在SeamViewHandler.calculateLocale JSF NullPointerException

我一直在嘗試讀取我的JSF webapp中的數據庫。我使用從BalusC代碼博客給予代碼：在SeamViewHandler.calculateLocale JSF NullPointerException

然而，當我建立的一切，我啓動它在Tomcat 6我得到這個錯誤（全stractrace）：

SEVERE: uncaught exception 
java.lang.NullPointerException 
    at org.jboss.seam.Component.getInstance(Component.java:1859) 
    at org.jboss.seam.Component.getInstance(Component.java:1852) 
    at org.jboss.seam.Component.getInstance(Component.java:1829) 
    at org.jboss.seam.web.Session.getInstance(Session.java:122) 
    at org.jboss.seam.contexts.FacesLifecycle.beginRequest(FacesLifecycle.java:54) 
    at org.jboss.seam.jsf.SeamPhaseListener.beforeRestoreView(SeamPhaseListener.java:366) 
    at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:137) 
    at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:114) 
    at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:214) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:96) 
    at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:103) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206) 
    at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) 
    at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388) 
    at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Unknown Source) 
2011-01-28 15:38:46 org.jboss.seam.jsf.SeamPhaseListener beforePhase 
SEVERE: swallowing exception 
java.lang.NullPointerException 
    at org.jboss.seam.Component.getInstance(Component.java:1859) 
    at org.jboss.seam.Component.getInstance(Component.java:1852) 
    at org.jboss.seam.Component.getInstance(Component.java:1829) 
    at org.jboss.seam.web.Session.getInstance(Session.java:122) 
    at org.jboss.seam.contexts.FacesLifecycle.beginRequest(FacesLifecycle.java:54) 
    at org.jboss.seam.jsf.SeamPhaseListener.beforeRestoreView(SeamPhaseListener.java:366) 
    at org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:137) 
    at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:114) 
    at com.sun.faces.lifecycle.Phase.handleBeforePhase(Phase.java:214) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:96) 
    at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:103) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206) 
    at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) 
    at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388) 
    at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Unknown Source) 
2011-01-28 15:38:46 com.sun.faces.lifecycle.Phase doPhase 
SEVERE: JSF1054: (Phase ID: RESTORE_VIEW 1, View ID:) Exception thrown during phase execution: javax.faces.event.PhaseEvent[[email protected]] 
2011-01-28 15:38:46 org.jboss.seam.jsf.SeamPhaseListener afterPhase 
SEVERE: uncaught exception 
java.lang.NullPointerException 
    at org.jboss.seam.jsf.SeamPhaseListener.raiseEventsAfterPhase(SeamPhaseListener.java:421) 
    at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:175) 
    at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:175) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:114) 
    at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:103) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206) 
    at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) 
    at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388) 
    at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Unknown Source) 
2011-01-28 15:38:46 org.jboss.seam.jsf.SeamPhaseListener afterPhase 
SEVERE: swallowing exception 
java.lang.NullPointerException 
    at org.jboss.seam.jsf.SeamPhaseListener.raiseEventsAfterPhase(SeamPhaseListener.java:421) 
    at org.jboss.seam.jsf.SeamPhaseListener.afterPhase(SeamPhaseListener.java:175) 
    at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:175) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:114) 
    at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:103) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206) 
    at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) 
    at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388) 
    at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Unknown Source) 
2011-01-28 15:38:46 org.ajax4jsf.webapp.BaseXMLFilter doXmlFilter 
SEVERE: Exception in the filter chain 
javax.servlet.ServletException 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:277) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206) 
    at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) 
    at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388) 
    at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.lang.NullPointerException 
    at org.jboss.seam.jsf.SeamViewHandler.calculateLocale(SeamViewHandler.java:55) 
    at org.ajax4jsf.application.ViewHandlerWrapper.calculateLocale(ViewHandlerWrapper.java:65) 
    at com.sun.faces.application.ViewHandlerImpl.createView(ViewHandlerImpl.java:372) 
    at org.jboss.seam.jsf.SeamViewHandler.createView(SeamViewHandler.java:68) 
    at org.ajax4jsf.application.ViewHandlerWrapper.createView(ViewHandlerWrapper.java:79) 
    at org.ajax4jsf.application.AjaxViewHandler.createView(AjaxViewHandler.java:93) 
    at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:204) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) 
    at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:103) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) 
    ... 18 more

來源

2011-01-28 srd.pl

此問題與Seam有關。我不做Seam，但它看起來在Tomcat 6上表現不佳。有些[Google結果]（http://www.google.com/search?q=java.lang.NullPointerException+at + org.jboss.seam.jsf.SeamViewHandler.calculateLocale）證實了這一點。這至少與我的文章沒有關係，因爲它不涉及Seam。 – BalusC 2011-01-28 15:43:51

這似乎是在尋找一個區域設置 - 你有一個設置在您的配置文件，如果是這樣做的是語言環境中存在的應用程序嗎？

來源

2011-01-28 16:39:00 TrueDub

我得到了同樣的錯誤，發現問題是，實際上，我忘了幾行中web.xml激活Seam的聽衆：

<listener> 
    <listener-class>org.jboss.seam.servlet.SeamListener</listener-class> 
</listener>

這聞起來像一個容易重複錯誤，所以也許這個答案可以成爲一些尋找解決方案的不幸人士的解決方案。（OTOH，因爲任何NullPointerException，它可能有其他許多原因發生，據我所知，沒有一個在堆棧跟蹤中描述得很好）。

來源

2013-03-07 06:20:07 brandizzi

在SeamViewHandler.calculateLocale JSF NullPointerException

回答

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