<f：view locale =“”>抛出NullPointerException

时间：2015-07-23 16:08:46

标签： jsf

我正在使用JSF开发一个Web应用程序，我需要使用其他语言提供Web。我没有开发应用程序，我必须继续开发。在某些视图中使用以下内容：

<f:view locale="#{nuevoProyectoBacking.locale}"/>
<f:loadBundle basename="com.company.resources.resdisenyo" var="rDisenyo"/>

所以我创建了一个新的JSF页面，并做了同样的事情：

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets">

    <ui:composition template="/WEB-INF/templates/template.xhtml">
        <f:event type="preRenderView"
                 listener="#{nuevoProyectoBacking.forwardIfIsNotAdmin}" />

        <f:view locale="#{nuevoProyectoBacking.locale}"/>
        <f:loadBundle basename="com.appglass.resources.resdisenyo" var="rDisenyo"/>

        <ui:define name="top">
            <ui:decorate template="/WEB-INF/templates/menuAdministrador.xhtml"></ui:decorate>
        </ui:define>
         etc

只有在我删除f时才有效：view locale =“＃{nuevoProyectoBacking.locale}”

nuevoProyectoBacking.java 

@ManagedBean
@ViewScoped
public class NuevoProyectoBacking implements Serializable{
definitions

/** Creates a new instance of NuevoProyectoBacking */
    public NuevoProyectoBacking()
    {
        many assignments
        locale = LocaleUtil.getIdioma(getCurrentUser().getIdioma());
     }

    public String getLocale() {
        return locale;
    }

    public void setLocale(String locale) {
        this.locale = locale;
    }

    public Usuarios getCurrentUser()
    {
        return (Usuarios) getSessionMap().get("currentUser");
    }
    public Map<String, Object> getSessionMap() {
        FacesContext context = FacesContext.getCurrentInstance();
        Map<String, Object> sessionMap = context.getExternalContext().getSessionMap();
        return sessionMap;
     }
}

LocaleUtil 

public class LocaleUtil {


    public static String getIdioma(Integer idioma){

        if(idioma == 0){
            return "es_ES";
        } else if (idioma == 1) {
            return "en_US";
        } else if (idioma == 2) {
            return "it_IT";
        } else if (idioma == 3) {
            return "fr_FR";
        } else if (idioma == 4) {
            return "pt_PT";
        } else if (idioma == 5) {
            return "ru_RU";
        } else if (idioma == 6) {
            return "pl_PL";
        }else {
            return "es_ES";
        }

    }

}

错误

Warning:   StandardWrapperValve[Faces Servlet]: Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException
    at com.sun.faces.mgbean.BeanManager$ScopeManager$ViewScopeHandler.getFromScope(BeanManager.java:566)
    at com.sun.faces.mgbean.BeanManager$ScopeManager.getFromScope(BeanManager.java:477)
    at com.sun.faces.mgbean.BeanManager.getBeanFromScope(BeanManager.java:240)
    at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:255)
    at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:117)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:116)
    at com.sun.el.parser.AstValue.getBase(AstValue.java:151)
    at com.sun.el.parser.AstValue.getValue(AstValue.java:200)
    at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:226)
    at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    at com.sun.faces.facelets.tag.TagAttributeImpl.getObject(TagAttributeImpl.java:356)
    at com.sun.faces.facelets.tag.TagAttributeImpl.getObject(TagAttributeImpl.java:276)
    at com.sun.faces.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:211)
    at com.sun.faces.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:93)
    at com.sun.faces.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:87)
    at com.sun.faces.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:161)
    at com.sun.faces.application.view.ViewMetadataImpl.createMetadataView(ViewMetadataImpl.java:140)
    at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:241)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:121)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:344)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:70)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:316)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
    at java.lang.Thread.run(Thread.java:745)

我不认为问题出在nuevoProyectoBacking中，因为它被另一个JSF页面使用，而且语言也很好用。我必须删除那个并创建一个新的外观和感觉。

1 个答案:

答案 0 :(得分：0)

我修好了但我不知道为什么xDDDD

这是我的新JSF页面

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets">

    <ui:composition template="/WEB-INF/templates/template.xhtml">
        <f:event type="preRenderView"
                 listener="#{nuevoProyectoBacking.forwardIfIsNotAdmin}" />

        <ui:define name="top">
            <ui:decorate template="/WEB-INF/templates/menuAdministrador.xhtml"></ui:decorate>
        </ui:define>

        <ui:define name="content">
            <ui:decorate template="/nuevoProyectoTemplate2.xhtml"></ui:decorate>

        </ui:define>
    </ui:composition>
</html>

我已经在/ nuevoProyectoTemplate2中编写了所有HTML代码并且它可以正常工作。

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