注释异常 Hibernate

Question

您好，我有我的实体类 Enterprise 和 Role，代码如下：

@Entity
@Table(name = "enterprises")
public class Enterprise implements Serializable{

@Id
@Column( name = "user_name" )
private String userName;
private String name;
@Column ( name = "tax_id" )
private String taxId;
private String email;
@Column ( name = "contact_name" )
private String contactName;
@Column ( name = "contact_surname" )
private String contactSurname;
private String phone;
@Column ( name = "enabled_account" )
private Boolean enabledAccount;
@ManyToMany(targetEntity = Role.class, fetch = FetchType.LAZY, cascade = CascadeType.ALL)
@JoinTable(name = "enterprise_role", joinColumns = { 
        @JoinColumn(name = "id_enterprise", nullable = false, updatable = false) }, 
        inverseJoinColumns = { @JoinColumn(name = "id_role", 
                nullable = false, updatable = false) })
private List<Role> roles;
@Column ( name = "enterprise_description" )
private String enterpriseDescription;
private String password;

public Enterprise() {
  roles  = new ArrayList<Role>();
}
//the getters and setters

还有我的角色类：

@Entity
@Table ( name = "roles" )
public class Role implements Serializable {

    @Id
    @Column ( name = "id_role" ) 
    private Integer id;

    @Column ( name = "role_type" )
    private String roleType;
    private String description;

    public Role() {
    }

当我保存一个对象时你没有问题但是当我尝试执行这个查询时： 来自 Enterprise order by user_name desc

得到这个错误：

org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an     unmapped class: com.efix.model.Enterprise.roles[com.efix.model.Role]
at          org.hibernate.cfg.annotations.CollectionBinder.bindManyToManySecondPass(CollectionBinder.java:1068)
at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:600)
at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:541)
at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:43)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1130)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:324)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1286)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)

我已经在 hibernate.xml 配置文件中定义了这个实体，指向具有整个路径的类，例如 com.example.Enterprise 或 com.example.Role。

任何机构都可以这是为什么？提前致谢

我的 hibernate.cfg 是：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
    <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
    <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/prueba_efix</property>
    <property name="hibernate.connection.username">postgres</property>
    <property name="hibernate.connection.password">postgres</property>
    <mapping class="com.efix.model.Enterprise"/>
    <mapping class="com.efix.model.Role"/>
  </session-factory>
</hibernate-configuration>

还有我在 HibernateUtil 使用 Netbeans 生成的配置文件。

Answer 1

从Enterprise实体的@ManyToMany注解中移除targetEntity = Role.class部分。