连接查询我已经创建了两个豆类用户和虚拟域中具有多对多的关系如何编写休眠
@Entity
@Table(name = "tblUser")
public class User implements Serializable {
private Long id;
private String username;
private Set<VirtualDomain> virtualdomainset;
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name = "username", length = 50, nullable = false)
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@ManyToMany(targetEntity = VirtualDomain.class, cascade = {CascadeType.PERSIST},fetch=FetchType.EAGER)
@JoinTable(name = "tblUserDomainRel", joinColumns = @JoinColumn(name = "userid"), inverseJoinColumns = @JoinColumn(name = "domainid"))
public Set<VirtualDomain> getVirtualdomainset() {
return virtualdomainset;
}
public void setVirtualdomainset(Set<VirtualDomain> virtualdomainset) {
this.virtualdomainset = virtualdomainset;
}
}
@Entity
@Table(name = "tblVirtualDomain")
public class VirtualDomain {
private Long id;
private String domainname;
private Set<User> userset;
@Id
@JoinColumn(name = "id")
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Column(name = "domain_name")
public String getDomainname() {
return domainname;
}
public void setDomainname(String domainname) {
this.domainname = domainname;
}
@ManyToMany(cascade = {CascadeType.ALL},fetch=FetchType.EAGER, mappedBy = "virtualdomainset", targetEntity = User.class)
public Set<User> getUserset() {
return userset;
}
public void setUserset(Set<User> userset) {
this.userset = userset;
}
}
如何让用户喜欢通过Hibernate与特定的域用户名的数据。
布莱克。请帮助我 当我使用这个查询它给我的错误java.lang.NoSuchMethodError:org.hibernate.hql.antlr.HqlBaseParser.recover(Lantlr/RecognitionException; Lantlr/collections/impl/BitSet;)V – Jugal 2009-06-04 13:22:18
我'已编辑查询,查询中不应该有任何用户。 – 2009-06-04 13:33:50
你编辑的查询看起来不错,但我只想从用户的用户名字段,所以当我添加选择子句,如选择u.username,它给了我错误org.hibernate.QueryException:查询指定的联接提取,但获取的关联的所有者不是出现在选择列表 – Jugal 2009-06-04 13:53:06