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JavaEE（tomcatee）和#x2B；Hibernate=错误，为什么？

hibernate maven jpa

JavaEE（tomcatee）和#x2B；Hibernate=错误，为什么？,hibernate,maven,jpa,apache-tomee,Hibernate,Maven,Jpa,Apache Tomee,我有一个工作servlet。这是一个简单的演示（在TomcatEE上） 我想连接ORM-hibernate，但是如果我用persistence.xml编写，我会有很多错误。 谁知道，我怎样才能解决这个问题 config persistence.xml在没有servlet的情况下工作得很好-在主类中：在数据库中记录简单实体，但是如果我将persistence.xml连接到servlet，我会有很多错误 塞尔维特 包ee； 导入java.io.IOException； 导入java.io.Prin

我有一个工作servlet。这是一个简单的演示（在TomcatEE上） 我想连接ORM-hibernate，但是如果我用persistence.xml编写，我会有很多错误。 谁知道，我怎样才能解决这个问题

config persistence.xml在没有servlet的情况下工作得很好-在主类中：在数据库中记录简单实体，但是如果我将persistence.xml连接到servlet，我会有很多错误

塞尔维特


包ee；
导入java.io.IOException；
导入java.io.PrintWriter；
导入javax.ejb.ejb；
导入javax.inject.inject；
导入javax.persistence.*；
导入javax.servlet.ServletException；
导入javax.servlet.http.HttpServlet；
导入javax.servlet.http.HttpServletRequest；
导入javax.servlet.http.HttpServletResponse；
导入javax.servlet.annotation.WebServlet；
@WebServlet（“/你好”）
公共类HelloServlet扩展了HttpServlet{
public void doGet（HttpServletRequest-req，HttpServletResponse-resp）抛出ServletException，IOException{
相应的setContentType（“text/html；charset=utf-8”）；
PrintWriter pw=resp.getWriter（）；
println（“你好！”）；
}
}
实体

package ee;

import javax.enterprise.context.RequestScoped;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
@RequestScoped
public class Student {
    @Id @GeneratedValue
    int id;
    String name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Student() {
    }

    public Student(String name) {
        this.name = name;
    }
}
src/main/resources/META-INF/Beans.xml
xml+一些库与Idea连接


4.0.0
ee7
ee7
1.0-快照
1.8
1.8
org.postgresql
postgresql
42.2.9
org.hibernate
冬眠核心
5.4.10.最终版本
org.hibernate
休眠实体管理器
5.4.10.最终版本
org.hibernate.javax.persistence
hibernate-jpa-2.1-api
1.0.2.1最终版本
和src/main/resources/META-INF/persistence.xml


ee.学生
如果我从org.hibernate.jpa.HibernatePersistenceProvider行中删除注释，我就有问题了

山猫卡塔利纳原木

01-Jan-2020 20:53:43.705 WARNING [main] org.apache.catalina.util.SessionIdGeneratorBase.createSecureRandom Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [123] milliseconds.
01-Jan-2020 20:53:45.243 SEVERE [http-nio-8080-exec-4] jdk.internal.reflect.NativeMethodAccessorImpl.invoke Error destroying child
    org.apache.catalina.LifecycleException: An invalid Lifecycle transition was attempted ([before_destroy]) for component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/unnamed]] in state [STARTING_PREP]
        at org.apache.catalina.util.LifecycleBase.invalidTransition(LifecycleBase.java:430)
        at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:316)
        at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:817)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.undeploy(TomcatWebAppBuilder.java:1656)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.undeploy(TomcatWebAppBuilder.java:1636)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.undeployWebApps(TomcatWebAppBuilder.java:769)
        at org.apache.openejb.assembler.classic.Assembler.destroyApplication(Assembler.java:2407)
        at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:1094)
        at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:758)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.startInternal(TomcatWebAppBuilder.java:1308)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.configureStart(TomcatWebAppBuilder.java:1130)
        at org.apache.tomee.catalina.GlobalListenerSupport.lifecycleEvent(GlobalListenerSupport.java:134)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5048)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.deployWar(TomcatWebAppBuilder.java:657)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.deployWebApps(TomcatWebAppBuilder.java:597)
        at org.apache.tomee.catalina.deployment.TomcatWebappDeployer.deploy(TomcatWebappDeployer.java:47)
        at org.apache.openejb.assembler.DeployerEjb.deploy(DeployerEjb.java:177)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.security.internal.InternalSecurityInterceptor.invoke(InternalSecurityInterceptor.java:35)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.monitoring.StatsInterceptor.record(StatsInterceptor.java:191)
        at org.apache.openejb.monitoring.StatsInterceptor.invoke(StatsInterceptor.java:102)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.core.interceptor.InterceptorStack.invoke(InterceptorStack.java:85)
        at org.apache.openejb.core.singleton.SingletonContainer._invoke(SingletonContainer.java:272)
        at org.apache.openejb.core.singleton.SingletonContainer.invoke(SingletonContainer.java:221)
        at org.apache.openejb.server.ejbd.EjbRequestHandler.doEjbObject_BUSINESS_METHOD(EjbRequestHandler.java:371)
        at org.apache.openejb.server.ejbd.EjbRequestHandler.processRequest(EjbRequestHandler.java:182)
        at org.apache.openejb.server.ejbd.EjbDaemon.processEjbRequest(EjbDaemon.java:360)
        at org.apache.openejb.server.ejbd.EjbDaemon.service(EjbDaemon.java:247)
        at org.apache.openejb.server.ejbd.EjbServer.service(EjbServer.java:104)
        at org.apache.openejb.server.httpd.ServerServlet.service(ServerServlet.java:60)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.tomee.catalina.OpenEJBSecurityListener$RequestCapturer.invoke(OpenEJBSecurityListener.java:97)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.base/java.lang.Thread.run(Thread.java:835)
01-Jan-2020 20:53:45.278 SEVERE [http-nio-8080-exec-4] org.apache.openejb.assembler.classic.Assembler.destroyApplication undeployException original cause
    java.lang.Exception: deployment not found: unnamed.Comp2131179558
        at org.apache.openejb.assembler.classic.Assembler.destroyApplication(Assembler.java:2360)
        at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:1094)
        at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:758)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.startInternal(TomcatWebAppBuilder.java:1308)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.configureStart(TomcatWebAppBuilder.java:1130)
        at org.apache.tomee.catalina.GlobalListenerSupport.lifecycleEvent(GlobalListenerSupport.java:134)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5048)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.deployWar(TomcatWebAppBuilder.java:657)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.deployWebApps(TomcatWebAppBuilder.java:597)
        at org.apache.tomee.catalina.deployment.TomcatWebappDeployer.deploy(TomcatWebappDeployer.java:47)
        at org.apache.openejb.assembler.DeployerEjb.deploy(DeployerEjb.java:177)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.security.internal.InternalSecurityInterceptor.invoke(InternalSecurityInterceptor.java:35)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.monitoring.StatsInterceptor.record(StatsInterceptor.java:191)
        at org.apache.openejb.monitoring.StatsInterceptor.invoke(StatsInterceptor.java:102)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.core.interceptor.InterceptorStack.invoke(InterceptorStack.java:85)
        at org.apache.openejb.core.singleton.SingletonContainer._invoke(SingletonContainer.java:272)
        at org.apache.openejb.core.singleton.SingletonContainer.invoke(SingletonContainer.java:221)
        at org.apache.openejb.server.ejbd.EjbRequestHandler.doEjbObject_BUSINESS_METHOD(EjbRequestHandler.java:371)
        at org.apache.openejb.server.ejbd.EjbRequestHandler.processRequest(EjbRequestHandler.java:182)
        at org.apache.openejb.server.ejbd.EjbDaemon.processEjbRequest(EjbDaemon.java:360)
        at org.apache.openejb.server.ejbd.EjbDaemon.service(EjbDaemon.java:247)
        at org.apache.openejb.server.ejbd.EjbServer.service(EjbServer.java:104)
        at org.apache.openejb.server.httpd.ServerServlet.service(ServerServlet.java:60)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.tomee.catalina.OpenEJBSecurityListener$RequestCapturer.invoke(OpenEJBSecurityListener.java:97)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.base/java.lang.Thread.run(Thread.java:835)
01-Jan-2020 20:53:45.279 SEVERE [http-nio-8080-exec-4] org.apache.openejb.assembler.classic.Assembler.destroyApplication undeployException original cause
    java.lang.Exception: persistence-unit: myPerName777 2059072287localhost: Name "openejb/PersistenceUnit/myPerName777 2059072287localhost" not found.
        at org.apache.openejb.assembler.classic.Assembler.destroyApplication(Assembler.java:2519)
        at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:1094)
        at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:758)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.startInternal(TomcatWebAppBuilder.java:1308)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.configureStart(TomcatWebAppBuilder.java:1130)
        at org.apache.tomee.catalina.GlobalListenerSupport.lifecycleEvent(GlobalListenerSupport.java:134)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5048)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.deployWar(TomcatWebAppBuilder.java:657)
        at org.apache.tomee.catalina.TomcatWebAppBuilder.deployWebApps(TomcatWebAppBuilder.java:597)
        at org.apache.tomee.catalina.deployment.TomcatWebappDeployer.deploy(TomcatWebappDeployer.java:47)
        at org.apache.openejb.assembler.DeployerEjb.deploy(DeployerEjb.java:177)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.security.internal.InternalSecurityInterceptor.invoke(InternalSecurityInterceptor.java:35)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.monitoring.StatsInterceptor.record(StatsInterceptor.java:191)
        at org.apache.openejb.monitoring.StatsInterceptor.invoke(StatsInterceptor.java:102)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext$Invocation.invoke(ReflectionInvocationContext.java:205)
        at org.apache.openejb.core.interceptor.ReflectionInvocationContext.proceed(ReflectionInvocationContext.java:186)
        at org.apache.openejb.core.interceptor.InterceptorStack.invoke(InterceptorStack.java:85)
        at org.apache.openejb.core.singleton.SingletonContainer._invoke(SingletonContainer.java:272)
        at org.apache.openejb.core.singleton.SingletonContainer.invoke(SingletonContainer.java:221)
        at org.apache.openejb.server.ejbd.EjbRequestHandler.doEjbObject_BUSINESS_METHOD(EjbRequestHandler.java:371)
        at org.apache.openejb.server.ejbd.EjbRequestHandler.processRequest(EjbRequestHandler.java:182)
        at org.apache.openejb.server.ejbd.EjbDaemon.processEjbRequest(EjbDaemon.java:360)
        at org.apache.openejb.server.ejbd.EjbDaemon.service(EjbDaemon.java:247)
        at org.apache.openejb.server.ejbd.EjbServer.service(EjbServer.java:104)
        at org.apache.openejb.server.httpd.ServerServlet.service(ServerServlet.java:60)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)

    etc...
为什么？

可能是因为“Name”openejb/PersistenceUnit/myPerName777 2059072287localhost“找不到”。谢谢！但是，事实是我没有使用它，我只是想把它连接起来。我应该在哪里指定名称myPerName777？+我不明白为什么这个persistence.xml和entity在没有servlet的情况下可以很好地工作。我不明白我现在必须做什么。这个单元名写在哪里？您使用的是TOME，它是一个成熟的JavaEE服务器。因此，它已经和其他JPA一起出厂，无需手动安装任何东西（就像您为barebones Tomcat所做的那样）。TomEE附带了OpenJPA，但您基本上是试图通过webapp手动安装它，用Hibernate来取代它。为什么？巴卢斯克，谢谢你的回答。我想使用hibernate。请告诉我，我怎样才能断开OpenJPA与我的项目的连接？我该怎么办？