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在第一种形式中，我有一个 primefaces 多选树（从 LDAP 填充），在另一种形式中，我有一个 selectOneMenu primefaces 组件。我想将默认的 selectOneMenu 值（此菜单上显示的第一个值）设置为树选择节点的值。我尝试使用 f:ajax .. 但它不起作用，因为这些元素不属于同一表单（渲染属性中的 selectOneMenu 名称是未知的..）

这是我的 index.xhtml，其中包含所有这些元素：

 <?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:p="http://primefaces.org/ui"
    xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
    <title>Insert title here</title>
    <script src="JS/general.js" type="text/javascript"></script>
    <link rel="stylesheet" type="text/css" href="CSS/general.css" />
    <script src="clean/clean-ajax-all.js"></script>
    <script>
        var crudmenu = "crudmenu";
        var adduserform = "adduserform";
    </script>
</h:head>
<body>

    <h:form id="form">

        <p:growl id="messages" showDetail="true" escape="false" />

        <p:tree value="#{treeBean.root}" var="node"
            onNodeClick="this.form.submit();" selectionMode="multiple"
            selection="#{treeBean.selectedNodes}" id="treeMultiple">

            <p:treeNode>
                <h:outputText value="#{node}" />
            </p:treeNode>
        </p:tree>


        <p:commandButton value="Display Selected" update="messages"
            actionListener="#{treeBean.displaySelectedMultiple}" id="btnDisplay" rendered="false"/>  

    </h:form>


    <div id="adduserform" name="adduserform"
        style="text-align: center; overflow: hidden; height: 0px; width: 270px; border: #040600 1px;">


        <h:form>
            <h:panelGrid border="1" columns="2">
            ID :  <p:selectOneMenu value="" panelStyle="width:150px"
                    effect="fade" var="p" style="width:160px" filter="true"
                    filterMatchMode="startsWith">
                    <f:selectItem itemLabel="#{treeBean.selectedNodeValue}"
                        itemValue="" />

                </p:selectOneMenu> 


    objectClass : <p:selectOneMenu value="" panelStyle="width:150px"
                    effect="fade" var="p" style="width:160px" filter="true"
                    filterMatchMode="startsWith">
                    <f:selectItem itemLabel="Select One" itemValue="" />

                </p:selectOneMenu>


            </h:panelGrid>
        </h:form>
    </div>



</body>
</html>

这是我的托管bean：

package org.primefaces.examples.view;

import java.io.Serializable;

import javax.faces.application.FacesMessage;
//other imports..

@ManagedBean(name = "treeBean")
public class TreeBean implements Serializable {


    private TreeNode root;

    private TreeNode[] selectedNodes;

    private String selectedNodeValue;


    public TreeBean() {

        populateTreeFromLdap();

    }


    public String getSelectedNodeValue() {
        if (selectedNodes != null && selectedNodes.length == 1)
            for (TreeNode node : selectedNodes)
            selectedNodeValue = node.getData().toString(); 
        return selectedNodeValue;
    }


    public void setSelectedNodeValue(String selectedNodeValue) {
        this.selectedNodeValue = selectedNodeValue;
    }


    public void populateTreeFromLdap(){
     //code to get entries from LDAP..
            }               


    }

    public TreeNode getRoot() {
        return root;
    }

    public TreeNode[] getSelectedNodes() {
        return selectedNodes;
    }

    public void setSelectedNodes(TreeNode[] selectedNodes) {
        this.selectedNodes = selectedNodes;
    }

    public void displaySelectedMultiple(ActionEvent event) {
        if (selectedNodes != null && selectedNodes.length > 0) {
            StringBuilder builder = new StringBuilder();

            for (TreeNode node : selectedNodes) {
                builder.append(node.getData().toString());
                builder.append("<br />");
            }

            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO,
                    "Selected", builder.toString());

            FacesContext.getCurrentInstance().addMessage(null, message);
        }
    }
}

问题是如何在树节点选择发生后刷新 selectOneMenu 的 itemLabel 的“#{treeBean.selectedNodeValue}”。

顺便说一句，我是 jsf 的新手，我真的很沮丧，传统的 ajax 用于从另一个页面加载 div 中的内容在 jsf 中不再起作用..我在以前的一些 jsp/servlet 应用程序中使用它并且它工作正常..

谢谢帮助！

4

1 回答 1

1

If I understand what you are trying to do, I would next bind the selectOneMenu to a value on the backing bean. In your getSelectedNodeValue() I would set that value. The final piece to make this work is to use an listener events as shown here: primefaces.org/showcase-labs/ui/treeEvents.jsf.

于 2012-10-15T12:10:45.570 回答