javax.faces.FacesException:java.lang.RuntimeException:找不到FacesContext [英] javax.faces.FacesException: java.lang.RuntimeException: Cannot find FacesContext

问题描述

我正在尝试一个简单的项目来在jboss上工作，但是我陷入了这个错误(我已经尝试在URL上使用.jsf). Tomcat工作正常的应用程序

I'm trying a simple project to work on jboss, but I'm stuck at this error (I already tried using .jsf on the URL). the application in tomcat work's fine

javax.servlet.ServletException: java.lang.RuntimeException: Cannot find FacesContext
 javax.faces.webapp.FacesServlet.service

root cause

javax.faces.FacesException: java.lang.RuntimeException: Cannot find FacesContext
 org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:425)
 org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:211)
 org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
 org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
 javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
 org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96

我的web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
         version="2.4">
 <listener>
  <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
 </listener> 

<servlet>
    <servlet-name>javax.faces.FacesServlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>javax.faces.FacesServlet</servlet-name>
    <url-pattern>*.faces</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>faces-redirect-filter</filter-name>
    <filter-class>core.FacesRedirectFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>faces-redirect-filter</filter-name>
    <url-pattern>*.jsp</url-pattern>
  </filter-mapping>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.html</welcome-file>
  </welcome-file-list>
</web-app>

faces-config xml

faces-config xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE faces-config PUBLIC
"-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN"
"http://java.sun.com/dtd/web-facesconfig_1_1.dtd">    

<faces-config>
  <managed-bean>
    <managed-bean-name>resumeBean</managed-bean-name>
    <managed-bean-class>core.ResumeBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
  </managed-bean>
  <managed-bean>
    <managed-bean-name>colorBean</managed-bean-name>
    <managed-bean-class>core.ColorBean</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
  </managed-bean>
  <navigation-rule>
    <from-view-id>/customize.jsp</from-view-id>
    <navigation-case>
      <from-outcome>same-color</from-outcome>
      <to-view-id>/WEB-INF/results/same-color.jsp</to-view-id>
    </navigation-case>
    <navigation-case>
      <from-outcome>success</from-outcome>
      <to-view-id>/WEB-INF/results/show-preview.jsp</to-view-id>
    </navigation-case>
  </navigation-rule>
  <navigation-rule>
    <from-view-id>/customize-bg.jsp</from-view-id>
    <navigation-case>
      <from-outcome>success</from-outcome>
      <to-view-id>/WEB-INF/results/show-preview2.jsp</to-view-id>
    </navigation-case>
  </navigation-rule>
</faces-config>

推荐答案

javax.faces.FacesException:java.lang.RuntimeException:找不到FacesContext

javax.faces.FacesException: java.lang.RuntimeException: Cannot find FacesContext

JSP页面中的

JSF组件抱怨找不到FacesContext.负责创建此代码的是FacesServlet.

JSF components in the JSP page are complaining that the FacesContext cannot be found. The one responsible for creating this is the FacesServlet.

在这里

<servlet-mapping>
    <servlet-name>javax.faces.FacesServlet</servlet-name>
    <url-pattern>*.faces</url-pattern>
</servlet-mapping>

您已声明FacesServlet来收听*.faces的url-pattern.因此，要使FacesServlet运行(并创建FacesContext)，您需要确保请求URL与 http://example.com/context/page.jsp .

you've declared the FacesServlet to listen on an url-pattern of *.faces. So, to get the FacesServlet to run (and to create the FacesContext) you need to ensure that the request URL matches http://example.com/context/page.faces and thus not http://example.com/context/page.jsp.

如果您想使用 http://example.com/context/page.jsf，那么您需要将FacesServlet的url-pattern更改为*.jsf.

If you rather want to use http://example.com/context/page.jsf, then you need to change the url-pattern of the FacesServlet to *.jsf.

也就是说，FacesRedirectFilter也可疑.是不是将*.jsp重定向到*.jsf?如果是这样，那么您还需要修改该过滤器.但是，如果唯一的目的是防止用户直接访问*.jsp文件而不涉及FacesServlet，则最好在web.xml上添加以下安全约束:

That said, the FacesRedirectFilter is suspicious as well. Isn't it redirecting *.jsp to *.jsf or so? If so, then you need to modify that filter as well. However, if the sole intent is to prevent users from accessing *.jsp files directly without involvement of FacesServlet, then better add the following security constraint to the web.xml:

<security-constraint>
    <display-name>Restrict direct access to JSP files</display-name>
    <web-resource-collection>
        <web-resource-name>JSP files</web-resource-name>
        <url-pattern>*.jsp</url-pattern>
    </web-resource-collection>
    <auth-constraint />
</security-constraint> 

(并删除该Filter).

与该问题无关，您提到了JSF 1.2，但是您已将faces-config.xml声明为JSF 1.1.任何JSF 1.2或更高版本的实现都将回落到JSF 1.1兼容性.您还需要将其声明为JSF 1.2.

Unrelated to the problem, you mentioned JSF 1.2, but you've declared your faces-config.xml as JSF 1.1. Any JSF 1.2 implementation or newer will fall back to JSF 1.1 compatibility. You need to declare it as JSF 1.2 as well.

<faces-config version="1.2" 
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xi="http://www.w3.org/2001/XInclude"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">

(并摆脱该DOCTYPE)

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