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尝试坚持JPA实体时出错

2011-08-22 127 views
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当我尝试从类中坚持实体时出现错误。我创建了UserController类，当我尝试执行Register方法时，em.pertist（usr）行出现错误，当我直接在UserRegBean内部运行此代码时它会工作...有人可以帮助我...尝试坚持JPA实体时出错

这里是代码：

UserController.java

public Boolean Register(String _userName,String _passwd) throws NoSuchAlgorithmException, UnsupportedEncodingException 

    { 

     User usr = new User(); 

     usr.setEmail(_userName); 

     MessageDigest digest = MessageDigest.getInstance("SHA-1"); 

     digest.reset(); 

     digest.update(pwdSalt); 

     byte[] input = digest.digest(_passwd.getBytes("UTF-8"));  

     BASE64Encoder encoder = new BASE64Encoder(); 

     usr.setPassword(encoder.encode(input)); 

     em.persist(usr); 



     return true; 

    }

UserRegBean.java

public void register() throws Exception { 

     UserController uControl = new UserController(); 

      Boolean registered = uControl.Register(this.email,this.passwd); 



/*    User usr = new User(); 

      usr.setEmail(this.email); 

      MessageDigest digest = MessageDigest.getInstance("SHA-1"); 

      digest.reset(); 

      digest.update(pwdSalt); 

      byte[] input = digest.digest(this.passwd. getBytes("UTF-8"));  

      BASE64Encoder encoder = new BASE64Encoder(); 

      usr.setPassword(encoder.encode(input)); 

      em.persist(usr);*/ 

     }

的错误：

10:27:01,524 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (http--127.0.0.1-8080-6) java.lang.NullPointerException: javax.faces.el.EvaluationException: java.lang.NullPointerException 

    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:118) [prettyfaces-jsf2-3.3.0.jar:] 

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:734) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:541) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:479) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:407) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:110) [prettyfaces-jsf2-3.3.0.jar:] 

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) [jboss-as-web-7.0.0.Final.jar:7.0.0.Final] 

    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:49) [jboss-as-jpa-7.0.0.Final.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at java.lang.Thread.run(Thread.java:662) [:1.6.0_26] 

Caused by: java.lang.NullPointerException 

    at net.newideas.scart.controllers.UserController.Register(UserController.java:34) [classes:] 

    at net.newideas.scart.model.UserRegBean.register(UserRegBean.java:85) [classes:] 

    at net.newideas.scart.model.UserRegBean$Proxy$_$$_WeldClientProxy.register(UserRegBean$Proxy$_$$_WeldClientProxy.java) [classes:] 

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_26] 

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_26] 

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_26] 

    at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_26] 

    at org.apache.el.parser.AstValue.invoke(AstValue.java:196) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) [weld-core-1.1.2.AS7.jar:2011-07-06 12:26] 

    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) [weld-core-1.1.2.AS7.jar:2011-07-06 12:26] 

    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    ... 32 more 



10:27:01,527 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (http--127.0.0.1-8080-6) #{userRegBean.register}: java.lang.NullPointerException: javax.faces.FacesException: 
#{userRegBean.register}: java.lang.NullPointerException 

    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:118) [prettyfaces-jsf2-3.3.0.jar:] 

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:734) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:541) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:479) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:407) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:110) [prettyfaces-jsf2-3.3.0.jar:] 

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) [jboss-as-web-7.0.0.Final.jar:7.0.0.Final] 

    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:49) [jboss-as-jpa-7.0.0.Final.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at java.lang.Thread.run(Thread.java:662) [:1.6.0_26] 

Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException 

    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    ... 31 more 

Caused by: java.lang.NullPointerException 

    at net.newideas.scart.controllers.UserController.Register(UserController.java:34) [classes:] 

    at net.newideas.scart.model.UserRegBean.register(UserRegBean.java:85) [classes:] 

    at net.newideas.scart.model.UserRegBean$Proxy$_$$_WeldClientProxy.register(UserRegBean$Proxy$_$$_WeldClientProxy.java) [classes:] 

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_26] 

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_26] 

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_26] 

    at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_26] 

    at org.apache.el.parser.AstValue.invoke(AstValue.java:196) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) [jbossweb-7.0.0.CR4.jar:7.0.0.Final] 

    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) [weld-core-1.1.2.AS7.jar:2011-07-06 12:26] 

    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) [weld-core-1.1.2.AS7.jar:2011-07-06 12:26] 

    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.0.4-b09-jbossorg-4.jar:2.0.4-b09-jbossorg-4] 

    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) [jboss-jsf-api_2.0_spec-1.0.0.Final.jar:1.0.0.Final] 

    ... 32 more 



10:27:01,531 ERROR [stderr] (http--127.0.0.1-8080-6) javax.faces.FacesException: #{userRegBean.register}: java.lang.NullPointerException 

10:27:01,531 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:89) 

10:27:01,531 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 

10:27:01,531 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:118) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:734) 

10:27:01,532 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:541) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:479) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:407) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:110) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) 

10:27:01,533 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:49) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) 

10:27:01,534 ERROR [stderr] (http--127.0.0.1-8080-6)  at java.lang.Thread.run(Thread.java:662) 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6) Caused by: javax.faces.FacesException: #{userRegBean.register}: java.lang.NullPointerException 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6)  at javax.faces.component.UICommand.broadcast(UICommand.java:315) 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6)  at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787) 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6)  at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252) 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6)  ... 27 more 

10:27:01,535 ERROR [stderr] (http--127.0.0.1-8080-6) Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  ... 31 more 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6) Caused by: java.lang.NullPointerException 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  at net.newideas.scart.controllers.UserController.Register(UserController.java:34) 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  at net.newideas.scart.model.UserRegBean.register(UserRegBean.java:85) 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  at net.newideas.scart.model.UserRegBean$Proxy$_$$_WeldClientProxy.register(UserRegBean$Proxy$_$$_WeldClientProxy.java) 

10:27:01,536 ERROR [stderr] (http--127.0.0.1-8080-6)  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at java.lang.reflect.Method.invoke(Method.java:597) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.el.parser.AstValue.invoke(AstValue.java:196) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56) 

10:27:01,537 ERROR [stderr] (http--127.0.0.1-8080-6)  at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) 

10:27:01,538 ERROR [stderr] (http--127.0.0.1-8080-6)  at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) 

10:27:01,538 ERROR [stderr] (http--127.0.0.1-8080-6)  ... 32 more

来源

2011-08-22 RLuceac

+0

这只是一个'NullPointerException'。在'UserController.java：34'处添加一个断点，并查看代码尝试解引用的变量是'null'。 –

+0

您在'line 34'的'Register（...）'方法中得到'NullPointerException'。你不能自己调试这条线，或者发布实际的线号？我怀疑'em'引用的'EntityManager'或方法中使用的'pwdSalt'变量为空。 –

+0

第34行是em.persist（usr）。在调试中，我看到em是空的，但在我的类中，我有：'@PersistenceContext（name =“SCarteiro”） Private EntityManager em;'和UserRegBean中的相同工作.... – RLuceac

回答

0

我想@EJB适用于非JEE6（Tomcat或码头）&在JEE6 CDI（JBoss的或是Glassfish），你需要使用@注入

来源

2011-12-04 09:55:10

0

可以查询“NAME =‘SCarteiro’”拼写，看是否相同名称相匹配你的persistence.xml的一个

来源

2011-08-22 15:52:36 gautirao

+0

Here My persistence.xml \t'' – RLuceac

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我需要用别的东西来指示我的类吗？ – RLuceac

+0

你为什么使用这个“UserController uControl = new UserController（）;” 。如果它是一个EJB，在你的托管bean中使用@EJB注释，并且容器应该在你的UserRegBean托管bean中为你注入它 – gautirao

0

PLZ检查UsrController豆被登记这个bean的定义列表。

似乎容器无法访问该bean。

祝你好运！

来源

2011-08-22 18:29:50 venomrld

+0

我该如何检查？ – RLuceac

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