我無法讓preRenderView事件偵聽器在JSF 2.1中的GET請求上工作。JSF 2.1 preRenderEvent不適用於GET請求
我發現了很多關於它,但似乎沒有任何工作如:
Conditional redirection in JSF
http://andyschwartz.wordpress.com/2009/07/31/whats-new-in-jsf-2/#get-prerenderview-event
http://developer.am/j2eetutorial/jsf/?page=jsf-2-prerenderviewevent-example
JSF, Spring, and the PreRenderViewEvent
http://balusc.blogspot.dk/2011/09/communication-in-jsf-20.html#ProcessingGETRequestParameters
我有4個插入塊模板,我曾試圖在所有這些地方插入事件代碼,但沒有任何運氣。我已經嘗試使用和不使用圍繞它的f:metadata標籤。
<f:event type="preRenderView" listener="#{applicationData.redirectIfNoResults}" />
豆:
@ManagedBean
@ApplicationScoped
public class ApplicationData implements Serializable {
public void redirectIfNoResults() throws IOException {
if (getTotal() < 1) {
ExternalContext ec = FacesContext.getCurrentInstance().getExternalContext();
ec.redirect(ec.getRequestContextPath() + "/noResults.xhtml");
}
}
...
}
模板:
<?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:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<ui:insert name="beforeHeader" />
<f:view>
<ui:insert name="inView" />
</f:view>
<h:head>
<meta http-equiv="cache-control" content="no-store" />
<link href="style.css" rel="stylesheet" type="text/css" />
<title>Quick Poll</title>
<ui:insert name="header" />
</h:head>
<h:body>
<h1>Quick Poll</h1>
<ui:insert name="content" />
</h:body>
</html>
查看:
<ui:define name="content">
#{applicationData.question}?<p/>
<h:panelGrid columns="3" border="0">
Yes:
<h:panelGrid bgcolor="black" height="20" width="#{300*applicationData.yes/applicationData.total}"/>
#{applicationData.yes}
<h:outputText value="No:"/>
<h:panelGrid bgcolor="black" height="20" width="#{300*applicationData.no/applicationData.total}"/>
#{applicationData.no}
</h:panelGrid>
</ui:define>
</ui:composition>
請幫我弄清楚如何得到它的工作..
更新1:
通過BalusC的建議,但它仍然沒有工作,我已經修改..
模板:
<?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:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:head>
<meta http-equiv="cache-control" content="no-store" />
<link href="style.css" rel="stylesheet" type="text/css" />
<title>Quick Poll</title>
<ui:insert name="header" />
</h:head>
<h:body>
<h1>Quick Poll</h1>
<ui:insert name="content" />
</h:body>
</html>
查看:
<?xml version='1.0' encoding='UTF-8' ?>
<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:c="http://java.sun.com/jsp/jstl/core"
xmlns:f="http://java.sun.com/jsf/core"
template="template.xhtml">
<ui:define name="content">
<f:event listener="#{applicationData.redirectIfNoResults}" type="preRenderView"></f:event>
#{applicationData.question}?<p/>
<h:panelGrid columns="3" border="0">
Yes:
<h:panelGrid bgcolor="black" height="20" width="#{300*applicationData.yes/applicationData.total}"/>
#{applicationData.yes}
<h:outputText value="No:"/>
<h:panelGrid bgcolor="black" height="20" width="#{300*applicationData.no/applicationData.total}"/>
#{applicationData.no}
</h:panelGrid>
</ui:define>
</ui:composition>
這樣的說法是可選的,所以這個答案並不適用。 – BalusC
我以前也試過這個簽名,並且在文檔中發現我並不需要。我在beforeHeader標籤中再次嘗試過 - 沒有任何改變。你可以使用GET請求來處理頁面嗎?你能讓我的代碼工作嗎? –