java.lang.IllegalStateException：组件javax.faces.component.UIViewRoot不是预期的类型
[英]java.lang.IllegalStateException: Component javax.faces.component.UIViewRoot not expected type
问题描述
I have a JSP file with JSF components index.jsp : 
我有一个包含JSF组件index.jsp的JSP文件：
<body>
<h:form prependId="false">
<h:panelGrid id="panelLogin" columnClasses="colLabel,colValor" columns="2">
<f:facet name="header">
<h:outputText value="Panel de Log-In" />
</f:facet>
<h:outputLabel value="Usuario" for="txtNombre" />
<h:inputText id="txtNombre" value="#{manejadorLogin.usuario}" />
<h:outputLabel value="Password" for="txtPassword" />
<h:inputText id="txtPassword" value="#{manejadorLogin.password}" />
<f:facet name="footer">
<h:panelGrid columns="2">
<h:commandButton value="Login" action="#{manejadorLogin.loginUsuario}" />
<h:commandButton value="Limpiar" type="reset" />
</h:panelGrid>
</f:facet>
</h:panelGrid>
</h:form>
</body>
When I press the "Login" button, I get this error: 当我按下“登录”按钮时，出现此错误：
An Error Occurred: java.lang.IllegalStateException: Component javax.faces.component.UIViewRoot@7cf94d3b not expected type.
How is this caused and how can I solve it? 这是怎么引起的，我该如何解决？
1 个解决方案
解决方案1
5 已采纳 2011-12-08 19:02:24
An Error Occurred: java.lang.IllegalStateException: Component javax.faces.component.UIViewRoot@7cf94d3b not expected type.
The <f:view> tag is missing in the JSP file where this action is navigating to. 此操作导航到的JSP文件中缺少<f:view>标记。 If you're using legacy JSP as view technology instead of its successor Facelets, then you need to make sure that all JSF components are enclosed inside a parent <f:view> tag (which is behind the scenes represented by UIViewRoot component). 如果您使用遗留的JSP作为视图技术而不是其后继的Facelets，则需要确保所有JSF组件都包含在父<f:view>标记内（该标记位于UIViewRoot组件所代表的幕后）。
You need to change your JSP file to match the following basic template (note the <f:view> ): 您需要更改JSP文件以匹配以下基本模板（请注意<f:view> ）：
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE html>
<f:view>
<html lang="en">
<head>
<title>JSP page with JSF components</title>
</head>
<body>
<h:outputText value="JSF components here." />
</body>
</html>
</f:view>
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