JPA不识别我的实体类型：架构类型[实体名称]＆＃xa0;

Question

我正在使用带有Eclipse -link 2.5的Java持久性API来从事JSF产品CRUD应用程序，我想知道为什么JPA不认识我的实体。

这是我的实体课程：

package Models;
import java.io.Serializable;
import javax.persistence.*;

@Entity
@Table(name = "Article")
@NamedQuery(name = "find all articles", query = "SELECT ar FROM ArticleEntity ar")
public class ArticleEntity implements Serializable{
    
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    @Id
    private int code; 
    private String designation;
    private float prixHT;
    private float prixTTC;
    private float marge;
    private float remise;
    private float tva;
    
    public int getCode() {
        return code;
    }
    
    public String getDesignation() {
        return designation;
    }
    
    public float getMarge() {
        return marge;
    }
    
    public float getPrixHT() {
        return prixHT;
    }
    
    public float getPrixTTC() {
        return prixTTC;
    }
    
    public float getRemise() {
        return remise;
    }
    
    public float getTva() {
        return tva;
    }

    public void setCode(int code) {
        this.code = code;
    }
        
    public void setDesignation(String designation) {
        this.designation = designation;
    }
    
    public void setMarge(float marge) {
        this.marge = marge;
    }
    
    public void setPrixHT(float prixHT) {
        this.prixHT = prixHT;
    }
    
    public void setPrixTTC(float prixTTC) {
        this.prixTTC = prixTTC;
    } 
    
    public void setRemise(float remise) {
        this.remise = remise;
    }
    
    public void setTva(float tva) {
        this.tva = tva;
    }

}

这是我班级的实体经理：

package DAO;
import java.util.*;
import javax.persistence.*;
import Models.ArticleEntity;

public class ArticleORM {
    
    private EntityManagerFactory articleMnagerFactory = Persistence.createEntityManagerFactory("JsfDatabase");
    private EntityManager articleManager;
    
    public ArticleORM() {
        this.articleManager = this.articleMnagerFactory.createEntityManager();
    }
    
    public List<ArticleEntity> findAll(){
        this.articleManager.getTransaction().begin();
        Query query = this.articleManager.createQuery("SELECT ar FROM ArticleEntity ar");
        return (List<ArticleEntity>) query.getResultList();
    }

}

这是我的persistence.xml文件：

<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="JsfDatabase" transaction-type="RESOURCE_LOCAL">
        <class>Models.ArticleEntity</class>
        <properties>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/JsfDatabase"/>
            <property name="javax.persistence.jdbc.user" value="root"/>
            <property name="javax.persistence.jdbc.password" value=""/>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
        </properties>
    </persistence-unit>
</persistence>

这是在控制台中丢弃的错误

SEVERE: Servlet.service() for servlet [Faces Servlet] in context with path [/AppJSF] threw exception [An exception occurred while creating a query in EntityManager: 
Exception Description: Problem compiling [SELECT ar FROM ArticleEntity ar]. 
[15, 28] The abstract schema type 'ArticleEntity' is unknown.] with root cause
Local Exception Stack: 
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.7.6.v20200131-b7c997804f): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [SELECT ar FROM ArticleEntity ar]. 
[15, 28] The abstract schema type 'ArticleEntity' is unknown.
    at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildException(HermesParser.java:157)
    at org.eclipse.persistence.internal.jpa.jpql.HermesParser.validate(HermesParser.java:349)
    at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:280)
    at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildQuery(HermesParser.java:165)
    at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:142)
    at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:118)
    at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:104)
    at org.eclipse.persistence.internal.jpa.EJBQueryImpl.<init>(EJBQueryImpl.java:88)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.createQuery(EntityManagerImpl.java:1749)
    at DAO.ArticleORM.findAll(ArticleORM.java:17)
    at Beans.MBArticle.selectAll(MBArticle.java:65)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:568)
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:147)
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:79)
    at org.apache.el.parser.AstValue.getValue(AstValue.java:158)
    at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189)
    at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
    at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
    at javax.faces.component.UIData.getValue(UIData.java:731)
    at org.primefaces.component.api.UIData.getDataModel(UIData.java:768)
    at javax.faces.component.UIData.getRowCount(UIData.java:356)
    at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:1085)
    at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:1064)
    at org.primefaces.component.datatable.DataTableRenderer.encodeRegularTable(DataTableRenderer.java:426)
    at org.primefaces.component.datatable.DataTableRenderer.encodeMarkup(DataTableRenderer.java:361)
    at org.primefaces.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:94)
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1764)
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1757)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
    at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:399)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:833) ```