Question

我在尝试使用JSF的简单应用程序时遇到错误。

javax.el.MethodNotFoundException: Method not found: com.jsf.training.beans.TravelBean@4b6b8628.travelInfo()
at org.apache.el.util.ReflectionUtil.getMethod(ReflectionUtil.java:245)
at org.apache.el.parser.AstValue.invoke(AstValue.java:271)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:274)
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:149)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:818)
at javax.faces.component.UICommand.broadcast(UICommand.java:300)
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:646)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:409)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1044)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

我的托管bean是：

@ManagedBean (name="travelBean")
@SessionScoped
public class TravelBean {

private int index = 0;
private String source;
private String destination;
private Date date;
java.sql.Date sqlDate;
private boolean visible = false;

public boolean isVisible() {
    return visible;
}
public void setVisible(boolean visible) {
    this.visible = visible;
}
public TravelBean() {

}
public String getSource() {
    return source;
}
public void setSource(String source) {
    this.source = source;
}
public String getDestination() {
    return destination;
}
public void setDestination(String destination) {
    this.destination = destination;
}
public Date getDate() {
    return date;
}
public void setDate(Date date) {
    this.date = date;
}

public int getIndex() {
    return index;
}

public void setIndex(int index) {
    this.index = index;
}

public void getDateInSql() {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    sdf.format(date);
    sqlDate = new java.sql.Date(date.getTime());
}
public void getTravelInfo() throws SQLException {
    setVisible(true);
    /*SearchServiceImpl search = new SearchServiceImpl();
    search.searchTrainsService(travelBean);*/
    System.out.println("********** in travel Bean :" +source +destination +date);
    TrainBean tb = new TrainBean();
    tb.getTrainsList(source,destination,sqlDate);
}

和我的xhtml：

<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head>
<script name="jquery/jquery.js" library="primefaces"></script>
<h:outputStylesheet library="css" name="resources/css/table-style.css"  />
</h:head>
<h:body>
<h:form>
<p:growl id="message"></p:growl>
<p:tabView activeIndex="#{travelBean.index}" dynamic="true" effect="fade" effectDuration="fast">
     <p:tab title="Trains">

        <h:form>
            <h:outputText value="Source"/>:<h:inputText id="source" value="#{travelBean.source}"></h:inputText>
            <h:outputText value="Destination"/>:<h:inputText id="destination" value="#{travelBean.destination}"></h:inputText>
            <h:outputText value="Date"/>:<p:calendar id="date" value="#{travelBean.date}"></p:calendar>
            <h:commandButton value="Search Trains" update="table-wrapper" action="#{travelBean.travelInfo}" actionListener="#{travelBean.travelInfo}" > 
                <!-- <f:ajax execute="@this source destination date" render="output" /> -->
                 <f:attribute name="source" value="#{travelBean.source}"/>
                 <f:attribute name="destination" value="#{travelBean.destination}"/>
                 <f:attribute name="date" value="#{travelBean.date}"/>
            </h:commandButton>
           <h2><h:outputText id="output" value="#{travelBean.source} #{travelBean.destination} #{travelBean.date}"/></h2> 
        </h:form>

    </p:tab> 
    <p:tab title="Flights">
        <h1>Search flights by routes</h1>
         <h:form>
            <h:outputText value="Source"/>:<h:inputText id="source" value="#{travelBean.source}"></h:inputText>
            <h:outputText value="Destination"/>:<h:inputText id="destination" value="#{travelBean.destination}"></h:inputText>
            <h:outputText value="Date"/>:<h:inputText id="date" value="#{travelBean.date}"></h:inputText>
            <h:commandButton value="Search Flights" >
                <f:ajax execute="@form" render="output" />
            </h:commandButton>

            <h2><h:outputText id="output" value="#{travelBean.source}"/>        </h2>
         </h:form> 

    </p:tab>
</p:tabView>


</h:form>

</h:body>

</html>

我已经查看了其他问题，并尝试了答案，但没有任何效果。任何帮助都非常感谢。提前谢谢！

Answer 1

action="#{travelBean.travelInfo}"是一种操作方法。在搜索适当的方法时，只有value方法将travelInfo从EL表达式转换为getTravelInfo（）。在操作方法中，预计travelInfo（）方法应该存在于托管bean中，但它不是。

Answer 2

以防万一，如果您没有导入正确的库，可能会发生相同类型的问题。有时您的IDE可以自动导入：“ import java.awt.event.ActionEvent;”而不是“ import javax.faces.event.ActionEvent;”从而导致“相同”问题。将无法找到该方法。

javax.el.MethodNotFoundException：找不到方法：JSF

2 个答案: