EJB，JPA persistence.xml问题Wildfly 8.2 intellij

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我正在使用intellij Idea创建一个带有JPA和Jboss 8.2的EJB：我正在构建一个jar文件作为输出，当我解压缩jar文件时，在meta-info文件夹中找不到persistance.xml，当我在那里运行服务器时它给出了我找不到一个例外单位名称。是否有解决方案和thanx很多。

这个persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
    <persistence-unit name="EJBUser" transaction-type="JTA">
        <jta-data-source>java:/EJBUser</jta-data-source>
        <class>entities.User</class>
        <properties>
            <property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
        </properties>
    </persistence-unit>
</persistence>

这是我的豆子

package ejb;

import bl.UserLocal;
import entities.User;

import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
 * Created by mehdi on 04/02/2019.
 */
@Stateless(name = "UserImpLocalEJB")
public class UserImpLocalBean implements UserLocal{
    @PersistenceContext(unitName = "EJBUser")
    private EntityManager em;
    public UserImpLocalBean() {
    }

    @Override
    public User addUser(User user) {
        em.persist(user);
        return user;
    }
}

最后这是例外;

20:10:40,122 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-5) MSC000001: Failed to start service jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL: JBAS018733: Failed to process phase INSTALL of deployment "EJBUser_ejb exploded.jar"
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:166) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_191]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_191]
    at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_191]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011047: Component class ejb.UserImpLocalBean for component UserImpLocalEJB has errors: 
JBAS011440: Can't find a persistence unit named EJBUser in deployment "EJBUser_ejb exploded.jar"
    at org.jboss.as.ee.component.deployers.ModuleJndiBindingProcessor$1.handle(ModuleJndiBindingProcessor.java:159)
    at org.jboss.as.ee.component.ClassDescriptionTraversal.run(ClassDescriptionTraversal.java:54)
    at org.jboss.as.ee.component.deployers.ModuleJndiBindingProcessor.processClassConfigurations(ModuleJndiBindingProcessor.java:152)
    at org.jboss.as.ee.component.deployers.ModuleJndiBindingProcessor.deploy(ModuleJndiBindingProcessor.java:145)
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:159) [wildfly-server-8.2.0.Final.jar:8.2.0.Final]
    ... 5 more

20:10:40,133 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 2) JBAS014613: Operation ("deploy") failed - address: ([("deployment" => "EJBUser_ejb exploded.jar")]) - failure description: {
    "JBAS014671: Failed services" => {"jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL: JBAS018733: Failed to process phase INSTALL of deployment "EJBUser_ejb exploded.jar"
    Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011047: Component class ejb.UserImpLocalBean for component UserImpLocalEJB has errors: 
JBAS011440: Can't find a persistence unit named EJBUser in deployment "EJBUser_ejb exploded.jar""},
    "JBAS014771: Services with missing/unavailable dependencies" => [
        "jboss.deployment.unit."EJBUser_ejb exploded.jar".weld.weldClassIntrospector is missing [jboss.deployment.unit."EJBUser_ejb exploded.jar".beanmanager]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.Validator is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InAppClientContainer is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InstanceName is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.ValidatorFactory is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]"
    ]
}
20:10:40,137 ERROR [org.jboss.as.server] (management-handler-thread - 2) JBAS015870: Deploy of deployment "EJBUser_ejb exploded.jar" was rolled back with the following failure message: 
{
    "JBAS014671: Failed services" => {"jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL: JBAS018733: Failed to process phase INSTALL of deployment "EJBUser_ejb exploded.jar"
    Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011047: Component class ejb.UserImpLocalBean for component UserImpLocalEJB has errors: 
JBAS011440: Can't find a persistence unit named EJBUser in deployment "EJBUser_ejb exploded.jar""},
    "JBAS014771: Services with missing/unavailable dependencies" => [
        "jboss.deployment.unit."EJBUser_ejb exploded.jar".weld.weldClassIntrospector is missing [jboss.deployment.unit."EJBUser_ejb exploded.jar".beanmanager]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.Validator is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InAppClientContainer is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InstanceName is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]",
        "jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.ValidatorFactory is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]"
    ]
}
20:10:40,150 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-7) JBAS015877: Stopped deployment EJBUser_ejb exploded.jar (runtime-name: EJBUser_ejb exploded.jar) in 13ms
20:10:40,152 INFO  [org.jboss.as.controller] (management-handler-thread - 2) JBAS014774: Service status report
JBAS014775:    New missing/unsatisfied dependencies:
      service jboss.deployment.unit."EJBUser_ejb exploded.jar".beanmanager (missing) dependents: [service jboss.deployment.unit."EJBUser_ejb exploded.jar".weld.weldClassIntrospector] 
      service jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB (missing) dependents: [service jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InstanceName, service jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.Validator, service jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InAppClientContainer, service jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.ValidatorFactory] 
JBAS014777:   Services which failed to start:      service jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL

[2019-02-04 08:10:40,229] Artifact EJBUser:ejb exploded: Error during artifact deployment. See server log for details.
[2019-02-04 08:10:40,250] Artifact EJBUser:ejb exploded: java.lang.Exception: {"JBAS014671: Failed services" => {"jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL" => "org.jboss.msc.service.StartException in service jboss.deployment.unit."EJBUser_ejb exploded.jar".INSTALL: JBAS018733: Failed to process phase INSTALL of deployment "EJBUser_ejb exploded.jar"
    Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011047: Component class ejb.UserImpLocalBean for component UserImpLocalEJB has errors: 
JBAS011440: Can't find a persistence unit named EJBUser in deployment "EJBUser_ejb exploded.jar""},"JBAS014771: Services with missing/unavailable dependencies" => ["jboss.deployment.unit."EJBUser_ejb exploded.jar".weld.weldClassIntrospector is missing [jboss.deployment.unit."EJBUser_ejb exploded.jar".beanmanager]","jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.Validator is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]","jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InAppClientContainer is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]","jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.InstanceName is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]","jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB.ValidatorFactory is missing [jboss.naming.context.java.comp."EJBUser_ejb exploded"."EJBUser_ejb exploded".UserImpLocalEJB]"]}
答案

正如您已经从错误日志中发现的那样，Wildfly抱怨它无法在EJB中找到持久性上下文，因为JAR中缺少persistence.xml文件。它必须保存在META-INF目录的根级别。

如果您希望IntelliJ自动将其打包到JAR中的META-INF目录中，META-INF/persistence.xml应该位于IntelliJ的源根目录下。

另一答案

我通过从项目结构the image describe how to add it 添加JPA描述符来解决它

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