我尝试构建一个Hibernate多对多关系，但是当我调用EntityManager方法＆＃34; merge＆＃34;时，我得到了这个例外。
任何人都知道如何解决它：
来自Hibernate：
Hibernate: select empresa0_.id as id1_1_0_, empresa0_.bairro as bairro2_1_0_, empresa0_.cep as cep3_1_0_, empresa0_.cidade as cidade4_1_0_, empresa0_.cnpj as cnpj5_1_0_, empresa0_.complemento as compleme6_1_0_, empresa0_.endereco as endereco7_1_0_, empresa0_.fantasia as fantasia8_1_0_, empresa0_.numero as numero9_1_0_, empresa0_.razaosoc as razaoso10_1_0_, empresa0_.telefone as telefon11_1_0_, empresa0_.uf as uf12_1_0_ from empresas empresa0_ where empresa0_.id=?
Hibernate: insert into funcionarios (cpf, empresa_id, nome, statusFuncionario) values (?, ?, ?, ?)
2016-02-15 21:10:11,909 ERROR [org.hibernate.property.BasicPropertyAccessor] HHH000122: IllegalArgumentException in class: com.ev.laab.model.Local, getter method of property: id
错误：
Caused by: javax.persistence.PersistenceException: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.ev.laab.model.Local.id
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1310)
at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1316)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:898)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.weld.bean.proxy.AbstractBeanInstance.invoke(AbstractBeanInstance.java:45)
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
at org.jboss.weld.proxies.EntityManager$-1204917128$Proxy$_$$_WeldClientProxy.merge(EntityManager$-1204917128$Proxy$_$$_WeldClientProxy.java)
at com.ev.laab.repository.Funcionarios.guardar(Funcionarios.java:26)
at com.ev.laab.repository.Funcionarios$Proxy$_$$_WeldSubclass.guardar(Funcionarios$Proxy$_$$_WeldSubclass.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:85)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.executeInterception(InterceptorMethodHandler.java:112)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.invoke(InterceptorMethodHandler.java:88)
at org.jboss.weld.bean.proxy.CombinedInterceptorAndDecoratorStackMethodHandler.invoke(CombinedInterceptorAndDecoratorStackMethodHandler.java:55)
at com.ev.laab.repository.Funcionarios$Proxy$_$$_WeldSubclass.guardar(Funcionarios$Proxy$_$$_WeldSubclass.java)
at com.ev.laab.service.FuncionarioService.salvar(FuncionarioService.java:26)
at com.ev.laab.service.FuncionarioService$Proxy$_$$_WeldSubclass.salvar(FuncionarioService$Proxy$_$$_WeldSubclass.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:85)
at org.jboss.weld.interceptor.proxy.InterceptorInvocationContext.proceed(InterceptorInvocationContext.java:127)
at com.ev.laab.util.jpa.TransactionInterceptor.invoke(TransactionInterceptor.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.jboss.weld.interceptor.proxy.SimpleMethodInvocation.invoke(SimpleMethodInvocation.java:30)
at org.jboss.weld.interceptor.proxy.SimpleInterceptionChain.invokeNextInterceptor(SimpleInterceptionChain.java:69)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.executeInterception(InterceptorMethodHandler.java:112)
at org.jboss.weld.interceptor.proxy.InterceptorMethodHandler.invoke(InterceptorMethodHandler.java:88)
at org.jboss.weld.bean.proxy.CombinedInterceptorAndDecoratorStackMethodHandler.invoke(CombinedInterceptorAndDecoratorStackMethodHandler.java:55)
at com.ev.laab.service.FuncionarioService$Proxy$_$$_WeldSubclass.salvar(FuncionarioService$Proxy$_$$_WeldSubclass.java)
at com.ev.laab.controller.FormFuncionarioBean.salvar(FormFuncionarioBean.java:57)
at com.ev.laab.controller.FormFuncionarioBean$Proxy$_$$_WeldClientProxy.salvar(FormFuncionarioBean$Proxy$_$$_WeldClientProxy.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.el.parser.AstValue.invoke(AstValue.java:247)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)
at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
... 29 more
Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of com.ev.laab.model.Local.id
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:187)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:344)
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:4537)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:129)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:924)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:906)
at org.hibernate.engine.spi.CascadingAction$6.cascade(CascadingAction.java:288)
at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:388)
at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:331)
at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:418)
at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:358)
at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:334)
at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:209)
at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:166)
at org.hibernate.event.internal.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:449)
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:220)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154)
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:76)
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:914)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:898)
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:902)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:889)
... 78 more
Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:164)
... 100 more
第一实体：
package com.ev.laab.model;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.constraints.br.CPF;
@Entity
@Table(name = "funcionarios")
public class Funcionario implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
private Empresa empresa;
private String cpf;
private String nome;
private StatusFuncionario statusFuncionario;
private Set<Local> locais = new HashSet<Local>();
@Id
@GeneratedValue
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@NotNull
@ManyToOne
@JoinColumn(name = "empresa_id", nullable = false)
public Empresa getEmpresa() {
return empresa;
}
public void setEmpresa(Empresa empresa) {
this.empresa = empresa;
}
@CPF
@NotBlank
@Column(unique = true, nullable = false, length = 11)
public String getCpf() {
return cpf;
}
public void setCpf(String cpf) {
this.cpf = cpf;
}
@NotBlank
@Column(nullable = false, length = 100)
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
@NotNull
@Enumerated(EnumType.STRING)
@Column(nullable = false, length = 15)
public StatusFuncionario getStatusFuncionario() {
return statusFuncionario;
}
public void setStatusFuncionario(StatusFuncionario statusFuncionario) {
this.statusFuncionario = statusFuncionario;
}
@ManyToMany(cascade = {CascadeType.ALL})
@JoinTable(name="funcionario_local",
joinColumns={@JoinColumn(name="funcionario_id")},
inverseJoinColumns={@JoinColumn(name="Local_id")})
public Set<Local> getLocais() {
return locais;
}
public void setLocais(Set<Local> locais) {
this.locais = locais;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Funcionario other = (Funcionario) obj;
if (id == null) {
if (other.id != null)
return false;
} else if (!id.equals(other.id))
return false;
return true;
}
}
第二实体：
package com.ev.laab.model;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import org.hibernate.validator.constraints.NotEmpty;
@Entity
@Table(name = "locais")
public class Local implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
private Empresa empresa;
private String local;
private Set<Funcionario> funcionarios = new HashSet<Funcionario>();
@Id
@GeneratedValue
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@NotNull
@ManyToOne
@JoinColumn(name = "empresa_id", nullable = false)
public Empresa getEmpresa() {
return empresa;
}
public void setEmpresa(Empresa empresa) {
this.empresa = empresa;
}
@NotEmpty
@Column(nullable = false, length = 100)
public String getLocal() {
return local;
}
public void setLocal(String local) {
this.local = local;
}
@ManyToMany(mappedBy="locais")
public Set<Funcionario> getFuncionarios() {
return funcionarios;
}
public void setFuncionarios(Set<Funcionario> funcionarios) {
this.funcionarios = funcionarios;
}
}
存储库：
package com.ev.laab.repository;
import java.io.Serializable;
import java.util.List;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.PersistenceException;
import com.ev.laab.model.Funcionario;
import com.ev.laab.util.jpa.Transactional;
import com.ev.laab.util.jsf.FacesUtil;
public class Funcionarios implements Serializable {
private static final long serialVersionUID = 1L;
@Inject
EntityManager manager;
public Funcionario guardar(Funcionario funcionario) {
return manager.merge(funcionario);
}
@Transactional
public void remover(Funcionario funcionario) {
try {
//Recarrega o usuário usando método do manager, para estar conectado ao BD.
funcionario = porCPF(funcionario.getCpf());
manager.remove(funcionario);
manager.flush();
} catch (PersistenceException e) {
FacesUtil.addErrorMessage("Erro ao tentar remover o funcionário.");
}
}
public Funcionario porId(Long id) {
return manager.find(Funcionario.class, id);
}
public Funcionario porCPF(String cpf) {
Funcionario funcionario = null;
try {
funcionario = (Funcionario) manager.createQuery("from Funcionario where cpf = :cpf")
.setParameter("cpf", cpf)
.getSingleResult();
} catch (NoResultException e) {
}
return funcionario;
}
@SuppressWarnings("unchecked")
public List<Funcionario> todos() {
return manager.createQuery("from Funcionario").getResultList();
}
}