Jsf 2.0填充h：selectOneMenu进入页面
[英]Jsf 2.0 Populate h:selectOneMenu to access page
问题描述
I am newbie in JSF 2.0, I worked in JSF 1.1 and 1.2 and I populate selectOneMenu in constructor of Managed bean's page. 
我是JSF 2.0的新手，我在JSF 1.1和1.2中工作，并且在Managed bean页面的构造函数中填充selectOneMenu。 For when users to acces to page the List is populate. 当用户访问页面时，将填充列表。 example below. 下面的例子。 I put the same in JSF 2.0 but is not work, the selectOneMenu appears empty. 我在JSF 2.0中添加了相同的内容，但无法正常工作，selectOneMenu显示为空。
<h:selectOneMenu id="cboStatus" value="#{PersonBean.idStatus}">
<f:selectItems value="#{PersonBean.status}"/>
</h:selectOneMenu>
In constructor's managed bean I put: 在构造函数的托管bean中，我输入：
public class PersonBean {
private SelectItem[] status=new SelectItem[0];
public PersonBean () {
detallePersonas= new ArrayList();
status= new SelectItem[3];
status[0]=new SelectItem("S","Single");
status[1]=new SelectItem("M","Married");
status[2]=new SelectItem("D","Divorced");
}
}
- Editor Netbeans 6.8 (JSF 2.0 default configuration wizard) 编辑器Netbeans 6.8（JSF 2.0默认配置向导）
- No Exception Error 无异常错误
- Never run the constructor PersonBean (I put a breakpoint and never stops) 永远不要运行构造函数PersonBean（我放了一个断点，永不停止）
- There are other ways to populate selects to load the page 还有其他方法可以填充选择以加载页面
This is the complete code: 这是完整的代码：
index.xhtml 的index.xhtml
<?xml version='1.0' encoding='UTF-8' ?>
<!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:ui="http://java.sun.com/jsf/facelets">
<h:head>
<title>Person</title>
</h:head>
<h:body>
<h:form id="frmPerson">
<h:outputLabel id="lblStatus" value="Status:"/>
<h:selectOneMenu id="cboStatus" value="#{PersonBean.idStatus}">
<f:selectItems value="#{PersonBean.status}"/>
</h:selectOneMenu>
</h:form>
</h:body>
</html>
PersonBean.java PersonBean.java
package com.prueba.backingbean;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.model.SelectItem;
/**
*
* @author Administrador
*/
@ManagedBean(name = "Person")
@ViewScoped
public class PersonBean {
private String idStatus;
private SelectItem[] status = new SelectItem[0];
public PersonBean() {
status = new SelectItem[3];
status[0] = new SelectItem("S", "Single");
status[1] = new SelectItem("M", "Married");
status[2] = new SelectItem("D", "Divorced");
}
/**
* @return the idStatus
*/
public String getIdStatus() {
return idStatus;
}
/**
* @param idStatus the idStatus to set
*/
public void setIdStatus(String idStatus) {
this.idStatus = idStatus;
}
/**
* @return the status
*/
public SelectItem[] getStatus() {
return status;
}
/**
* @param status the status to set
*/
public void setStatus(SelectItem[] status) {
this.status = status;
}
}
4 个解决方案
解决方案1
2 2011-08-10 19:56:24
private Map<String,String>status = new HashMap<String,String>();
.......
status.put("S", "Single");
status.put("M", "Married");
status.put("D", "Divorced");
in JSF PAGE: 在JSF PAGE中：
<h:selectOneMenu value="#{personBean.idStatus}" >
<f:selectItems value="#{personBean.status}"/>
</h:selectOneMenu>
解决方案2
1 2010-09-09 07:23:24
It should be "personBean" instead of "PersonBean" (first letter should be lowercase). 它应该是“ personBean”而不是“ PersonBean”（首字母应小写）。 You also need getter for status ( getStatus() ) and setter/getter for idStatus ( setIdStatus() / getIdStatus() ). 您还需要状态的getter（ getStatus() ）和idStatus的setter / getter（ setIdStatus() / getIdStatus() ）。 Are they there? 他们在吗？
解决方案3
0 2010-09-09 13:50:26
Have you tried using List instead of Array of SelectItems. 您是否尝试过使用List而不是SelectItems数组。 Below code might help you. 下面的代码可能会帮助您。
private List<SelectItem> status = new ArrayList<SelectItem>();
status.add(new SelectItem("S","Single"));
status.add(new SelectItem("M","Married"));
status.add(new SelectItem("D","Divorced"));
/*
SETTER / GETTER
*/
解决方案4
0 已采纳 2010-09-11 00:46:24
Look here: 看这里：
@ManagedBean(name = "Person")
@ViewScoped
public class PersonBean {
You've declared the managed bean name as Person . 您已将托管bean名称声明为Person 。 So it's in JSF EL available as #{Person} . 因此它在JSF EL中以#{Person} 。 Yet you're attempting to access it as #{PersonBean} . 但是，您尝试以#{PersonBean}身份访问它。 Because such a bean does not exist, the menu remains empty. 由于不存在这样的bean，因此菜单保持为空。
You've 3 options: 您有3种选择：
Rename
#{PersonBean}by#{Person}in your JSF page.在您的JSF页面中用#{Person}重命名#{PersonBean}。Rename
@ManagedBean(name = "Person")to@ManagedBean(name = "PersonBean")in your managed bean.在托管bean中将@ManagedBean(name = "PersonBean")重命名@ManagedBean(name = "Person")@ManagedBean(name = "PersonBean")。Get rid of bean name and use the default JSF naming conventions.
摆脱bean名称，并使用默认的JSF命名约定。 Ie just use @ManagedBeanwithout anameand use#{personBean}in your JSF page (in essence, the bean's class name with first character lowercased).也就是说，只使用不带name@ManagedBean并在JSF页面中使用#{personBean}（本质上是使用第一个字符小写的Bean类名）。
Option 3 is preferred. 选项3是首选。
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