我在客户端很粗鲁，所以对于在 JSF 中比我更有基础的人来说，这可能是一个非常容易的问题（非常非常容易！：D），但我有些天失去了理智.. 幸运的是我的空闲时间。但我在那个（死）点需要帮助。请帮忙，否则我会整晚都粘在键盘上！
我制作了一个带有两个表单的 .xhtml 页面，第二个页面指向一个会话 Bean，它初始化要创建的对象并重定向到带有表单的页面，以便为其变量赋值。
这是第一个 .xhtml 页面：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>Modify A Cafeteria Element</title>
</h:head>
<h:body>
<f:view>
<h:form>
<h1><h:outputText value="Modify A Cafeteria Element"/></h1>
<h:panelGrid columns="2">
<h:outputLabel value="Description:" for="description" />
<h:inputText id="description" value="#{cafeteriaElementBean.cafeteriaElement.description}" title="Description" />
</h:panelGrid>
<p:commandButton action="#{cafeteriaElementBean.saveOrEdit()}" value="Save" />
<p:commandButton action="#{cafeteriaElementBean.edit()}" value="Edit" />
<p:button outcome="cafeteriaElementList" value="Back" />
</h:form>
</f:view>
<br/>
#{cafeteriaElementBean.cafeteriaElement.description} periodicity list:
<br/>
<f:view>
<h:form>
<h1><h:outputText value="List"/></h1>
<h:dataTable value="#{elementPeriodBean.filteredPerElement(cafeteriaElementBean.cafeteriaElement)}" var="item">
<h:column>
<f:facet name="header">
<h:outputText value="MaxAbsoluteForPeriod"/>
</f:facet>
<h:outputText value="#{item.maxAbsoluteForPeriod}"/>
</h:column>
<!-- code omissed for brevity-->
</h:dataTable>
<p:commandButton action="#{elementPeriodBean.create(cafeteriaElementBean.cafeteriaElement)}" value="Add a new Periodicity"/>
</h:form>
</f:view>
</h:body>
</html>
这是它的打印屏幕
单击“新周期”按钮驱动无效：调试器没有检测到它，服务器终端没有写入任何内容。浏览器都不会重定向到第二页。:(
会话 Bean如下：（有一些删减）
package com.cafeteria.business;
import com.cafeteria.facades.ElementPeriodFacade;
import com.cafeteria.model.CafeteriaElement;
import java.util.List;
import javax.inject.Inject;
import javax.inject.Named;
import com.cafeteria.model.ElementPeriod;
import java.io.Serializable;
import javax.enterprise.context.SessionScoped;
@Named
@SessionScoped
public class ElementPeriodBean implements Serializable, CRUD <ElementPeriod>{
private ElementPeriod elementPeriod;
@Inject
ElementPeriodFacade elementPeriodFacade;
public List <ElementPeriod> getAll(){
return elementPeriodFacade.findAll();
}
public List <ElementPeriod> filteredPerElement(CafeteriaElement cafeteriaElement){
return elementPeriodFacade.findForElement(cafeteriaElement);
}
public String create(){
this.elementPeriod = new ElementPeriod();
return "newElementPeriod";
}
public String create(CafeteriaElement cafeteriaElement){
this.elementPeriod = new ElementPeriod();
this.elementPeriod.setCafeteriaElement(cafeteriaElement);
return "newElementPeriod";
}
public String modify(ElementPeriod elementPeriod){
this.elementPeriod = elementPeriod;
return "newElementPeriod";
}
public String saveOrEdit(){
elementPeriodFacade.create(elementPeriod);
return "editCafeteriaElement";
}
public String edit(){
elementPeriodFacade.edit(elementPeriod);
return "editCafeteriaElement";
}
public String remove(ElementPeriod elementPeriod){
elementPeriodFacade.remove(elementPeriod);
return "editCafeteriaElement";
}
public ElementPeriod find(Long id){
return elementPeriodFacade.find(id);
}
public ElementPeriod getElementPeriod() {
if(this.elementPeriod== null) this.elementPeriod = new ElementPeriod();
return this.elementPeriod;
}
public void setElementPeriod(ElementPeriod elementPeriod) {
this.elementPeriod = elementPeriod;
}
}
这是插入数据的表单页面：
<?xml version="1.0" encoding="UTF-8"?>
<!--
To change this template, choose Tools | Templates
and open the template in the editor.
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>Create periodicity for Cafeteria Element</title>
</h:head>
<h:body>
<f:view>
<h:form>
<h1><h:outputText value="Create/Edit Periodicity for #{cafeteriaElementBean.cafeteriaElement.description}"/></h1>
<h:panelGrid columns="2">
<h:outputLabel value="Periodicity:" for="periodicity" />
<h:selectOneMenu id="periodicity" value="#{elementPeriodBean.elementPeriod.periodicity}" title="Periodicity" >
<!-- TODO: update below reference to list of available items-->
<f:selectItems value="#{periodicityBeam.all}"/>
</h:selectOneMenu>
<h:outputLabel value="MaxAbsoluteForPeriod:" for="maxAbsoluteForPeriod" />
<h:inputText id="maxAbsoluteForPeriod" value="#{elementPeriodBean.elementPeriod.maxAbsoluteForPeriod}" title="MaxAbsoluteForPeriod" />
<h:outputLabel value="MaxPercentageForPeriod:" for="maxPercentageForPeriod" />
<h:inputText id="maxPercentageForPeriod" value="#{elementPeriodBean.elementPeriod.maxPercentageForPeriod}" title="MaxPercentageForPeriod" />
<h:outputLabel value="FixValue:" for="fixValue" />
<h:inputText id="fixValue" value="#{elementPeriodBean.elementPeriod.fixValue}" title="FixValue" />
</h:panelGrid>
<p:commandButton value="Save" action="#{elementPeriodBean.saveOrEdit()}"/>
<!--p:button outcome="editCafeteriaElement" value="Back" /-->
</h:form>
</f:view>
</h:body>
</html>
注意： - newElementPeriod 正确地从 faces-config.xml 指向此处的第一页 - newElemelPeriod.xhtml 无论是否直接从浏览器调用都可用 - 其他按钮有效：并非无处不在，因为有些按钮的行为与此类似
请帮忙！我快疯了！
提前谢谢你，安德里亚