Question

我正在使用Eclipse / jsf来创建我的Web应用程序。我试图解决像This

这样的问题

我包括：

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<jsp:root 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:jsp="http://java.sun.com/JSP/Page"
    xmlns:a4j="http://richfaces.org/a4j"
    xmlns:rich="http://richfaces.org/rich">
    <html xmlns="http://www.w3.org/1999/xhtml">

我的代码：

<h:inputText id="cod" value="#{myBean.nwcode}"
size="25" maxlength="30" required="true" requiredMessage="CODE est obligatoire" >
<f:ajax listener="#{myBean.namedChanged}"  render="@form"/>
                                </h:inputText>

缺少什么？。

如果在这种情况下无法使用Tag，请告诉我如何使用valueChangeListener属性，因为我已经实现了一个方法：

    public void OnproCodeChangeCheckValid(ValueChangeEvent VChEvnt)
{
    if(!((String)VChEvnt.getNewValue()).equals(null)&&!((String)VChEvnt.getNewValue()).trim().isEmpty())
    {
    nwprofvalid=!estprofileexist((String)VChEvnt.getNewValue());
    }
}

但是这个方法并没有被简单地说：

valueChangeListener="#{myBean.OnproCodeChangeCheckValid}"

也许因为它需要一个参数，所以如何通过它？有什么想法？。

非常感谢提前。

例外：

javax.servlet.ServletException: /ajoutProfile.jspx @57,21 <f:ajax> Tag Library supports namespace: http://java.sun.com/jsf/core, but no tag was defined for name: ajax
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:321)
    org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)

com.sun.facelets.tag.TagException: /ajoutProfile.jspx @57,21 <f:ajax> Tag Library supports namespace: http://java.sun.com/jsf/core, but no tag was defined for name: ajax
    com.sun.facelets.compiler.CompilationManager.pushTag(CompilationManager.java:193)
    com.sun.facelets.compiler.SAXCompiler$CompilationHandler.startElement(SAXCompiler.java:194)
    org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
    org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
    org.apache.xerces.impl.dtd.XMLDTDValidator.emptyElement(Unknown Source)
    org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
    org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
    org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    org.apache.xerces.jaxp.SAXParserImpl.parse(Unknown Source)
    javax.xml.parsers.SAXParser.parse(Unknown Source)
    com.sun.facelets.compiler.SAXCompiler.doCompile(SAXCompiler.java:232)
    com.sun.facelets.compiler.Compiler.compile(Compiler.java:105)
    com.sun.facelets.impl.DefaultFaceletFactory.createFacelet(DefaultFaceletFactory.java:218)
    com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:149)
    com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:100)
    com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:517)
    com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:567)
    org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
    org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:117)
    com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:135)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:309)
    org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)

    org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)
    org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
    org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)
    org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)
    com.planetj.servlet.filter.compression.CompressingFilter.doFilter(CompressingFilter.java:271)

Answer 1

<f:ajax>在JSF 2.0中引入。您的问题症状表明您正在使用缺少<f:ajax>标记的JSF 1.x.至少，堆栈跟踪中com.sun.facelets.*类的存在确认您正在使用Facelets 1.x，这反过来证实您正在使用JSF 1.x.也就是说，在JSF 2.x中，Facelets类已移至com.sun.faces.facelets.*，此处有一些类重构（例如FaceletViewHandler不再存在）。

堆栈跟踪还确认您已安装Ajax4JSF。在这种情况下，只需使用<a4j:ajax>代替<f:ajax>即可根据您找到的答案解决问题。

没有为name定义标记：ajax

1 个答案: