is it possible to access value bundle properties i

问题:

This is a part of my web-flow:

<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/webflow
        http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd"
    parent="estatGeneral" start-state="a_cargar_info">

    <attribute name="caption" value="consultaDeutesHandler.filAriadna" />

    <action-state id="a_cargar_info">
        <evaluate expression="consultaDeutesHandler.primeraCarrega(flowRequestContext, usuari)"></evaluate>
        <transition on="success" to="v_formulariDeutesInici"/>
        <transition on="error" to="error"/>
    </action-state>

I would like to insert text from a properties bundle or backing bean into an attribute. I tried this:

<attribute name="caption" value="consultaDeutesHandler.filAriadna" />

where consultaDeutesHandler.filAriadna is a function that returns a String. Instead of the expected value I just see "consultaDeutesHandler.filAriadna" literally.

Is there a way to set the value of an attribute from a properties bundle?

回答1:

The <attribute> tag will not work since it only supports plain strings, not EL expressions.

<set> should do the trick:

<set name="flowScope.caption" value="consultaDeutesHandler.filAriadna()" />

(Substitute requestScope, conversationScope, etc. for flowScope as appropriate.)

You can refer to this value later in the flow xml, and from your views. For a JSF example,

<div>#{caption}</div>

will ultimately contain the value returned from consultaDeutesHandler.filAriadna()