【发布时间】：2013-10-28 05:48:04
【问题描述】：
我有两个具有多对多关系的表。当我坚持用户不插入任何东西来加入表时，我映射了这两个实体。我正在调试直到坚持，我看到组列表不为空。
没有错误信息只是持久化用户。
用户 用户组 组
我正在使用 netbeans 7.3、Glassfish 3.1.2.2、postgresql 9.1 和 eclipselink 2
另外，我尝试显示以下属性对我不起作用的 sql 脚本。
<property name="eclipselink.logging.logger" value="ServerLogger"/>
<property name="eclipselink.logging.level" value="FINE"/>
<property name="eclipselink.logging.level.sql" value="FINE"/>
<property name="eclipselink.logging.parameters" value="true"/>
抽象 DAO：
public abstract class GenericDAO<E> implements Serializable{
@PersistenceContext
EntityManager entityManager;
public void persist(E object){
entityManager.persist(object);
}
public void merge(E object){
entityManager.merge(object);
}
public void delete(E object){
object = entityManager.merge(object);
entityManager.remove(object);
}
}
用户实体：
@Entity
@Table(name = "users")
@XmlRootElement
@NamedQueries(
{
@NamedQuery(name = "Users.findAll", query = "SELECT u FROM Users u"),
@NamedQuery(name = "Users.findByUserId", query = "SELECT u FROM Users u WHERE u.userId = :userId"),
@NamedQuery(name = "Users.findByName", query = "SELECT u FROM Users u WHERE u.name = :name"),
@NamedQuery(name = "Users.findBySurname", query = "SELECT u FROM Users u WHERE u.surname = :surname"),
@NamedQuery(name = "Users.findByEmail", query = "SELECT u FROM Users u WHERE u.email = :email"),
@NamedQuery(name = "Users.findByUsername", query = "SELECT u FROM Users u WHERE u.username = :username"),
@NamedQuery(name = "Users.findByPassword", query = "SELECT u FROM Users u WHERE u.password = :password")
})
public class Users implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "user_id")
private Integer userId;
@Size(max = 2147483647)
@Column(name = "name")
private String name;
@Size(max = 2147483647)
@Column(name = "surname")
private String surname;
// @Pattern(regexp="[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?", message="Invalid email")//if the field contains email address consider using this annotation to enforce field validation
@Size(max = 2147483647)
@Column(name = "email")
private String email;
@Size(max = 2147483647)
@Column(name = "username")
private String username;
@Size(max = 2147483647)
@Column(name = "password")
private String password;
@ManyToMany(mappedBy = "usersList")
private List<Groups> groupsList;
@OneToMany(mappedBy = "userId")
private List<Person> personList;
//Getters Setters
组实体：
@Entity
@Table(name = "groups")
@XmlRootElement
@NamedQueries(
{
@NamedQuery(name = "Groups.findAll", query = "SELECT g FROM Groups g"),
@NamedQuery(name = "Groups.findByGroupId", query = "SELECT g FROM Groups g WHERE g.groupId = :groupId"),
@NamedQuery(name = "Groups.findByGroupName", query = "SELECT g FROM Groups g WHERE g.groupName = :groupName"),
@NamedQuery(name = "Groups.findByGroupDescription", query = "SELECT g FROM Groups g WHERE g.groupDescription = :groupDescription")
})
public class Groups implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "group_id")
private Integer groupId;
@Size(max = 2147483647)
@Column(name = "group_name")
private String groupName;
@Size(max = 2147483647)
@Column(name = "group_description")
private String groupDescription;
@JoinTable(name = "user_group", joinColumns =
{
@JoinColumn(name = "group_id", referencedColumnName = "group_id")
}, inverseJoinColumns =
{
@JoinColumn(name = "user_id", referencedColumnName = "user_id")
})
@ManyToMany(fetch = FetchType.EAGER)
private List<Users> usersList;
//Getters Setters
用户DAO：
public class UserDAO extends GenericDAO<Users> implements Serializable {
public List<Users> getAllUsers()
{
Query query = entityManager.createNamedQuery("Users.findAll");
List<Users> users = query.getResultList();
return users;
}
}
【问题讨论】：
标签： java sql jpa eclipselink