我有一个带有使用转换器的 JSF 页面的 Java EE 8 Web 项目（战争）。
当我尝试加载该页面时（在 mvn clean compile package 和 java -jar payara-micro-5.191.jar --deploy rbooking.war 之后）“有时”找不到转换器类。
要解决这个问题，唯一的办法就是重新编译war。
这里有一些细节：
pom文件：
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>sartorieinformatiche.it.rbooking</groupId>
<artifactId>rbooking</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<failOnMissingWebXml>false</failOnMissingWebXml>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>
<repositories>
<repository>
<id>prime-repo</id>
<name>PrimeFaces Maven Repository</name>
<url>http://repository.primefaces.org</url>
<layout>default</layout>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-email</artifactId>
<version>1.5</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>8.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>7.0</version>
</dependency>
<dependency>
<groupId>org.primefaces.themes</groupId>
<artifactId>all-themes</artifactId>
<version>1.0.10</version>
</dependency>
<dependency>
<groupId>uaihebert.com</groupId>
<artifactId>uaiCriteria</artifactId>
<version>4.0.0</version>
</dependency>
<dependency>
<groupId>org.omnifaces</groupId>
<artifactId>omnifaces</artifactId>
<version>3.3</version>
</dependency>
</dependencies>
<build>
<finalName>rbooking</finalName>
</build>
</project>
转换器类：
package sartorieinformatiche.it.rbooking.control;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.FacesConverter;
import javax.inject.Inject;
import sartorieinformatiche.it.rbooking.entity.Language;
@FacesConverter(value = "languageConverter", managed = true)
public class LanguageConverter implements Converter<Language> {
@Inject
private LanguageService languageService;
@Override
public String getAsString(FacesContext context, UIComponent component, Language language) {
if (language == null) {
return "";
}
return language.getId().toString();
}
@Override
public Language getAsObject(FacesContext context, UIComponent component, String value) {
if (value == null || value.trim().isEmpty()) {
return null;
}
Long id = Long.parseLong(value);
return languageService.findById(id);
}
}
JSF 页面片段：
...<p:selectOneMenu id="language"
value="#{bookingBean.booking.language}"
converter="languageConverter">
<f:selectItems value="#{bookingBean.allLanguages}"
itemLabel="#{language.description}"
itemValue="#{language.id}" />
<p:column>
<h:outputText value="#{language.description}" />
</p:column>
</p:selectOneMenu>...
加载 JSF 页面时的错误：
StandardWrapperValve[Faces Servlet]: Servlet.service() for servlet Faces Servlet threw exception
javax.faces.FacesException: Expression Error: Named Object: languageConverter not found.
at com.sun.faces.util.Util.notNullNamedObject(Util.java:467)
at com.sun.faces.application.applicationimpl.InstanceFactory.createConverter(InstanceFactory.java:456)
at com.sun.faces.application.ApplicationImpl.createConverter(ApplicationImpl.java:502)
at javax.faces.application.ApplicationWrapper.createConverter(ApplicationWrapper.java:420)
at org.omnifaces.cdi.converter.ConverterManager.createConverter(ConverterManager.java:131)
at org.omnifaces.cdi.converter.ConverterManager$Proxy$_$$_WeldClientProxy.createConverter(Unknown Source)
at org.omnifaces.application.OmniApplication.createConverter(OmniApplication.java:83)
at com.sun.faces.facelets.tag.jsf.ValueHolderRule$LiteralConverterMetadata.applyMetadata(ValueHolderRule.java:45)
at com.sun.faces.facelets.tag.MetadataImpl.applyMetadata(MetadataImpl.java:40)
at javax.faces.view.facelets.MetaTagHandler.setAttributes(MetaTagHandler.java:100)
at javax.faces.view.facelets.DelegatingMetaTagHandler.setAttributes(DelegatingMetaTagHandler.java:92)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.doNewComponentActions(ComponentTagHandlerDelegateImpl.java:453)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:155)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:55)
at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:179)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:55)
at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:179)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:179)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:179)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:55)
at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:179)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:137)
at com.sun.faces.facelets.tag.jsf.ComponentTagHandlerDelegateImpl.apply(ComponentTagHandlerDelegateImpl.java:179)
at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:111)
at javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:55)
at com.sun.faces.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:52)
at com.sun.faces.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:46)
at com.sun.faces.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:120)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.buildView(FaceletViewHandlingStrategy.java:358)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:76)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:199)
at javax.faces.webapp.FacesServlet.executeLifecyle(FacesServlet.java:708)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:451)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1628)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:339)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:305)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:251)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:209)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:755)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:575)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:159)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:371)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:238)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:520)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:217)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:182)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:156)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:218)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:95)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:260)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:177)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:109)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:88)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:53)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:524)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:89)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:94)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$0(WorkerThreadIOStrategy.java:90)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:114)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:569)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:549)
at java.lang.Thread.run(Thread.java:748)
为了解决这个问题，我必须重新编译项目并正确加载转换器......
有什么想法可以解决这个问题吗？
PS：我正在使用 OpenJDK 运行时环境（构建 1.8.0_212-8u212-b03-0ubuntu1.16.04.1-b03）Linux Mint 18.3 Sylvia。