我在旧问题中搜索过，但我发现没什么用处;我也搜索了很多东西 我有一个简单的primefaces autocomplete如此定义：
<p:autoComplete id="comNascita"
value="#{gestioneDomandaResFormBean.datiDomanda.datiAnagrafici.comuneNascita}"
required="true"
converter="deComuneConverter"
forceSelection="true"
var="comune"
itemLabel="#{comune.descrizione}"
label="#{ui['ui.res.creaDomanda.crea.domanda.form.comuneNascita']}"
itemValue="#{comune}"
emptyMessage="Nullo"
completeMethod="#{decodificheBeanSvil.completeComuni}"
size="55"
minQueryLength="2"
styleClass="w100"
cache="true"
widgetVar="comNascitaWV"
maxResults="10"/>
这是我的转换器：
@FacesConverter("deComuneConverter")
public class DeComuneConverter implements Converter
{
protected final Logger logger = LoggerFactory.getLogger(this.getClass());
private DeComuneEJB deComuneManager = null;
@Override
public Object getAsObject(FacesContext context, UIComponent component, String value)
{
if (value == null || value.trim().equals(""))
{
if( logger.isDebugEnabled() )
{
logger.debug("Metodo getAsObject. Passato un value nullo o vuoto <"+value+">. Restituisco null");
}
return null;
}
else
{
DeComune deComune = null;
try
{
deComune = deComuneManager.findById(value);
}
catch (Exception e)
{
if( logger.isWarnEnabled() )
{
logger.warn("Errore nella converter dei comuni; "+e.getMessage(), e);
}
}
return deComune;
}
}
@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
if (value == null || (value instanceof String && ((String)value).trim().equals("")))
{
if( logger.isDebugEnabled() )
{
logger.debug("Metodo getAsString. Passato un value nullo o vuoto <"+value+">; restituisco stringa vuota");
}
return "";
} else {
return String.valueOf(((DeComune) value).getCodCom());
}
}
@PostConstruct
public void initialize() throws Exception
{
InitialContext ic = null;
try
{
ic = new InitialContext();
deComuneManager = (DeComuneEJB) ic.lookup("java:module/"+DeComuneEJB.class.getSimpleName());
}
catch (Exception e) {
if( logger.isErrorEnabled() )
{
logger.error("Errore nella ricerca JNDI dell'EJB per i comuni", e);
}
throw e;
}
finally
{
if( ic != null )
{
ic.close();
}
}
}
}
这是我用完整方法的bean：
@ManagedBean(name = "decodificheBeanSvil")
@ApplicationScoped
public class DecodificheBeanSvil implements Serializable {
private static final long serialVersionUID = -5773268651349037154L;
protected static final Log log = LogFactory.getLog(DecodificheBeanSvil.class);
protected Date currentDate;
@PostConstruct
protected void postConstruct() {
currentDate = new Date();
}
public GenereEnum[] getGenereList() {
return GenereEnum.values();
}
public List<DeComune> completeComuni(String startsWith)
{
List<DeComune> result = new ArrayList<DeComune>();
Map<String, DeComune> comuniFake = FakeUtils.getComuniEr();
Iterator<String> chiaviIterator = comuniFake.keySet().iterator();
while (chiaviIterator.hasNext()) {
String chiave = chiaviIterator.next();
if( chiave.startsWith(startsWith.toLowerCase()) )
{
result.add(comuniFake.get(chiave));
}
}
return result;
}
}
这是我的DeComune POJO：
public class DeComune implements Serializable, Comparable<DeComune> {
private static final long serialVersionUID = -6250752442360948142L;
private String codCom;
private String descrizione;
private String cap;
public DeComune() {
super();
}
public DeComune(String codCom, String descrizione, String cap) {
super();
this.codCom = codCom;
this.descrizione = descrizione;
this.cap = cap;
}
public String getCodCom() {
return codCom;
}
public void setCodCom(String codCom) {
this.codCom = codCom;
}
public String getDescrizione() {
return descrizione;
}
public void setDescrizione(String descrizione) {
this.descrizione = descrizione;
}
public String getCap() {
return cap;
}
public void setCap(String cap) {
this.cap = cap;
}
@Override
public int compareTo(DeComune o) {
return this.descrizione.compareTo(o.getDescrizione());
}
}
这是我的FakeUtils
public abstract class FakeUtils {
private static List<String> elencoComuniFake;
private static Map<String, DeComune> elencoDeComuneFake;
public static List<DeComune> fakeComuni()
{
elencoDeComuneFake = getMap();
List<DeComune> result = new ArrayList<DeComune>(elencoComuniFake.size());
result.addAll(elencoDeComuneFake.values());
return result;
}
public static Map<String, DeComune> getComuniEr()
{
if( elencoDeComuneFake == null )
{
elencoDeComuneFake = getMap();
}
return elencoDeComuneFake;
}
public static DeComune getById( String id )
{
if( elencoDeComuneFake == null )
{
elencoDeComuneFake = getMap();
}
return elencoDeComuneFake.get(id.trim().toLowerCase());
}
private static Map<String, DeComune> getMap()
{
if( elencoDeComuneFake == null )
{
elencoComuniFake = elencoComuniFake();
elencoDeComuneFake = new HashMap<String, DeComune>(elencoComuniFake.size());
for (String nomeComune : elencoComuniFake)
{
elencoDeComuneFake.put(nomeComune.trim().toLowerCase(), new DeComune(nomeComune, nomeComune, nomeComune));
}
}
return elencoDeComuneFake;
}
private static List<String> elencoComuniFake()
{
if( elencoComuniFake == null )
{
elencoComuniFake = new ArrayList<String>();
elencoComuniFake.add("Agazzano");
elencoComuniFake.add("Albareto");
}
return elencoComuniFake;
}
}
当我在autocomplet字段中输入内容时，我得到以下异常：
11:33:07,235 SEVERE [javax.enterprise.resource.webcontainer.jsf.application] (http-localhost/127.0.0.1:20000-3) Error Rendering View[/secure/domanda/_form/creaDomanda.xhtml]: javax.faces.event.AbortProcessingException: java.lang.NullPointerException
at org.primefaces.context.PrimePartialResponseWriter.startMetadataIfNecessary(PrimePartialResponseWriter.java:303) [primefaces-6.0.jar:6.0]
at org.primefaces.context.PrimePartialResponseWriter.startUpdate(PrimePartialResponseWriter.java:142) [primefaces-6.0.jar:6.0]
at org.omnifaces.context.OmniPartialViewContext$OmniPartialResponseWriter.startUpdate(OmniPartialViewContext.java:300) [omnifaces-2.0.jar:2.0]
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:541) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1611) [jsf-api-2.1.29-03.jar:2.1]
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622) [jsf-api-2.1.29-03.jar:2.1]
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622) [jsf-api-2.1.29-03.jar:2.1]
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:383) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:302) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:57) [primefaces-6.0.jar:6.0]
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183) [jsf-api-2.1.29-03.jar:2.1]
at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:973) [jsf-api-2.1.29-03.jar:2.1]
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1778) [jsf-api-2.1.29-03.jar:2.1]
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:426) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at com.ocpsoft.pretty.faces.application.PrettyViewHandler.renderView(PrettyViewHandler.java:163) [prettyfaces-jsf2-3.3.3.jar:]
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286) [jsf-api-2.1.29-03.jar:2.1]
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286) [jsf-api-2.1.29-03.jar:2.1]
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) [jsf-impl-2.1.29-03.jar:2.1.29-03]
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:604) [jsf-api-2.1.29-03.jar:2.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:145) [prettyfaces-jsf2-3.3.3.jar:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:840) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:622) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:560) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:488) [jbossweb-7.0.17.Final.jar:]
at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:137) [prettyfaces-jsf2-3.3.3.jar:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at it.eng.sil.res.controller.filter.VerificaAccessoFilter.doFilter(VerificaAccessoFilter.java:93) [classes:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.jasig.cas.client.util.HttpServletRequestWrapperFilter.doFilter(HttpServletRequestWrapperFilter.java:75) [cas-client-core-3.2.1.jar:3.2.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.jasig.cas.client.authentication.AuthenticationFilter.doFilter(AuthenticationFilter.java:107) [cas-client-core-3.2.1.jar:3.2.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:201) [cas-client-core-3.2.1.jar:3.2.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:76) [cas-client-core-3.2.1.jar:3.2.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at it.eng.sil.res.controller.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:95) [classes:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.17.Final.jar:]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.3.Final.jar:7.1.3.Final]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:165) [jboss-as-web-7.1.3.Final.jar:7.1.3.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.17.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372) [jbossweb-7.0.17.Final.jar:]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.17.Final.jar:]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:679) [jbossweb-7.0.17.Final.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:931) [jbossweb-7.0.17.Final.jar:]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_67]
Caused by: java.lang.NullPointerException
at org.primefaces.util.ResourceUtils.filterStylesheets(ResourceUtils.java:96) [primefaces-6.0.jar:6.0]
at org.primefaces.context.PrimePartialResponseWriter.startMetadataIfNecessary(PrimePartialResponseWriter.java:287) [primefaces-6.0.jar:6.0]
... 64 more
我几个小时就到了这里......有人知道我的问题是什么吗？
谢谢