扩展JSF commandLink组件 | commandLink组件

本文介绍了扩展JSF commandLink组件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我创建了一个Facelet组件来扩展h:commandLink(以添加一些功能和圆角).

I created a Facelet component to extend h:commandLink (to add some functionality and rounded corners).

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
    <span class="btn-left btn-corners">&#160;</span>
    <span type="submit" class="submit">
        <h:commandLink id="#{id}" value="#{label}" action="#{action}" />
    </span>
    <span class="btn-right btn-corners">&#160;</span> </ui:composition>

可以使用

<my:commandLink id="continue" label="continue" action="#{applyBacking.submit}"/>

并且Java代码是

public String submit(){
    ...
}

但是它给我一个错误"ApplyBacking没有属性提交".我了解此错误的原因，因为在渲染my:commandLink时，它会尝试将#{applyBacking.submit}评估为某个属性.相反，我希望将有关被调用方法(applyBacking.submit)的方法的信息传递给模板，并在渲染h:commandLink时对其进行评估.

However it gives me an error "ApplyBacking does not have the property submit".I understand the reason for this error because while rendering my:commandLink, it tries to evaluate #{applyBacking.submit} to a property. Instead, I want the info about the method to the invoked (applyBacking.submit) to be passed to the template and evaluated while rendering h:commandLink.

有什么建议吗?

推荐答案

创建复合组件代替(教程)，它使您可以将bean动作定义为属性.

Create a composite component instead (tutorial here), it enables you to define bean actions as attribtues.

这是一个开球示例:

/resources/components/commandLink.xhtml

<ui:component
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:cc="http://java.sun.com/jsf/composite">
    <cc:interface>
        <cc:attribute name="id" required="true" />
        <cc:attribute name="label" required="true" />
        <cc:attribute name="action" method-signature="java.lang.String action()" required="true" />
    </cc:interface>
    <cc:implementation>
        <span class="btn-left btn-corners">&#160;</span>
        <span type="submit" class="submit">
            <h:commandLink id="#{cc.attrs.id}" value="#{cc.attrs.label}" action="#{cc.attrs.action}" />
        </span>
        <span class="btn-right btn-corners">&#160;</span>
    </cc:implementation>
</ui:component>

/somepage.xhtml

<!DOCTYPE html>
<html lang="en"
    xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:my="http://java.sun.com/jsf/composite/components">
    <h:head>
        <title>SO question 4608030</title>
    </h:head>
    <h:body>
        <h:form>
            <my:commandLink id="continue" label="continue" action="#{applyBacking.submit}"/>
        </h:form>
    </h:body>
</html>

顺便说一句，我个人更喜欢将JS/jQuery用于圆角部分，例如 jQuery角插件.只需为您的命令链接指定特定的styleClass，然后让JS发挥作用即可.

By the way, I would personally prefer using JS/jQuery for the rounded corners part, for example the jQuery corner plugin. Just give your commandlink a specific styleClass and let JS do the magic.

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