JSF ViewScope bean、viewParam、ajax 请求用 NULL 更新 MB 属性
JSF ViewScope bean, viewParam, ajax request update the MB attribute with NULL
我有一个应用程序在 payara 4.1.9.2 上使用 JSF 2.2
<context-param>
<param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
<param-value>true</param-value>
</context-param>
这里一切都按预期工作。
现在我正在尝试将其更新到 Payara 5.1.9.3，即 运行 Mojarra 2.3.9.payara-p3。
我现在面临的问题是，如果 ViewScope bean 在创建 bean 时使用 f:viewParam 设置参数来触发 ajax 请求 viewParams 丢失（正常） 并且模型更新为 NULL 值。
所以最初 viewParams 工作正常，值取自 GET 并设置模型 accordingly.When 第一个 ajax 请求在 UPDATE_MODEL_VALUES PHASE bean 属性中触发value 设置为旧值（可以），但在第二个 ajax 请求中，也在 PHASE 4 中，属性值更新为 NULL。
我知道有很多关于这个主题的帖子（f:viewParams 在 ajax 请求中丢失了），但我不清楚的是：
为什么如果我禁用 javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL 指令一切正常，如果我不再启用它？
PS。使用 Payara 4.1.2.174 和 Mojarra 2.2.14 正在运行
更新：
这里我们有 counter.xhtml
的视图
<ui:composition template="../layouts/user.xhtml"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:sec="http://www.springframework.org/security/tags">
<f:metadata>
<f:viewParam name="id" value="#{counterMB.id}"/>
</f:metadata>
<ui:param name="currentMB" value="#{counterMB}"/>
<ui:define name="title">Counter </ui:define>
<h:form id="myForm">
Id is <h:outputText value="#{counterMB.id}" id="outputTxt"/>
<p:commandLink
action="#{counterMB.incrementCounter()}"
value="Increment"
update="outputTxt"
/>
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
</h:form>
和豆子：
@Named
@Scope("view")
public class CounterMB extends GenericMB implements Serializable{
private static final long serialVersionUID = 1L;
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
System.out.println("Setting the id with:"+id);
this.id = id;
}
public void incrementCounter() {
id = id +1;
// do something with id
System.out.println("Id is="+Integer.toString(id));
}
}
和一些日志：
http://localhost:8080/myapp/counter.xhtml?id=4
(LifecycleListener.java:22) - START PHASE RESTORE_VIEW 1
(LifecycleListener.java:26) - END PHASE RESTORE_VIEW 1
(LifecycleListener.java:22) - START PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:26) - END PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:22) - START PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:26) - END PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:22) - START PHASE UPDATE_MODEL_VALUES 4
2019-10-24T13:43:52.573+0000|Info: Setting the id with:4
(LifecycleListener.java:26) - END PHASE UPDATE_MODEL_VALUES 4
(LifecycleListener.java:22) - START PHASE INVOKE_APPLICATION 5
(LifecycleListener.java:26) - END PHASE INVOKE_APPLICATION 5
(LifecycleListener.java:22) - START PHASE RENDER_RESPONSE 6
(LifecycleListener.java:26) - END PHASE RENDER_RESPONSE 6
//click on increment 1st time
(LifecycleListener.java:22) - START PHASE RESTORE_VIEW 1
(LifecycleListener.java:26) - END PHASE RESTORE_VIEW 1
(LifecycleListener.java:22) - START PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:26) - END PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:22) - START PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:26) - END PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:22) - START PHASE UPDATE_MODEL_VALUES 4
2019-10-24T13:44:07.013+0000|Info: Setting the id with:4
(LifecycleListener.java:26) - END PHASE UPDATE_MODEL_VALUES 4
(LifecycleListener.java:22) - START PHASE INVOKE_APPLICATION 5
2019-10-24T13:44:07.014+0000|Info: Id is=5
(LifecycleListener.java:26) - END PHASE INVOKE_APPLICATION 5
(LifecycleListener.java:22) - START PHASE RENDER_RESPONSE 6
(LifecycleListener.java:26) - END PHASE RENDER_RESPONSE 6
// click on icrement the second time
(LifecycleListener.java:22) - START PHASE RESTORE_VIEW 1
(LifecycleListener.java:26) - END PHASE RESTORE_VIEW 1
(LifecycleListener.java:22) - START PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:26) - END PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:22) - START PHASE PROCESS_VALIDATIONS 3
LifecycleListener.java:26) - END PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:22) - START PHASE UPDATE_MODEL_VALUES 4
2019-10-24T13:44:12.548+0000|Info: Setting the id with:null
(LifecycleListener.java:26) - END PHASE UPDATE_MODEL_VALUES 4
(LifecycleListener.java:22) - START PHASE INVOKE_APPLICATION 5
2019-10-24T13:44:12.549+0000|Warning: #{counterMB.incrementCounter()}: java.lang.NullPointerException
javax.faces.FacesException: #{counterMB.incrementCounter()}: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.getNavigationOutcome(ActionListenerImpl.java:96)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:71)
at org.springframework.faces.webflow.FlowActionListener.processAction(FlowActionListener.java:71)
at org.springframework.faces.model.SelectionTrackingActionListener.processAction(SelectionTrackingActionListener.java:64)
at org.primefaces.application.DialogActionListener.processAction(DialogActionListener.java:54)
at javax.faces.component.UICommand.broadcast(UICommand.java:222)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:847)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1395)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:58)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:76)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:177)
at javax.faces.webapp.FacesServlet.executeLifecyle(FacesServlet.java:707)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:451)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1628)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:339)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:305)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:124)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:155)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:755)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:575)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:159)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:371)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:238)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:520)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:217)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:182)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:156)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:218)
at org.glassfish.grizzly.filterchain.ExecutorResolver.execute(ExecutorResolver.java:95)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:260)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:177)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:109)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:88)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:53)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:524)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:89)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:94)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access0(WorkerThreadIOStrategy.java:33)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:114)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:569)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:549)
at java.lang.Thread.run(Thread.java:748)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:76)
at com.sun.faces.application.ActionListenerImpl.getNavigationOutcome(ActionListenerImpl.java:82)
... 82 more
Caused by: java.lang.NullPointerException
at com.myapp.jsf.user.CounterMB.incrementCounter(CounterMB.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at javax.el.ELUtil.invokeMethod(ELUtil.java:263)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:494)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:215)
at com.sun.el.parser.AstValue.invoke(AstValue.java:285)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:65)
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:66)
... 83 more
2019-10-24T13:44:12.551+0000|Info: INFO [http-thread-pool::http-listener-1(2)] (LifecycleListener.java:26) - END PHASE INVOKE_APPLICATION 5
一种解决方法是在 f:viewParam 上渲染 =“#{not facesContext.postback}”，但我认为这不是正确的行为。
更新：
在 Kukeltje sugestion，我尝试使用普通的 JSF 应用程序，使用 @ViewScoped 并且它以 expected.With 的形式工作，我将继续添加 primefaces 和 spring 以及......我在当前应用程序尝试模拟当前情况。
更新：
它使用纯 jsf 的原因是 h:commandLink 没有发出 ajax 请求。我能够用这些文件重现它：
`
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<f:facet name="first">
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</f:facet>
<title> Simulator - Counter rest</title>
</h:head>
<h:body>
<f:metadata>
<f:viewParam name="id" value="#{counterMB.id}"/>
</f:metadata>
<h:form id="myForm">
Id is <h:outputText value="#{counterMB.id}" id="outputTxt"/>
<h:commandButton value="Increment"update="outputTxt">
<f:ajax listener="#{counterMB.incrementCounter()}" execute="myForm" render="outputTxt"/>
</h:commandButton>
</h:form>
</h:body>
</html>
`
和这个豆子
import java.io.Serializable;
import javax.faces.view.ViewScoped;
import javax.inject.Named;
@Named
@ViewScoped
public class CounterMB implements Serializable{
private static final long serialVersionUID = 1L;
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
System.out.println("Setting the id with:"+id);
this.id = id;
}
public void incrementCounter() {
id = id +1;
System.out.println("Id is="+Integer.toString(id));
}
}
我搜索了一下，发现了 3 个东西（不确定这是不是答案，甚至根本不确定答案，但输入评论太多了）
- 是 'duplicate'
（未回答但有一些讨论）
- 是一个link似乎与includeViewParams=true converts null model value to empty string in query string
相关
是来自 http://showcase.omnifaces.org/components/viewParam 的关于 JSF 2.3 中与 viewParam 和 null 相关的更改的一些信息。
In JSF 2.3, this has been fixed and has only effect when javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL context param is set to true.
这种组合让我认为你 'were lucky' 它在 2.2 中有效（确定回传中的 id 不是“0”？）老实说，2.3 行为 'feels' 正确。
作为解决方案，您还可以在 setter
中添加 'null' 检查
void setId(Integer id) {
if (id != null) {
this.id = id;
}
}
或者您可以尝试 o:viewParam，看看它是否有所作为。
我有一个应用程序在 payara 4.1.9.2 上使用 JSF 2.2
<context-param>
<param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
<param-value>true</param-value>
</context-param>
这里一切都按预期工作。
现在我正在尝试将其更新到 Payara 5.1.9.3，即 运行 Mojarra 2.3.9.payara-p3。
我现在面临的问题是，如果 ViewScope bean 在创建 bean 时使用 f:viewParam 设置参数来触发 ajax 请求 viewParams 丢失（正常） 并且模型更新为 NULL 值。
所以最初 viewParams 工作正常，值取自 GET 并设置模型 accordingly.When 第一个 ajax 请求在 UPDATE_MODEL_VALUES PHASE bean 属性中触发value 设置为旧值（可以），但在第二个 ajax 请求中，也在 PHASE 4 中，属性值更新为 NULL。
我知道有很多关于这个主题的帖子（f:viewParams 在 ajax 请求中丢失了），但我不清楚的是：
为什么如果我禁用 javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL 指令一切正常，如果我不再启用它？
PS。使用 Payara 4.1.2.174 和 Mojarra 2.2.14 正在运行
更新：
这里我们有 counter.xhtml
的视图<ui:composition template="../layouts/user.xhtml"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:sec="http://www.springframework.org/security/tags">
<f:metadata>
<f:viewParam name="id" value="#{counterMB.id}"/>
</f:metadata>
<ui:param name="currentMB" value="#{counterMB}"/>
<ui:define name="title">Counter </ui:define>
<h:form id="myForm">
Id is <h:outputText value="#{counterMB.id}" id="outputTxt"/>
<p:commandLink
action="#{counterMB.incrementCounter()}"
value="Increment"
update="outputTxt"
/>
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
</h:form>
和豆子：
@Named
@Scope("view")
public class CounterMB extends GenericMB implements Serializable{
private static final long serialVersionUID = 1L;
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
System.out.println("Setting the id with:"+id);
this.id = id;
}
public void incrementCounter() {
id = id +1;
// do something with id
System.out.println("Id is="+Integer.toString(id));
}
}
和一些日志：
http://localhost:8080/myapp/counter.xhtml?id=4
(LifecycleListener.java:22) - START PHASE RESTORE_VIEW 1
(LifecycleListener.java:26) - END PHASE RESTORE_VIEW 1
(LifecycleListener.java:22) - START PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:26) - END PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:22) - START PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:26) - END PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:22) - START PHASE UPDATE_MODEL_VALUES 4
2019-10-24T13:43:52.573+0000|Info: Setting the id with:4
(LifecycleListener.java:26) - END PHASE UPDATE_MODEL_VALUES 4
(LifecycleListener.java:22) - START PHASE INVOKE_APPLICATION 5
(LifecycleListener.java:26) - END PHASE INVOKE_APPLICATION 5
(LifecycleListener.java:22) - START PHASE RENDER_RESPONSE 6
(LifecycleListener.java:26) - END PHASE RENDER_RESPONSE 6
//click on increment 1st time
(LifecycleListener.java:22) - START PHASE RESTORE_VIEW 1
(LifecycleListener.java:26) - END PHASE RESTORE_VIEW 1
(LifecycleListener.java:22) - START PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:26) - END PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:22) - START PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:26) - END PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:22) - START PHASE UPDATE_MODEL_VALUES 4
2019-10-24T13:44:07.013+0000|Info: Setting the id with:4
(LifecycleListener.java:26) - END PHASE UPDATE_MODEL_VALUES 4
(LifecycleListener.java:22) - START PHASE INVOKE_APPLICATION 5
2019-10-24T13:44:07.014+0000|Info: Id is=5
(LifecycleListener.java:26) - END PHASE INVOKE_APPLICATION 5
(LifecycleListener.java:22) - START PHASE RENDER_RESPONSE 6
(LifecycleListener.java:26) - END PHASE RENDER_RESPONSE 6
// click on icrement the second time
(LifecycleListener.java:22) - START PHASE RESTORE_VIEW 1
(LifecycleListener.java:26) - END PHASE RESTORE_VIEW 1
(LifecycleListener.java:22) - START PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:26) - END PHASE APPLY_REQUEST_VALUES 2
(LifecycleListener.java:22) - START PHASE PROCESS_VALIDATIONS 3
LifecycleListener.java:26) - END PHASE PROCESS_VALIDATIONS 3
(LifecycleListener.java:22) - START PHASE UPDATE_MODEL_VALUES 4
2019-10-24T13:44:12.548+0000|Info: Setting the id with:null
(LifecycleListener.java:26) - END PHASE UPDATE_MODEL_VALUES 4
(LifecycleListener.java:22) - START PHASE INVOKE_APPLICATION 5
2019-10-24T13:44:12.549+0000|Warning: #{counterMB.incrementCounter()}: java.lang.NullPointerException
javax.faces.FacesException: #{counterMB.incrementCounter()}: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.getNavigationOutcome(ActionListenerImpl.java:96)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:71)
at org.springframework.faces.webflow.FlowActionListener.processAction(FlowActionListener.java:71)
at org.springframework.faces.model.SelectionTrackingActionListener.processAction(SelectionTrackingActionListener.java:64)
at org.primefaces.application.DialogActionListener.processAction(DialogActionListener.java:54)
at javax.faces.component.UICommand.broadcast(UICommand.java:222)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:847)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1395)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:58)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:76)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:177)
at javax.faces.webapp.FacesServlet.executeLifecyle(FacesServlet.java:707)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:451)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1628)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:339)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:305)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:124)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:155)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:755)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:575)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:159)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:371)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:238)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:520)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:217)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:182)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:156)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:218)
at org.glassfish.grizzly.filterchain.ExecutorResolver.execute(ExecutorResolver.java:95)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:260)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:177)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:109)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:88)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:53)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:524)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:89)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:94)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access0(WorkerThreadIOStrategy.java:33)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:114)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:569)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:549)
at java.lang.Thread.run(Thread.java:748)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:76)
at com.sun.faces.application.ActionListenerImpl.getNavigationOutcome(ActionListenerImpl.java:82)
... 82 more
Caused by: java.lang.NullPointerException
at com.myapp.jsf.user.CounterMB.incrementCounter(CounterMB.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at javax.el.ELUtil.invokeMethod(ELUtil.java:263)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:494)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:215)
at com.sun.el.parser.AstValue.invoke(AstValue.java:285)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:65)
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:66)
... 83 more
2019-10-24T13:44:12.551+0000|Info: INFO [http-thread-pool::http-listener-1(2)] (LifecycleListener.java:26) - END PHASE INVOKE_APPLICATION 5
一种解决方法是在 f:viewParam 上渲染 =“#{not facesContext.postback}”，但我认为这不是正确的行为。
更新：
在 Kukeltje sugestion，我尝试使用普通的 JSF 应用程序，使用 @ViewScoped 并且它以 expected.With 的形式工作，我将继续添加 primefaces 和 spring 以及......我在当前应用程序尝试模拟当前情况。
更新：
它使用纯 jsf 的原因是 h:commandLink 没有发出 ajax 请求。我能够用这些文件重现它：
`
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<f:facet name="first">
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</f:facet>
<title> Simulator - Counter rest</title>
</h:head>
<h:body>
<f:metadata>
<f:viewParam name="id" value="#{counterMB.id}"/>
</f:metadata>
<h:form id="myForm">
Id is <h:outputText value="#{counterMB.id}" id="outputTxt"/>
<h:commandButton value="Increment"update="outputTxt">
<f:ajax listener="#{counterMB.incrementCounter()}" execute="myForm" render="outputTxt"/>
</h:commandButton>
</h:form>
</h:body>
</html>
`
和这个豆子
import java.io.Serializable;
import javax.faces.view.ViewScoped;
import javax.inject.Named;
@Named
@ViewScoped
public class CounterMB implements Serializable{
private static final long serialVersionUID = 1L;
private Integer id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
System.out.println("Setting the id with:"+id);
this.id = id;
}
public void incrementCounter() {
id = id +1;
System.out.println("Id is="+Integer.toString(id));
}
}
我搜索了一下，发现了 3 个东西（不确定这是不是答案，甚至根本不确定答案，但输入评论太多了）
- 是 'duplicate'
- 是一个link似乎与includeViewParams=true converts null model value to empty string in query string 相关
是来自 http://showcase.omnifaces.org/components/viewParam 的关于 JSF 2.3 中与 viewParam 和 null 相关的更改的一些信息。
In JSF 2.3, this has been fixed and has only effect when javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL context param is set to true.
这种组合让我认为你 'were lucky' 它在 2.2 中有效（确定回传中的 id 不是“0”？）老实说，2.3 行为 'feels' 正确。
作为解决方案，您还可以在 setter
中添加 'null' 检查void setId(Integer id) {
if (id != null) {
this.id = id;
}
}
或者您可以尝试 o:viewParam，看看它是否有所作为。