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我需要选择多个实体,用 JPA 2.0 映射并且我正在使用 Hibernate。

我正在验证用户登录。我有一个ClienteDTO扩展抽象类Pessoa(人)的类(又名客户端)

@Entity
@Table(name = "cliente")
@PrimaryKeyJoinColumn(name = "id") 
public class ClienteDTO extends Pessoa implements Serializable {

private static final long serialVersionUID = 9057647385901589752L;

@OneToOne(mappedBy="cliente", cascade=CascadeType.ALL)
private LoginDTO login;

public ClienteDTO() {

}

    //get set
}

这是我的课Pessoa(葡萄牙语中的“人”)

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
@SequenceGenerator(name = "PESSOA_SEQ", sequenceName = "s_pessoa", initialValue = 1000, allocationSize = 20)
public abstract class Pessoa implements Serializable {

private static final long serialVersionUID = 5777501399478522675L;

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "PESSOA_SEQ")
@Column(unique = true, nullable = false, updatable = false)
private Long id;

private String nome;

private String email;

private String cpf;

public Pessoa() {

}

//get set

}

这就是Login课堂。

@Entity
@Table(name = "login")
@NamedQueries({

    @NamedQuery(name = "obterUsuarioPorUsuarioSenha", query = "select l from LoginDTO where l.usuario = :usuarioParam and l.senha = :senhaParam"),

})
public class LoginDTO implements Serializable {

private static final long serialVersionUID = 1718733412549158088L;

@Id
@Column(nullable = false)
@GeneratedValue(generator = "gen")
@GenericGenerator(name = "gen", strategy = "foreign", parameters = @Parameter(name = "property", value = "cliente"))
private Long idLoginCliente;

@OneToOne(fetch=FetchType.LAZY)
@PrimaryKeyJoinColumn
private ClienteDTO cliente;

@Column(unique = true, nullable = false)
private String usuario;

@Column(nullable = true)
private String senha;

public LoginDTO() {

}

// get set

}

我的数据库是这样生成的:

表 ClienteDTO(客户端)id = 1000

佩索阿表 (人)

id = 1000
nome = ABC
email = xpto@xpto.xpto
cpf = 2131313124124

表登录

idlogincliente = 1000
usuario (user) = admin
senha (password) = 8c48747q4s9c4q65

我正在使用@NamedQueryatLogin的实体。我使用以下方法调用 EJB:

public LoginDTO efetuarLogin(LoginDTO usuarioDTO) throws Exception {

    Query q = em.createNamedQuery("obterUsuarioPorUsuarioSenha");
    q.setParameter("usuarioParam", usuarioDTO.getUsuario());
    q.setParameter("senhaParam", usuarioDTO.getSenha());

    try {
        return (LoginDTO) q.getSingleResult();
    } catch (NoResultException ne) {
        throw new NoResultException(ne.getMessage());
    }

}

问题是我无法进行查询。在这种情况下,我得到了错误

原因:javax.persistence.NoResultException:未找到查询的实体

是因为 FETCH 吗?还是实体的关系不正确?查询错误?

======================================

回答:

我只是个白痴。如您所见,我正在加密我的密码。在我的托管 bean 上,我没有从表单中加密密码。无论如何,这个线程可能会以某种方式帮助人们。多谢你们。

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