primefaces中的FileUploadEvent不起作用

时间：2013-03-14 23:26:44

标签： jsf file-upload primefaces

我是JSF的新手，我目前正在进行测试照片上传应用程序。

我已纳入项目：

  • 公地文件上传-1.2.2.jar
  • 公地-IO-1.4.jar
  • primefaces-3.4.2.jar

这是我的web.xml 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<context-param>
    <param-name>javax.faces.PROJECT_STAGE</param-name>
    <param-value>Development</param-value>
</context-param>

<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/faces/*</url-pattern>
</servlet-mapping>

<session-config>
    <session-timeout>
        30
    </session-timeout>
</session-config>

<welcome-file-list>
    <welcome-file>faces/index.xhtml</welcome-file>
</welcome-file-list>

<filter>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>

    <init-param>
        <param-name>thresholdSize</param-name>
        <param-value>2097152</param-value>
    </init-param>     
</filter>

<filter-mapping>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <servlet-name>Faces Servlet</servlet-name>
</filter-mapping>  

<!-- Map these files with JSF -->
<servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.jsf</url-pattern>
</servlet-mapping>
</web-app>

这是我的index.html

的主体 
<h:body>
    <p:panel header="Create Player">
        <h:form id="photoform" enctype="multipart/form-data">
        <h:panelGrid columns="3">


            <h:outputLabel for="name" value="Name"/>  
            <h:inputText id="name" value="#{playerController.player.name}"/>
            <h:message for="name"/>


            <h:outputLabel for="photo" value="Photo"/> 

            <p:fileUpload  mode="advanced" id="photo" update="msg" auto="true"   fileUploadListener="#{playerController.handlePhotoUpload(event)}"/>

            <p:growl id="msg"/>


       </h:panelGrid>

        <p:commandButton value="Submit" action="#{playerController.submit}" ajax="false"/>
        </h:form>
    </p:panel>

    <br />

</h:body>

基本上我正在尝试将名称和照片的播放器保存到数据库中。调用fileUploadListener时（在我的RequestedScope Managed Bean中）出现问题：

 public void handlePhotoUpload(FileUploadEvent event)throws IOException
{

    System.out.println("Entering Listener");
    byte[] foto=event.getFile().getContents();
    System.out.println("Photo Contents Assigned");

    player.setPictureData(foto);
}

我知道当文件尝试上传时会进入“handlePhotoUpload”方法，因为GlassFish输出显示消息“Entering Listener”。但是，之后我收到以下错误：

Advertencia: /index.xhtml @22,153 fileUploadListener="#     {playerController.handlePhotoUpload(event)}": java.lang.NullPointerException
javax.el.ELException: /index.xhtml @22,153 fileUploadListener="#    {playerController.handlePhotoUpload(event)}": java.lang.NullPointerException
    at     com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:111)
at org.primefaces.component.fileupload.FileUpload.broadcast(FileUpload.java:279)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:759)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:935)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
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:593)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:77)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
at controller.PlayerController.handlePhotoUpload(PlayerController.java:78)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:779)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:528)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:257)
at com.sun.el.parser.AstValue.invoke(AstValue.java:248)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
... 36 more

我真的不知道出了什么问题。我已阅读过每一篇博文，但这些都没有说明我遇到的问题。

0 个答案:

没有答案
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