我用JSF 2.2.12、Prime Faces 6.0、Omnifaces 2.4和Glassfish 4.1.1开发了一个Java Web应用程序。
如果用户没有会话，并且试图通过与主页不同的页面访问网站，则显示此错误
无法为管理bean ContactController设置属性SessionScopedBean……由:java.lang.IllegalStateException: Cannot create a session after response has committed
我看到了一些关于"响应提交后无法创建会话"的其他问题，我也看到了一些"解决方案"。
目前最"有效"的答案是https://stackoverflow.com/a/9687525/3564882。是的，错误消失了，但缺点是用户被重定向到主页。我不清楚这里发生了什么。
这里有一些代码但是所有的bean都没有做任何特殊的
ContactController
@ManagedBean
@ViewScoped
public class ContactController implements Serializable {
@ManagedProperty(value = "#{sessionScopedBean}")
private SessionScopedBean sessionScopedBean;
public void loadThePage() {
UserInSessionBean userInSessionBean = sessionScopedBean.getUserInSessionBean();
if (userInSessionBean != null) {
...
}
}
SessionScopedBean
@ManagedBean(name = "sessionScopedBean")
@SessionScoped
public class SessionScopedBean implements Serializable{
private UserInSessionBean userInSessionBean;
...
...
public UserInSessionBean getUserInSessionBean() {
return userInSessionBean;
}
public void setUserInSessionBean(UserInSessionBean userInSessionBean) {
this.userInSessionBean = userInSessionBean;
}
}
所以基本上当我的用户没有会话并试图访问不同于主页的页面时，问题就发生了。在所有其他情况下，我没有任何问题。
这里是完整的stacktrace
Warning: Unable to set property sessionScopedBean for managed bean contactController
com.sun.faces.mgbean.ManagedBeanCreationException: Unable to set property sessionScopedBean for managed bean contactController
at com.sun.faces.mgbean.ManagedBeanBuilder$BakedBeanProperty.set(ManagedBeanBuilder.java:615)
at com.sun.faces.mgbean.ManagedBeanBuilder.buildBean(ManagedBeanBuilder.java:133)
at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:102)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:257)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:117)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:116)
at com.sun.el.parser.AstValue.getBase(AstValue.java:151)
at com.sun.el.parser.AstValue.getTarget(AstValue.java:170)
at com.sun.el.parser.AstValue.invoke(AstValue.java:272)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UIViewAction.broadcast(UIViewAction.java:562)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:344)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:305)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at com.myApp.jsf.filter.SecurityWebFilter.doFilter(SecurityWebFilter.java:42)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at com.classicvirus.jsf.filter.LoggedUserWebFilter.doFilter(LoggedUserWebFilter.java:55)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:316)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:416)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:283)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:591)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:571)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:3241)
at org.apache.catalina.connector.Request.getSession(Request.java:2884)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:908)
at com.sun.faces.context.ExternalContextImpl.getSession(ExternalContextImpl.java:167)
at javax.faces.context.ExternalContextWrapper.getSession(ExternalContextWrapper.java:438)
at com.sun.faces.mgbean.BeanManager$ScopeManager$SessionScopeHandler.handle(BeanManager.java:578)
at com.sun.faces.mgbean.BeanManager$ScopeManager.pushToScope(BeanManager.java:458)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:410)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:257)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:117)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:116)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:226)
at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
at com.sun.faces.mgbean.BeanBuilder$Expression.evaluate(BeanBuilder.java:561)
at com.sun.faces.mgbean.ManagedBeanBuilder$BakedBeanProperty.set(ManagedBeanBuilder.java:606)
... 67 more
你能试着帮助我吗?
经过一番调查，我意识到这是我的错误和(可能)JSF错误的混合。
关于以下
At the moment the most "effective" is this answer http://stackoverflow.com/a/9687525/3564882. Yes, the error disappears, but the drawback is that the user is redirected to the home page. For me is not clear what's happening here.
是我的错，因为在过去的@PostConstruct方法中，我将用户重定向到主页。在我的理想情况下，新代码会创建一个bug。
但对我来说，不清楚为什么我们需要创建会话，如果需要的话。有时候JSF需要它。有时不是。因此，我认为这是JSF内部的一个小bug。
概括一下。解决方案是将这行
FacesContext.getCurrentInstance().getExternalContext().getSession(true);
在所有的控制器(我有一个超类，帮助我)。
在此之后，记得创建"sessionScopedBean"，认为问题中解释的情况存在。这样你就可以避免浪费一些时间。