在 jsf 中使用 menuitem 标签中的标签 onerror 报告错误

Question

我是 jsf 的新手，想在下面的 xhtml 代码中使用标签“onerror”在primefaces（使用jsf 2）中引发一个带有错误的对话框

<h:form>
<p:growl id="errorgrowl"  autoUpdate="true" life="5000" severity="error,fatal"/>
..
..
    <p:submenu label="${messages.mLinkView}">
        <p:menuitem value="${messages.mShowOnMap}" target="_blank" outcome="#{linkViewController.showLinkView(nobListController.csvParser,nobListController.allNobMan)}" update="errorgrowl"/>
        <p:menuitem value="${messages.mShowPhyLinksOnMap}" target="_blank" outcome="#{linkViewController.showPhyLinkView(nobListController.csvParserPhyLinks,nobListController.allNobMan)}" update="errorgrowl" />
    </p:submenu>

java: 捕获（异常 e） { log.error ("prepareNElistPhyLinks() 计算 MPLS-Xc 链接失败" + ((e instanceof GeneralException) ? ((GeneralException)e).reason : e.getMessage ())); e.printStackTrace(); FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, e.getMessage(), e.getMessage()); FacesContext.getCurrentInstance().addMessage(null, facesMsg); FacesContext.getCurrentInstance().validationFailed();
}

非常感谢

Answer 1

只需通过p:growl举报即可

<h:form> 
   <p:growl id="errorgrowl"  autoUpdate="true" life="5000" severity="error,fatal"/>
 ...
<h:form> 

在 bean 中：

try {
    ...
}catch(Exception e) {
  FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, e.getMessage(), e.getMessage());
    FacesContext.getCurrentInstance().addMessage(null, facesMsg);
    // FacesContext.getCurrentInstance().validationFailed(); may need this also
}