javax.el.PropertyNotFoundException 与 CompositeComponent？

【问题标题】：javax.el.PropertyNotFoundException with CompositeComponent?javax.el.PropertyNotFoundException 与 CompositeComponent？
【发布时间】：2017-06-11 22:30:37
【问题描述】：

我目前正在尝试构建一个复合组件，这就是我如何使用我的组件：

将其包含在xmlns:albert="http://java.sun.com/jsf/composite/albert"中

这是使用示例

<albert:infoButton
    infoId="infoSingleRecord"
    params="transDateFrom transDateTo"
    mappingMethod="#{tBrowseBean_ConfirmedRPB.mapSendInfoSingleRecord}" />

这是放在 resources/albert/infoButton.xhtml 中的组件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"  
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:p="http://primefaces.prime.com.tr/ui"
    xmlns:fn="http://java.sun.com/jsp/jstl/functions"
    xmlns:composite="http://java.sun.com/jsf/composite">

    <composite:interface>
        <composite:attribute name="infoId" required="true" />
        <composite:attribute name="params" />
        <composite:attribute name="mappingMethod" method-signature="java.lang.String action()" />
    </composite:interface>

    <composite:implementation>
        <p:commandButton 
            process="@this #{cc.attrs.params}"
            actionListener="#{cc.attrs.mappingMethod}"
            update="#{cc.attrs.infoId}Panel"
            oncomplete="#{cc.attrs.infoId}Dialog.show()" 
            image="ui-icon ui-icon-search" />
    </composite:implementation>
</html>

但是运行它，当单击 infoButton 时，此异常跟踪显示在我的 catalina.out 日志文件中：

Apr 25, 2011 10:08:43 AM javax.faces.event.MethodExpressionActionListener processAction
SEVERE: Received 'javax.el.PropertyNotFoundException' when invoking action listener '#{cc.attrs.mappingMethod}' for component 'j_idt71'
Apr 25, 2011 10:08:43 AM javax.faces.event.MethodExpressionActionListener processAction
SEVERE: javax.el.PropertyNotFoundException: /TBrowse_tabConfirmedRPB.xhtml @33,77 mappingMethod="#{tBrowseBean_ConfirmedRPB.mapSendInfoSingleRecord}": Property 'mapSendInfoSingleRecord' not found on type mywebapp.paymentplan.TBrowseBean_ConfirmedRPB
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:111)
    at com.sun.faces.facelets.el.ContextualCompositeMethodExpression.invoke(ContextualCompositeMethodExpression.java:184)
    at com.sun.faces.facelets.tag.TagAttributeImpl$AttributeLookupMethodExpression.invoke(TagAttributeImpl.java:450)
    at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:148)
    at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
    at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:777)
    at javax.faces.component.UICommand.broadcast(UICommand.java:300)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:383)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

ERROR BusinessExceptionHandler - BusinessExceptioHandler handles an unhandled exception: 
javax.faces.event.AbortProcessingException: /TBrowse_tabConfirmedRPB.xhtml @33,77 mappingMethod="#{tBrowseBean_ConfirmedRPB.mapSendInfoSingleRecord}": Property 'mapSendInfoSingleRecord' not found on type mywebapp.paymentplan.TBrowseBean_ConfirmedRPB
    at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:182)
    at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
    at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:777)
    at javax.faces.component.UICommand.broadcast(UICommand.java:300)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252)
    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:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:383)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Caused by: javax.el.PropertyNotFoundException: /TBrowse_tabConfirmedRPB.xhtml @33,77 mappingMethod="#{tBrowseBean_ConfirmedRPB.mapSendInfoSingleRecord}": Property 'mapSendInfoSingleRecord' not found on type mywebapp.paymentplan.TBrowseBean_ConfirmedRPB
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:111)
    at com.sun.faces.facelets.el.ContextualCompositeMethodExpression.invoke(ContextualCompositeMethodExpression.java:184)
    at com.sun.faces.facelets.tag.TagAttributeImpl$AttributeLookupMethodExpression.invoke(TagAttributeImpl.java:450)
    at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:148)
    ... 24 more

我想知道为什么会这样，因为在 mywebapp.paymentplan.TBrowseBean_ConfirmedRPB，我已经提供了这个：

public String mapSendInfoSingleRecord(ActionEvent event) {                                                                                                                             
    System.out.println("mapSendInfoSingleRecord");                                                                                                                                 
    return null;                                                                                                                                                                   
}

然后，我尝试放置虚拟 mapSendInfoSingleRecord 字段，看看会发生什么：

private String mapSendInfoSingleRecord;
public String getMapSendInfoSingleRecord() {
    return mapSendInfoSingleRecord;
}

public void setMapSendInfoSingleRecord(String mapSendInfoSingleRecord) {
    this.mapSendInfoSingleRecord = mapSendInfoSingleRecord;
}

但是现在点击按钮会产生这个异常：

Apr 25, 2011 10:32:46 AM javax.faces.event.MethodExpressionActionListener processAction
SEVERE: Received 'javax.el.MethodNotFoundException' when invoking action listener '#{cc.attrs.mappingMethod}' for component 'j_idt71'
Apr 25, 2011 10:32:46 AM javax.faces.event.MethodExpressionActionListener processAction
SEVERE: javax.el.MethodNotFoundException: Method not found: com.sun.faces.el.CompositeComponentAttributesELResolver$ExpressionEvalMap@12f3802.mappingMethod()
        at org.apache.el.util.ReflectionUtil.getMethod(ReflectionUtil.java:225)
        at org.apache.el.parser.AstValue.invoke(AstValue.java:253)
        at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)
        at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:153)
        at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
        at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:777)
        at javax.faces.component.UICommand.broadcast(UICommand.java:300)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252)
        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:118)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:383)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

ERROR BusinessExceptionHandler - BusinessExceptioHandler handles an unhandled exception: 
javax.faces.event.AbortProcessingException: Method not found: com.sun.faces.el.CompositeComponentAttributesELResolver$ExpressionEvalMap@12f3802.mappingMethod()
        at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:182)
        at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
        at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:777)
        at javax.faces.component.UICommand.broadcast(UICommand.java:300)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:787)
        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1252)
        at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:383)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: javax.el.MethodNotFoundException: Method not found: com.sun.faces.el.CompositeComponentAttributesELResolver$ExpressionEvalMap@12f3802.mappingMethod()
        at org.apache.el.util.ReflectionUtil.getMethod(ReflectionUtil.java:225)
        at org.apache.el.parser.AstValue.invoke(AstValue.java:253)
        at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)
        at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:153)
        ... 24 more

我已经针对 mojarra 版本 2.0.4-b09 和 2.1.1-b04 进行了测试，结果相同。

我想知道我在这里做错了什么？

【问题讨论】：

  • 不应该将xmlns:sofco 混淆为xmlns:albert？ :)
  • @BalusC：哈哈，读心术。已编辑:-)

标签： jsf jsf-2 composite-component propertynotfoundexception


【解决方案1】：

有两个问题：

首先，您定义的复合method-signature 

<composite:attribute name="mappingMethod" method-signature="java.lang.String action()" />

与真正的方法签名不匹配

public String mapSendInfoSingleRecord(ActionEvent event)

其次，actionListener 方法应该返回 void 而不是 String。

我假设您只想要一个 action 方法，然后您应该更改真正的方法签名以摆脱 ActionEvent 参数：

public String mapSendInfoSingleRecord()

关于actionListener 与action，您可能会发现这个问题/答案很有用：Differences between action and actionListener。

【讨论】：

  • 哇好酷！修改 method-signature="java.lang.Void action(javax.faces.event.ActionEvent)" 以匹配 void mapSendInfoSingleRecord(ActionEvent e )，现在一切顺利。我选择了 actionListener 因为我打算只在方法上做 UI 的东西，没有任何业务逻辑调用。为什么我返回 String 而它是一个 actionListener 方法是因为我在处理异常时测试了各种方法，然后在定义 void 时不确定，尝试通过使用 String 来遵循书中的基本示例 :-) 谢谢大师!
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