jsf自定义转换器 [英] jsf custom converter

问题描述

我是jsf 2.0和spring 3.0的新手，我要求在jsf 2.0中使用自定义转换器.但是当我访问我的xhtml页面时，它却显示出异常，无法识别 未找到命名对象".我已经为自定义转换器使用了@FacesConverter批注，它在h:selectOneMenu中使用.但是我遇到了错误.在此方面有什么帮助吗?

I'm new to jsf 2.0 and spring 3.0 , i have a requirement to use custom converter in jsf 2.0.But it is not recognized,when i access my xhtml page it is showing an exception "Named object not found" .I had used @FacesConverter annotation for the custom converter and it is using in the h:selectOneMenu.But i'm getting the error.could any one help in this...

@FacesConverter("selectItemsConverter")
public class SelectItemsConverter implements Converter {
public Object getAsObject(FacesContext context, UIComponent component, String value) {

}
public String getAsString(FacesContext context, UIComponent component, Object value) {

}

}

h:selectOne菜单代码如下:

h:selectOne Menu code is as follows:

<h:selectOneMenu style="width:100px;height:24px;" rendered ="#{row.edit}" value="#{row.modelo.country}" converter="selectItemsConverter" required="true" requiredMessage="#{msg['veci.admin.ccaa.pais.empty']}">
<f:selectItems value="#{communityView.countries}" var="con" itemLabel="#{con.nombrePais}"/>
</h:selectOneMenu>

谢谢大家……..

推荐答案

如果要通过ConverterID调用转换器，则需要按以下方式更改代码:

If you want to call the converter by its converterID you need to change your code as follows:

<h:selectOneMenu style="width:100px;height:24px;" 
                 rendered ="#{row.edit}" 
                 value="#{row.modelo.country}" 
                 required="true" 
                 requiredMessage="#{msg['veci.admin.ccaa.pais.empty']}">
    <f:converter converterId="selectItemsConverter"/>
    <f:selectItems .../>
</h:selectOneMenu>

h:selectOneMenu的转换器属性需要一个完全限定的类名称，例如:

The converter attribute of the h:selectOneMenu needs a fully qualified class name such as:

<h:inputText
    converter="javax.faces.convert.IntegerConverter" />

如果要为转换器提供自定义ID，请使用value参数:

If you want to give your converter a custom id use the value parameter:

@FacesConverter(value="selectItemsConverter")

这篇关于jsf自定义转换器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！