如何将动作结果传递给 jsf 组合？

Question

我有这个 JSF 片段，它运行良好。单击命令按钮时，它应该通过重定向到自身来重新加载页面。

<p:dataTable value="#{fileModel.files}" 
            var="file" scrollable="true" scrollHeight="400">
    <p:column headerText="#{msgs.lbl_file}">
        #{file.name}
    </p:column>
    <p:column width="150">
        <p:commandButton value="#{msgs.lbl_import}" 
            actionListener="#{fileModel.importFile(file, module)}"
            **action="mypage.jsf?faces-redirect=true"**/>
    </p:column>
    <p:column width="150">
        <p:commandLink value="#{msgs.lbl_view}" target="_blank" ajax="false"
            actionListener="#{fileModel.view(file)}"/>
    </p:column>
</p:dataTable>

因为我想在多个页面中重复使用它，所以我尝试制作这个 JSF 模板并通过 ui:include 包含它。唯一的问题是我需要根据使用的页面来配置操作。

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
                xmlns:p="http://primefaces.org/ui">
    <p:dataTable value="#{fileModel.files}" 
                var="file" scrollable="true" scrollHeight="400">
        <p:column headerText="#{msgs.lbl_file}">
            #{file.name}
        </p:column>
        <p:column width="150">
            <p:commandButton value="#{msgs.lbl_import}" 
                actionListener="#{fileModel.importFile(file, module)}"
                **action="#{redirectTo}"**/>
        </p:column>
        <p:column width="150">
            <p:commandLink value="#{msgs.lbl_view}" target="_blank" ajax="false"
                actionListener="#{fileModel.view(file)}"/>
        </p:column>
    </p:dataTable>
</ui:composition>

包含

<ui:include src="moduleSettingImportDialog.xhtml">
  <ui:parameter name="redirectTo" value="mypage.jsf?faces-redirect=true"/>
</ui:include>

我得到的错误类似于

javax.el.ELException: Not a Valid Method Expression: #{redirectTo} at com.sun.el.lang.ExpressionBuilder.createMethodExpression(ExpressionBuilder.java:311) at com.sun.el.ExpressionFactoryImpl.createMethodExpression(ExpressionFactoryImpl.java:96) at org.jboss.weld.util.el.ForwardingExpressionFactory.createMethodExpression(ForwardingExpressionFactory.java:43) at org.jboss.weld.el.WeldExpressionFactory.createMethodExpression(WeldExpressionFactory.java:53) at com.sun.faces.facelets.tag.TagAttributeImpl.getMethodExpression(TagAttributeImpl.java:240) at com.sun.faces.facelets.tag.jsf.ActionSourceRule$ActionMapper2.applyMetadata(ActionSourceRule.java:107) at com.sun.faces.facelets.tag.MetadataImpl.applyMetadata(MetadataImpl.java:81)

我在使用 JSF 复合组件时遇到类似的错误。

<c:interface>
    <c:attribute name="module"/>
    <c:attribute name="redirectTo" type="java.lang.String"/>
</c:interface>

<c:implementation rendered="#{systemSettingModel.LOG_REASON_FOR_CHANGES_ISAKTIV}">
    <p:dataTable value="#{fileModel.files}" 
                var="file" scrollable="true" scrollHeight="400">
        <p:column headerText="#{msgs.lbl_file}">
            #{file.name}
        </p:column>
        <p:column width="150">
            <p:commandButton value="#{msgs.lbl_import}" 
                actionListener="#{fileModel.importFile(file, cc.attrs.module)}"
                **action="#{cc.attrs.redirectTo}"**/>
        </p:column>
        <p:column width="150">
            <p:commandLink value="#{msgs.lbl_view}" target="_blank" ajax="false"
                actionListener="#{fileModel.view(file)}"/>
        </p:column>
    </p:dataTable>
</c:implementation>

#{cc.attrs.redirectTo}: javax.el.ELException: java.lang.IllegalArgumentException: Cannot convert multimodulesettings.jsf?faces-redirect=true&includeViewParams=true of type class java.lang.String to class javax.el.MethodExpression javax.faces.FacesException: #{cc.attrs.redirectTo}: javax.el.ELException: java.lang.IllegalArgumentException: Cannot convert multimodulesettings.jsf?faces-redirect=true&includeViewParams=true of type class java.lang.String to class javax.el.MethodExpression at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) at javax.faces.component.UICommand.broadcast(UICommand.java:315) at javax.faces.component.UIData.broadcast(UIData.java:1108) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:344) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:78) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:295)

如何将固定字符串传递给在 commandButton 的 action 属性中使用的 JSF 模板或复合组件？

Answer 1

作为一种解决方法，我实现了一个 JSF bean 方法，它只是 returns 传入的字符串，就像这样。

public String echo(String s) {
    return s;
}

然后不是将修复字符串作为参数传递给组件，而是通过 EL 表达式传递它。

<ui:include src="moduleSettingImportDialog.xhtml">
  <ui:parameter name="redirectTo" value="#{jsfBean.echo('mypage.jsf?faces-redirect=true')}"/>
</ui:include>

如何将动作结果传递给 jsf 组合？

How to pass around action outcome to jsf composition?

jsf

glassfish-4