使用Apache MyFaces 2.0时出现无限循环/ StackOverflowError

Question

我只是想尝试使用Tomcat 6.0来尝试JSF 2.0（MyFaces 2.0）。 我对JSF完全陌生。 我只是在应用程序根目录中放置了一个静态xhtml作为test.jsf 。 当请求URL时，将始终抛出StackOverflowError ：

 java.lang.StackOverflowError
 at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.<init>(ApplicationHttpRequest.java:904)
 at org.apache.catalina.core.ApplicationHttpRequest.getAttributeNames(ApplicationHttpRequest.java:243)
 at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.<init>(ApplicationHttpRequest.java:905)
 at org.apache.catalina.core.ApplicationHttpRequest.getAttributeNames(ApplicationHttpRequest.java:243)
 at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.<init>(ApplicationHttpRequest.java:905)

（重复多次，但是：）

 at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.<init>(ApplicationHttpRequest.java:905)
 at org.apache.catalina.core.ApplicationHttpRequest.getAttributeNames(ApplicationHttpRequest.java:243)
 at org.apache.myfaces.context.servlet.RequestMap.getAttributeNames(RequestMap.java:66)
 at org.apache.myfaces.util.AbstractAttributeMap.isEmpty(AbstractAttributeMap.java:100)
 at org.apache.myfaces.renderkit.ErrorPageWriter._writeVariables(ErrorPageWriter.java:558)
 at org.apache.myfaces.renderkit.ErrorPageWriter._writeVariables(ErrorPageWriter.java:538)
 at org.apache.myfaces.renderkit.ErrorPageWriter.debugHtml(ErrorPageWriter.java:259)
 at org.apache.myfaces.renderkit.ErrorPageWriter.debugHtml(ErrorPageWriter.java:221)
 at org.apache.myfaces.renderkit.ErrorPageWriter.handleThrowable(ErrorPageWriter.java:384)
 at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:102)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
 at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
 at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
 at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
 at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:439)
 at org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:115)
 at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:103)
 at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:207)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:191)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
 at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
 at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
 at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
 at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:439)
 at org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:115)
 at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:103)
 at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:207)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:191)

（也重复了多次...）

我做错了什么？

Answer 1

HTTP Servlet请求期间的StackOverflowError表示Servlet /过滤器映射中的无限递归。 您的FacesServlet如何映射？ 应该将其映射为侦听*.jsf的url-pattern ，而不是 *.xhtml （这是启动程序的常见错误）。 否则它将以递归方式调用自身。 实际文件应命名为*.xhtml 。 您只需在URL *.jsf其称为*.jsf 。 请仔细查阅/参考JSF 2.0 书籍 / 教程 / 文档，了解如何正确配置/使用JSF。