我正在为学校运动创建一个小程序。我不知道我哪里做错了什么。有人可以帮帮我吗？
运行测试时出现此错误。我在this.emf = TestUtil.getEMF();行收到了错误。
/*
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*/
package herkansing;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
@Entity
@NamedQueries({
@NamedQuery(name = "Account.getAll", query = "select a from Account as a"),
@NamedQuery(name = "Account.count", query = "select count(a) from Account as a"),
@NamedQuery(name = "Account.findByAccountNr", query = "select a from Account as a where a.accountNr = :accountNr")
})
public class Player implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long Id;
private Long accountNr;
private String email;
private Long money;
private Long points;
public Player() {
}
public Player(Long accountNr){
money = 0L;
points = 0L;
this.accountNr = accountNr;
}
//<editor-fold defaultstate="collapsed" desc="getters and setters ....">
public Boolean add(Long amount) {
if (money + amount >= points) {
money += amount;
return true;
} else {
return false;
}
}
public Long getId() {
return Id;
}
public void setId(Long id) {
this.Id = id;
}
public Long getAccountNr() {
return accountNr;
}
public void setAccountNr(Long nr) {
this.accountNr = nr;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Long getMoney() {
return money;
}
public void setMoney(Long money) {
this.money = money;
}
public Long getPoints() {
return points;
}
public void setPoints(Long points) {
this.points = points;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Player other = (Player) obj;
if (this.accountNr != other.accountNr && (this.accountNr == null || !this.accountNr.equals(other.accountNr))) {
return false;
}
if (this.money != other.money && (this.money == null || !this.money.equals(other.money))) {
return false;
}
if (this.points != other.points && (this.points == null || !this.points.equals(other.points))) {
return false;
}
return true;
}
}
玩家类
<?xml version="1.0" encoding="UTF-8"?>
<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="playerPU" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>herkansing.Player</class>
<shared-cache-mode>NONE</shared-cache-mode>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/?user=root"/>
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.password" value="root"/>
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
<!--adds logging-->
<property name="eclipselink.logging.logger" value="DefaultLogger"/>
<property name="eclipselink.logging.level" value="FINE"/>
</properties>
</persistence-unit>
</persistence>
的persistence.xml
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package herkansing;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
/**
*
* @author Bart
*/
public class TestUtil {
static final EntityManagerFactory emf = Persistence.createEntityManagerFactory("playerPU");
/**
*
* @return the number of Accounts stored in the database
*/
static public int getNrOfAccountRecordsInDB() {
EntityManager em = getEMF().createEntityManager();
return ((Number) em.createNamedQuery("Player.count").getSingleResult()).intValue();
}
/**
* Search for an entity of the specified class and primary key.
*
* @param id
* @return the found Account instance or null if the entity does not exist
*/
static public Player getAccountById(Long id) {
EntityManager em = getEMF().createEntityManager();
return em.find(Player.class, id);
}
static public EntityManagerFactory getEMF() {
return emf;
}
}
TestUtil类
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package herkansingTest;
import herkansing.TestUtil;
import herkansing.DatabaseCleaner;
import herkansing.Player;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
/**
*
* @author Bart
*/
public class PlayerTest {
final EntityManagerFactory emf;
EntityManager em, em1, em2;
private static final Logger LOG = Logger.getLogger(PlayerTest.class.getName());
public PlayerTest() {
this.emf = TestUtil.getEMF();
}
@Before
public void setUp() {
em = emf.createEntityManager();
em1 = emf.createEntityManager();
em2 = emf.createEntityManager();
new DatabaseCleaner().resetDatabase();
}
}
PlayerTest
java.lang.ExceptionInInitializerError
at herkansingTest.PlayerTest.<init>(PlayerTest.java:34)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-28019] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Deployment of PersistenceUnit [playerPU] failed. Close all factories for this PersistenceUnit.
Internal Exception: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [select a from Account as a].
[14, 21] The abstract schema type 'Account' is unknown.
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createDeployFailedPersistenceException(EntityManagerSetupImpl.java:866)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:806)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getAbstractSession(EntityManagerFactoryDelegate.java:205)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:183)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getDatabaseSession(EntityManagerFactoryImpl.java:528)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactoryImpl(PersistenceProvider.java:146)
at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:183)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at herkansing.TestUtil.<clinit>(TestUtil.java:18)
... 31 more
Caused by: Exception [EclipseLink-28019] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Deployment of PersistenceUnit [playerPU] failed. Close all factories for this PersistenceUnit.
Internal Exception: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [select a from Account as a].
[14, 21] The abstract schema type 'Account' is unknown.
at org.eclipse.persistence.exceptions.EntityManagerSetupException.deployFailed(EntityManagerSetupException.java:239)
... 41 more
Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Problem compiling [select a from Account as a].
[14, 21] The abstract schema type 'Account' is unknown.
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildException(HermesParser.java:155)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.validate(HermesParser.java:347)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.populateQueryImp(HermesParser.java:278)
at org.eclipse.persistence.internal.jpa.jpql.HermesParser.buildQuery(HermesParser.java:163)
at org.eclipse.persistence.internal.jpa.EJBQueryImpl.buildEJBQLDatabaseQuery(EJBQueryImpl.java:142)
at org.eclipse.persistence.internal.jpa.JPAQuery.processJPQLQuery(JPAQuery.java:223)
at org.eclipse.persistence.internal.jpa.JPAQuery.prepare(JPAQuery.java:184)
at org.eclipse.persistence.queries.DatabaseQuery.prepareInternal(DatabaseQuery.java:624)
at org.eclipse.persistence.internal.sessions.AbstractSession.processJPAQuery(AbstractSession.java:4363)
at org.eclipse.persistence.internal.sessions.AbstractSession.processJPAQueries(AbstractSession.java:4323)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:584)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:804)
at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:748)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:253)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:728)
... 39 more
Stacktrace
答案 0 :(得分：1)
您可以在此处查看堆栈跟踪中的原因：
Exception Description: Problem compiling [select a from Account as a].
[14, 21] The abstract schema type 'Account' is unknown.
JPA无法找到Account实体，无法创建EntityManagerFactory。
您必须列出persistence.xml中列出Player类的所有实体：
<class>herkansing.Player</class>
<class>herkansing.Account</class>
...
即使您未在代码中显式使用Account实体，也有一个引用它的命名查询，JPA会尝试验证此查询并为您提供异常：
@NamedQueries({
@NamedQuery(name = "Account.getAll", query = "select a from Account as a"),
@NamedQuery(name = "Account.count", query = "select count(a) from Account as a"),
@NamedQuery(name = "Account.findByAccountNr", query = "select a from Account as a where a.accountNr = :accountNr")
}）
或者，您可以删除@NamedQueries声明。