Java Hibernate无法映射2个模型

我有一个测试平台，它有两个多通连接的模型。aaaaaaaaaaaaa这是行不通的

@Entity
@Table(name = "Tests")
public class Test {
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
private String name;
private int count;
private String description;
private boolean free;
@ManyToOne
@JoinColumn(name = "authorId")
private User tAuthor;
private String section;
@OneToMany(mappedBy = "rTest", fetch = FetchType.LAZY, cascade = { CascadeType.ALL })
private List<Result> results = new ArrayList<Result>();
@OneToMany(mappedBy = "qTest", fetch = FetchType.LAZY, cascade = { CascadeType.ALL })
private List<Question> questions = new ArrayList<Question>();
private String commentToAdmin;
@Column(length = 32, columnDefinition = "varchar(32) default 'Developing'")
@Enumerated(EnumType.STRING)
private TestStatus status = TestStatus.Developing;
@CreationTimestamp
private Timestamp createdOn;
@UpdateTimestamp
private Timestamp updateDateTime;

---

在发表这篇文章之前，我被检查了很多次。我仍然不明白为什么我会犯这个错误，在提供的模型中，类用户没有@Id anotation，但在stacktrace中，这一点是没有的，所以我可以假设您使用了方法级anotation，这可能会像您所做的一样，将cousid anotation放在fild Id附近，也许这会对你有所帮助

这是一个例外，这是根本原因：

org.hibernate.MappingException:无法确定列：[org.hibernate.mapping.Column（listTests）]在表：users中的java.util.List的类型

我能想到这个例外的两种可能的含义，以及每种可能的原因

首先，这可能意味着它无法理解

列表

的

测试部分所指的内容。这可能是因为它未配置为将
Test
检测为映射的实体类。然而，我认为这不太可能成为问题

其次，这可能意味着它无法确定数据库中拥有关系的列应该是什么类型。这是因为它将引用的主键的类型没有定义-在这种映射代码中，
@ManyToOne
侧引用的类没有
@Id
字段。果然，
User
没有标记有
@Id
的字段。要解决此问题，请将
@Id
添加到
User
中的
Long Id
字段中。谢谢是的
@Entity
@Table(name = "users")
public class User {
private Long id;
private String username;
private String password;
private String passwordConfirm;
@OneToMany(mappedBy = "tAuthor", fetch = FetchType.LAZY, cascade = { CascadeType.ALL })
private List<Test> listTests = new ArrayList<Test>();
private Set<Role> roles;
@OneToMany(mappedBy = "rUser", fetch = FetchType.LAZY, cascade = { CascadeType.ALL })
private List<Result> result = new ArrayList<Result>();
@CreationTimestamp
private Timestamp dateRegistration;

SEVERE: Exception sending context initialized event to listener instance of     class [org.springframework.web.context.ContextLoaderListener]
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/appconfig-data.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:750)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4735)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5197)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1439)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:953)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1439)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:953)
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:656)
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:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:1249)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.access$600(EntityManagerFactoryBuilderImpl.java:120)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:860)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
... 42 more
Caused by: org.hibernate.MappingException: Could not determine type for:    java.util.List, at table: users, for columns: [org.hibernate.mapping.Column(listTests)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:349)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:322)
at org.hibernate.mapping.Property.isValid(Property.java:241)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:496)
at org.hibernate.mapping.RootClass.validate(RootClass.java:270)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1360)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1851)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)
... 50 more