Java Hibernate映射异常!(无法确定类型:java.util.Map)

Question

我创建了一个名为Movie的课程,其中包括以下字段:

    @Id
@GeneratedValue
private Long id;
private String name;
@ElementCollection(targetClass = String.class)
private Map<String, String> properties;
private Double rate;
private Integer votersCount;
private Date releaseDate;
private Integer runtime;
@ManyToMany
@JoinTable(name = "movie_director")
@IndexColumn(name = "directorIndex")
private List<Person> directors;
@ManyToMany
@JoinTable(name = "movie_writer")
@IndexColumn(name = "writerIndex")
private List<Person> writers;
@OneToMany
@IndexColumn(name = "roleIndex")
private List<MovieRole> movieRoles;
@ManyToMany
@JoinTable(name = "movie_genre")
@IndexColumn(name = "genreIndex")
private List<Genre> genres;

正如你所看到的,我使用了hibernate注释,对象就是bean.但是当我尝试使用以下代码打开我的hibernate会话时......

session = HibernateSessionFactory.getSessionFactory().openSession();

我遇到了一个无法映射Java.Util.Map类的问题.这是异常堆栈跟踪:

org.hibernate.MappingException: Could not determine type for: java.util.Map, for columns: [org.hibernate.mapping.Column(properties)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:266)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253)
at org.hibernate.mapping.Property.isValid(Property.java:185)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:410)
at org.hibernate.mapping.RootClass.validate(RootClass.java:192)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1099)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1284)
at main.HibernateSessionFactory.getSessionFactory(HibernateSessionFactory.java:29)
at main.MainClass.main(MainClass.java:26)

我是新来的冬眠,并不确切知道发生了什么......请帮助我!

Answer 1

那是因为你必须使用一些 jpa2 实现！这家伙也有同样的问题