我正在尝试使用Intellij Idea上的Hibernate连接数据库。
Bean文件是基于Hibernate实体类自动生成的。
public class SirketEntityManagedBean {
private EntityManagerFactory myEntityManagerFactory;
public SirketEntityManagedBean() {
myEntityManagerFactory = Persistence.createEntityManagerFactory("hibernate.cfg.xml");
}
// ...
}
当我运行它时,会抛出以下异常:
javax.persistence.PersistenceException:没有名为hibernate.cfg.xml的EntityManager的持久性提供程序 javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69) javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47) beans.SirketEntityManagedBean<初始化>(SirketEntityManagedBean.java:40) sun.reflect.NativeConstructorAccessorImpl.newInstance0(本机方法) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) java.lang.reflect.Constructor.newInstance(Constructor.java:423) java.lang.Class.newInstance(Class.java:442) com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:186) com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:100) com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409) com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269) com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244) com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116) com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176) com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203) org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:71) org.apache.el.parser.AstValue.getValue(AstValue.java:161) org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184) com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109) javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194) org.primefaces.component.panelmenu.PanelMenu.getModel(PanelMenu.java:84) org.primefaces.component.menu.BaseMenuRenderer.encodeEnd(BaseMenuRenderer.java:108) javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) javax.faces.component.UIComponent.encodeAll(UIComponent.java:1903) javax.faces.render.Renderer.encodeChildren(Renderer.java:176) javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:889) org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:84) org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:71) org.primefaces.component.layout.LayoutUnitRenderer.encodeEnd(LayoutUnitRenderer.java:49) javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) javax.faces.component.UIComponent.encodeAll(UIComponent.java:1903) javax.faces.component.UIComponent.encodeAll(UIComponent.java:1899) javax.faces.component.UIComponent.encodeAll(UIComponent.java:1899) javax.faces.component.UIComponent.encodeAll(UIComponent.java:1899) com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:451) com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120) com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219) javax.faces.webapp.FacesServlet.service(FacesServlet.java:647) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
这是persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="NewPersistenceUnit">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>hib.OrtamEntity</class>
<class>hib.SorumluEntity</class>
<class>hib.SirketEntity</class>
<class>hib.VpnkullaniciEntity</class>
<properties>
<property name="hibernate.connection.url" value="jdbc:oracle:thin:@//XXX.X.XX.XX:1521/PROD"/>
<property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>
<property name="hibernate.connection.username" value="XXTEST"/>
<property name="hibernate.connection.password" value="XXTEST"/>
<property name="hibernate.archive.autodetection" value="class"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>
这是项目目录:
这是如何引起的?如何解决?
答案 0 :(得分:3)
createEntityManagerFactory
方法的名称为persistence-unit
。某些Hibernate
配置文件( hibernate.cfg.xml )不是persistence-unit
的名称。在文件 persistence.xml 中指定了persistence-unit
。这将在任何JPA文档中充分描述,您显然没有阅读
答案 1 :(得分:1)
createEntityManagerFactory
方法将persistent unit
作为参数。持久性单元在名为persistence.xml
的文件中描述,此文件应位于项目的类路径中。
例如,如果您的持久单元名称是&#34; exampledb&#34;,那么方法调用将是 -
EntityManagerFactory exDb = Persistence.createEntityManagerFactory(&#34; exampledb&#34);
请参阅this问题,另请参阅persistence.xml的示例
答案 2 :(得分:0)
可能是因为bean的定义。您是否在xml配置文件中定义了bean定义?如果您这样做,请检查配置文件中的类名称。如果您没有,请在课程定义的顶部添加@ManagedBean(name = "sirketEntity")
。
像这样:
@ManagedBean(name = "sirketEntity")
public class SirketEntityManagedBean {