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我需要使用 ajax.requst 从 javascript 调用 JSF Bean 方法。下面 XHTML 文件中的共享按钮将执行一个 javascript，该 javascript 将运行下面的 ajax 函数。但我收到以下错误。我需要帮助在这条路线中执行 ajax 请求，我相信会有几种选择，但我希望它现在以这种方式工作。

javascript

$('#shareButton').livequery("click", function () {
............................
.................

           jsf.ajax.request('commandLink',null,{execute: 'commandLink',render: 'topic_guid'});
...................
.............})

XHTML

        <f:form id="testForm" prependId="false">
<div id="sharebtn">
                    <a class="button Share" style="" id="shareButton">Share</a>
                </div>
        <h:inputHidden value="#{topicBean.topicVO.body}" id="topic_body"/>
        <h:inputHidden value="#{topicBean.topicVO.videoAudioUrl}" id="topic_vaurl" />
        <h:inputHidden value="#{topicBean.topic_guid}" id="topic_guid" />
        <p:commandLink id="commandLink" action="#{topicController.createTopic}"
                     </f:form>

错误

20:38:13,793 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/emyed-web].[default]] (http--127.0.0.1-8080-6) Servlet.service() for servlet default threw exception: java.lang.NullPointerException
    at com.sun.faces.mgbean.BeanManager$ScopeManager$SessionScopeHandler.handle(BeanManager.java:575) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.mgbean.BeanManager$ScopeManager.pushToScope(BeanManager.java:458) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:410) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203) [jsf-impl-2.1.7-jbossorg-2.jar:]
    at com.zreflect.emyed.filter.EmyEdAccessFilter.hasLoggedIn(EmyEdAccessFilter.java:113) [emyed-ui-1.0.jar:]
    at com.zreflect.emyed.filter.EmyEdAccessFilter.doFilter(EmyEdAccessFilter.java:84) [emyed-ui-1.0.jar:]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]
    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:897) [jbossweb-7.0.13.Final.jar:]
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:626) [jbossweb-7.0.13.Final.jar:]
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2039) [jbossweb-7.0.13.Final.jar:]
    at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_25]
4

2 回答 2

0

如果您想要参数值Topic_body并将topic_vaurl其发送到服务器，请尝试以下代码：

jsf.ajax.request('testForm',null,{execute: 'commandLink',render: 'topic_guid'});

如果它不起作用，请替换'testForm'为':testForm'.

于 2012-08-27T10:14:30.770 回答
0

该错误是由于过滤器类 EmyEdAccessFilter 失败。我从 BalusC 那里得到了正确的建议

Servlet Faces Servlet 的 Servlet.service() 抛出异常：java.lang.NullPointerException JSF

于 2012-08-30T11:25:54.317 回答