org.jboss.resteasy.spi.UnhandledException：javax.persistence.PersistenceException：无法构建实体管理器工厂

Question

当我从客户端发出请求并尝试使用此行时，此错误令我兴奋P​​ersistence.createEntityManagerFactory（ “funcao_usuario_externo”）;

如果我用主方法运行我的类，它运行良好，但是当我发送请求时，此错误写在控制台上。

我的类来获取信息：

​​

我的类来接收请求（直到此时它的工作）：

@Path("/Server") 
public class ChallangeServer { 

@GET 
@Path("/getExternalUserFunction") 
@Produces(MediaType.APPLICATION_JSON) 
public Map<Long, String> getExternalUserFunction() { 
    return new ExternalUserFunctionDataAction().getAll(); 
} 
} 

JPA配置：

 <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <class>br.com.challenge.bean.ExternalUserFunctionBean</class> 
     <properties> 
     <property name="javax.persistence.jdbc.driver" 
         value="org.postgresql.Driver" /> 
     <property name="javax.persistence.jdbc.url" 
         value="jdbc:postgresql://localhost:5432/desafio" /> 
     <property name="javax.persistence.jdbc.user" value="postgres" /> 
     <property name="javax.persistence.jdbc.password" value="123" /> 
     <property name="hibernate.dialect" 
         value="org.hibernate.dialect.PostgreSQLDialect" /> 
     <property name="hibernate.hbm2ddl.auto" value="create" /> 
     <property name="hibernate.show_sql" value="true" /> 
     <property name="hibernate.format_sql" value="true" /> 
     <property name="hibernate.validator.apply_to_ddl" value="false" /> 
     <property name="hibernate.validator.autoregister_listeners" 
      value="false" /> 
     </properties> 
    </persistence-unit> 

有谁知道如何解决这个问题？

23:12:58,203 ERROR [io.undertow.request] (default task-2) UT005023: Exception handling request to /DesafioBack/services/Server/getExternalUserFunction: org.jboss.resteasy.spi.UnhandledException: javax.persistence.PersistenceException: Unable to build entity manager factory 
at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:76) 
at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:212) 
at org.jboss.resteasy.core.SynchronousDispatcher.writeException(SynchronousDispatcher.java:168) 
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:411) 
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:202) 
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221) 
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) 
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) 
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) 
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) 
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) 
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) 
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) 
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) 
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) 
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) 
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) 
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) 
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) 
at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) 
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) 
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) 
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:285) 
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:264) 
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) 
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:175) 
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202) 
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:792) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
at java.lang.Thread.run(Thread.java:745)Caused by: javax.persistence.PersistenceException: Unable to build entity manager factory 
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:66) 
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55) 
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39) 
at br.com.challenge.action.ExternalUserFunctionDataAction.getAll(ExternalUserFunctionDataAction.java:25) 
at br.com.challenge.server.ChallangeServer.getExternalUserFunction(ChallangeServer.java:36) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:498) 
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139) 
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295) 
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249) 
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236) 
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:395) 
... 32 more 
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:244) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:208) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189) 
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51) 
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:217) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189) 
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.handleTypes(MetadataBuildingProcess.java:352) 
at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:111) 
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:847) 
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:874) 
at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:58) 
... 45 more 
Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [org.postgresql.Driver] 
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:229) 
at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.loadDriverIfPossible(DriverManagerConnectionProviderImpl.java:161) 
at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.buildCreator(DriverManagerConnectionProviderImpl.java:117) 
at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:73) 
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:94) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:217) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189) 
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:145) 
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66) 
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) 
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88) 
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:234) 
... 56 more 
Caused by: java.lang.ClassNotFoundException: Could not load requested class : org.postgresql.Driver 
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl$AggregatedClassLoader.findClass(ClassLoaderServiceImpl.java:217) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 
at java.lang.Class.forName0(Native Method) 
at java.lang.Class.forName(Class.java:348) 
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.classForName(ClassLoaderServiceImpl.java:226) 
... 67 more 

Answer 1

您的项目是否包含相应的驱动程序.jar文件？ 检查这里：

https://jdbc.postgresql.org/download.html

它应该在你的应用程序的lib /目录下，可能是在WEB-INF/lib目录

检查是否有你直接在lib文件夹放置在您的PostgreSQL相关的.jar或系统类路径？