择的分类,显示此分类下的产品列表[带分页功能]

现在问题是,当 首次 进入software.jsp是工作正常的,但当我点下一页的时候,则丢失了在actionListener中设置的id 则[this.setId(new Long(tmp_id));],请问如何保存此Id呢?

software.jsp中有此一段
<h:form>
...
<h:selectOneMenu value="#{softWareListBean.page.currentPage}" >
<f:selectItems value="#{softWareListBean.page.menuList}"/>
</h:selectOneMenu>
<h:inputHidden id="id" value="#{softWareListBean.id}"/>
<t:commandButton value="go" action="#{softWareListBean.go}"/>
<t:commandButton value="prvs" action="#{softWareListBean.prvs}" />
<t:commandButton value="next" action="#{softWareListBean.next}"/>
</h:form>

本人才刚学习jsf,请望多多指教!

MSN:winfastvv@163.com

public void menuListener(ActionEvent event){
if(event.getComponent() instanceof HtmlCommandJSCookMenu){
String tmp_id = (String)((HtmlCommandJSCookMenu)event
.getComponent()).getValue();
this.setId(new Long(tmp_id));//this.setId()为当前bean的一个属性
}
}
我没测试过你的这段代码，代码也是大概看了下
你这里有个地方
if(event.getComponent() instanceof HtmlCommandJSCookMenu)
这里只是判断你的组件是否为HtmlCommandJSCookMenu
你看试下，在HtmlCommandJSCookMenu这个组件的页面中设置他的ID属性
在后台代码中通过他的ID值来取得这个HtmlCommandJSCookMenu组件，看是否问题可以解决！即<t:jscookMenu layout="vbr" theme="ThemeOffice" ID="XXX">
对于值的传递看能否用<t:updateActionListener/>看能否解决你上面的问题！

首先谢谢你的回复!

我后台是通过这个来生成的
item.setValue(id);//id值是动态数据
item.setAction("#{softWareListBean.toSoftwarelist}");
item.setActionListener("#{softWareListBean.menuListener}");

如何利用你的这个?
<t:updateActionListener/>

另外:我现在是首次进入页面是正常的..但当在页面有提交动作,则backing bean的id值丢失,而id值是从softWareListBean.menuListener监听来的...是否有关系..

我的监听写在softWareListBean里可以的吗??

说实话，通过这么几个代码真的看不出什么
如果有时间的话，把全部关联的代码贴上来

显示jscookMenu的页面,如下: a.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>
<%@ taglib prefix="tiles" uri="http://struts.apache.org/tags-tiles"%>
<f:verbatim>
<div id="myaccountsidebar3"style=" padding:1px;">
<div class="note" id="tab">Software Categories</div>
<div class="s_c1" ></f:verbatim><h:form>
<t:jscookMenu layout="vbr" theme="ThemeOffice">
<t:navigationMenuItems id="navigationmenu" value="#{softWareCategoryBean.softWareList}" />
</t:jscookMenu></h:form><f:verbatim>
</div>
</div>
<div id="myaccountsidebar3blank"></div>
<div id="myaccountsidebar3"style=" padding:1px;">
<div class="note" id="tab">Top 10 Software</div></f:verbatim>
<h:dataTable var="sale" value="#{softWareSaleBean.saleList}" styleClass="blue12">
<h:column>
<h:graphicImage value="/page/purchase/images/list_number_#{(softWareSaleBean.picnum)}.gif" ></h:graphicImage>
<h:outputLink value="#{facesContext.externalContext.requestContextPath}/page/purchase/software.jsf" >
<h:outputText value="#{sale[1]}" />
<f:param name="id" value="#{sale[0]}" />
</h:outputLink>
</h:column>
</h:dataTable><f:verbatim>
</div>
</f:verbatim>



产生jscookMenu的bean,如下: a.jsp对应的bean a.java
public class SoftMenuList {
private SoftWareCategoryDao dao;
private List menuList = new ArrayList();
private List purchaseList = new ArrayList();
private List nextList = null;
private int size = 0;

public SoftMenuList(){}

/**
* 主方法，得到所有分类的列表
*/
public List getSoftMenuList(){
if(menuList.size() > 0){
return menuList;
}else{
List tempList = dao.getTopLevel();
if(null != tempList){
Iterator it = tempList.iterator();
TbSoftwareCategories tempSoft = null;
NavigationMenuItem tempItem = null;
while(it.hasNext()){
tempSoft = (TbSoftwareCategories)it.next();
nextList = dao.getNextLevel(tempSoft.getId());
if(nextList != null)size = nextList.size();
tempItem = getMenuNaviagtionItem(tempSoft.getName(),null,
tempSoft.getId(),size);
menuList.add(tempItem);
loadNextMenu(tempSoft.getId(),tempItem);
}
}

}
return menuList;
}

/**
* 递归加载分类菜单项
* @param parentId 父级编号
* @param item 菜单项
*/
private void loadNextMenu(Long parentId,NavigationMenuItem item){
List tempList = dao.getNextLevel(parentId);
if(null != tempList){
Iterator it = tempList.iterator();
TbSoftwareCategories tempSoft = null;
NavigationMenuItem tempItem = null;
while(it.hasNext()){
size = 0;
tempSoft = (TbSoftwareCategories)it.next();
nextList = dao.getNextLevel(tempSoft.getId());
if(nextList != null)size = nextList.size();
tempItem = getMenuNaviagtionItem(tempSoft.getName(),null,
tempSoft.getId(),size);
item.add(tempItem);
loadNextMenu(tempSoft.getId(),tempItem);
}
}
}

/**
* 实例一个菜单项,并设置该菜单属性
* @param label 显示的菜单名
* @param action 该菜单的动作
* @param id 该菜单的值
* @return 返回一个NavigationMenuItem的菜单对象
*/
private static NavigationMenuItem getMenuNaviagtionItem(String label,
String action,Long id,int _size){
NavigationMenuItem item = new NavigationMenuItem(label, action);
item.setValue(id);
if(_size == 0){
item.setAction("#{softWareListBean.toSoftwarelist}");
item.setActionListener("#{softWareListBean.menuListener}");
}
return item;
}

public void setDao(SoftWareCategoryDao _dao){
dao = _dao;
}

}

此页是当点击jscookmenu组件后,所跳转到的页面 b.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>
<%@ taglib prefix="tiles" uri="http://struts.apache.org/tags-tiles"%>
<f:verbatim>
<div id="myaccountmainbody3">
<div style="padding:0px 0 10px 0">
<div class="bar" id="position" style="background:url(images/in.jpg) no-repeat 110px 40% ">Purchase</div>
<div id="line1"></div>
</div>
</f:verbatim>
<h:form>
<h:inputHidden id="id" value="#{softWareListBean.id}"/>
<h:dataTable var="product" value="#{softWareListBean.productList}" styleClass="tablebody" rowClasses="softlist,softlist2" headerClass="head" cellpadding="1" cellspacing="1">

<h:column id="a">
<f:facet name="header"><h:outputText value="Name"/></f:facet>
<h:outputLink value="#{facesContext.externalContext.requestContextPath}/page/purchase/software.jsf" >
<h:outputText value="#{product.name}"/>
<f:param name="id" value="#{product.id}"/>
</h:outputLink>

</h:column>


<h:column>
<f:facet name="header"><h:outputText value="Rating"/></f:facet>
<h:graphicImage url="../myaccount/images/s.gif"/>
<h:outputText value="#{product.SRating}"/>
<h:graphicImage url="../myaccount/images/u.gif"/>
<h:outputText value="#{product.URating}"/>
</h:column>


<h:column>
<f:facet name="header"><h:outputText value="Credit"/></f:facet>
<h:graphicImage url="../myaccount/images/credit_07.jpg"/>
<h:outputText value="#{product.credits}"/>
</h:column>


<h:column>
<f:facet name="header"><h:outputText value="Date Added"/></f:facet>
<h:outputText value="#{product.dateAdded}">
<f:convertDateTime dateStyle="both" pattern="MM/dd/yyyy"/>
</h:outputText>
</h:column>


<h:column>
<h:commandLink value="Add" action="#{shoppingCartBean.ShoppingNavigater}">
<f:param name="id" value="#{product.id}"/>
<f:param name="credits" value="#{product.credits}"/>
</h:commandLink>
</h:column>
</h:dataTable>
</h:form>
<f:verbatim>
<div style="padding-top:10px;">
<table width="100%" height="25" border="0" cellpadding="0" cellspacing="0" bgcolor="#CCCCCC">
<tr>
<td valign="middle" style="padding-right:10;">
</td>
</tr>
</table>
</div>
</div>
</f:verbatim>


b.jsp所对应的bean b.java
public class SoftWareListBean{
//属性
private Long id ;
private Page page = new Page();
private SoftWareProductDao softWareProductDao;
private List productList = null;

public List getProductList() {
productList = softWareProductDao.getSoftwareList(this.getId());
return productList;
}
public void setProductList(List productList) {
this.productList = productList;
}
/**
* 导航器
* @return
*/
public String toSoftwarelist(){
return "softwarelist";
}


/**
* 监听器
* @param event
* @return
*/
public void menuListener(ActionEvent event){
if(event.getComponent() instanceof HtmlCommandJSCookMenu){
String tmp_id = (String)((HtmlCommandJSCookMenu)event
.getComponent()).getValue();
this.setId(new Long(tmp_id));
}
}

public SoftWareProductDao getSoftWareProductDao() {
return softWareProductDao;
}
public void setSoftWareProductDao(SoftWareProductDao
softWareProductDao) {
this.softWareProductDao = softWareProductDao;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}

faces的配置文件
<managed-bean>
<managed-bean-name>softWareListBean</managed-bean-name>
<managed-bean-class>
com.spotmau.purchase.view.SoftWareListBean
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
<managed-property>
<property-name>id</property-name>
<value>#{param.id}</value>
</managed-property>
<managed-property>
<property-name>softWareProductDao</property-name>
<value>#{softWareProductDao}</value>
</managed-property>
</managed-bean>

<navigation-rule>
<from-view-id>*</from-view-id>
<navigation-case>
<from-outcome>softwarelist</from-outcome>
<to-view-id>/softwarepagelist.jsf</to-view-id>
</navigation-case>
</navigation-rule>