Hibernate 休眠一对多注释(映射)错误
下面是我的代码,我想在我的公司类和个人类中实现OnetoMany Hibernate映射 代码对我来说似乎是正确的,但在打印数据时输出有错误 如果有人能帮我解决这个问题 我希望从公司类到多人进行一对多映射,并一次性打印所有映射数据Hibernate 休眠一对多注释(映射)错误,hibernate,Hibernate,下面是我的代码,我想在我的公司类和个人类中实现OnetoMany Hibernate映射 代码对我来说似乎是正确的,但在打印数据时输出有错误 如果有人能帮我解决这个问题 我希望从公司类到多人进行一对多映射,并一次性打印所有映射数据 Exception in thread "main" org.hibernate.MappingException: Could not determine type for: java.util.List, at table: Company, for column
Exception in thread "main" org.hibernate.MappingException: Could not determine type for: java.util.List, at table: Company, for columns: [org.hibernate.mapping.Column(person)]
at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:336)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:310)
at org.hibernate.mapping.Property.isValid(Property.java:241)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:496)
at org.hibernate.mapping.RootClass.validate(RootClass.java:270)
at org.hibernate.cfg.Configuration.validate(Configuration.java:1358)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1849)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1928)
at Rajat.Practice1.Main.main(Main.java:24)
公司级
package Rajat.Practice1;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
public class Company {
private int c_id;
private String C_name;
public List<Person> person = new ArrayList<Person>();
@Id
@GeneratedValue
@Column(name="c_id")
public int getC_id() {
return c_id;
}
public void setC_id(int c_id) {
this.c_id = c_id;
}
@Column(name="name")
public String getC_name() {
return C_name;
}
public void setC_name(String c_name) {
C_name = c_name;
}
@Override
public String toString() {
return "Company [c_id=" + c_id + ", C_name=" + C_name + ", person=" + person + "]";
}
public List<Person> getPerson() {
return person;
}
@OneToMany(mappedBy="company", fetch=FetchType.EAGER)
public void setPerson(List<Person> person) {
this.person = person;
}
}
主类
package Rajat.Practice1;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.spi.ServiceRegistry;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistryBuilder;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class Main {
public static void main(String[] args) {
Configuration cfg=new Configuration();
cfg.configure("hibernate.cfg.xml");
SessionFactory sf=cfg.buildSessionFactory();
Session session=sf.openSession();
Transaction tx=session.beginTransaction();
List <Person> lp=new ArrayList<Person>();
PersonDetail pd=new PersonDetail();
pd.setCity("jaipur");
pd.setState("jaipur");
Person p=new Person();
p.setName("Rajat");
Person p1=new Person();
p1.setName("Dynamo");
Company c=new Company();
c.setC_name("Protechgenie");
p.setCompany(c);
p1.setCompany(c);
c.getPerson().add(p);
c.getPerson().add(p1);
lp.add(p);
lp.add(p1);
p.setP_detail(pd);
session.save(c);
session.save(p);
session.save(p1);
session.getTransaction().commit();
Company com=(Company)session.get(Company.class, 1);
Person per=(Person) session.get(Person.class, 1);
System.out.println(com);
}
}
package Rajat.Practice1;
导入java.util.ArrayList;
导入java.util.List;
导入javax.imageio.spi.ServiceRegistry;
导入org.hibernate.Session;
导入org.hibernate.SessionFactory;
导入org.hibernate.Transaction;
导入org.hibernate.cfg.AnnotationConfiguration;
导入org.hibernate.cfg.Configuration;
导入org.hibernate.service.ServiceRegistryBuilder;
导入org.hibernate.tool.hbm2ddl.SchemaExport;
公共班机{
公共静态void main(字符串[]args){
Configuration cfg=新配置();
configure(“hibernate.cfg.xml”);
SessionFactory sf=cfg.buildSessionFactory();
Session Session=sf.openSession();
事务tx=会话.beginTransaction();
List lp=new ArrayList();
PersonDetail pd=新的PersonDetail();
赛特城警署(“斋浦尔”);
pd.setState(“斋浦尔”);
人员p=新人员();
p、 setName(“Rajat”);
人员p1=新人员();
p1.设定名称(“发电机”);
公司c=新公司();
c、 setC_名称(“Protechgenie”);
p、 赛特公司(c);
p1.赛特公司(c);
c、 getPerson().add(p);
c、 getPerson().add(p1);
lp.add(p);
有限合伙人(p1);
p、 setP_详图(pd);
会议.保存(c);
session.save(p);
session.save(p1);
session.getTransaction().commit();
Company com=(Company)session.get(Company.class,1);
Person per=(Person)session.get(Person.class,1);
System.out.println(com);
}
}
- 在
类中,取消对映射配置的注释Company
- 在
类中,注释(Person
)应该位于getter方法之上@OneToMany(mappedBy=“company”,fetch=FetchType.EAGER)
@实体
公营公司{
私人国际中心id;
私有字符串C_名称;
public List person=new ArrayList();
@身份证
@生成值
@列(name=“c_id”)
public int getC_id(){
返回c_id;
}
公共无效setC_id(内部c_id){
this.c_id=c_id;
}
@列(name=“name”)
公共字符串getC_name(){
返回C_名称;
}
public void setC_name(字符串c_name){
C_name=C_name;
}
@凌驾
公共字符串toString(){
返回“公司[c_id=“+c_id+”,c_name=“+c_name+”,person=“+person+””;
}
@OneToMany(mappedBy=“company”,fetch=FetchType.EAGER)
公共列表getPerson(){
返回人;
}
公众人物(名单人物){
这个人=人;
}
}
@实体
公共类人员2{
私有int-Pid;
私有字符串名称;
上市公司;
@身份证
@生成值
@列(name=“Pid\u pk”)
公共int getPid(){
返回Pid;
}
公共无效设置pid(内部pid){
Pid=Pid;
}
@列(name=“name”)
公共字符串getName(){
返回名称;
}
公共void集合名(字符串名){
this.name=名称;
}
@manytone(fetch=FetchType.EAGER)
@JoinColumn(name=“c_id”)
上市公司{
返回公司;
}
上市公司(公司){
这个公司=公司;
}
@凌驾
公共字符串toString(){
返回“Person[Pid=“+Pid+”,name=“+name+”,company=“+company+”];
}
package Rajat.Practice1;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.spi.ServiceRegistry;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistryBuilder;
import org.hibernate.tool.hbm2ddl.SchemaExport;
public class Main {
public static void main(String[] args) {
Configuration cfg=new Configuration();
cfg.configure("hibernate.cfg.xml");
SessionFactory sf=cfg.buildSessionFactory();
Session session=sf.openSession();
Transaction tx=session.beginTransaction();
List <Person> lp=new ArrayList<Person>();
PersonDetail pd=new PersonDetail();
pd.setCity("jaipur");
pd.setState("jaipur");
Person p=new Person();
p.setName("Rajat");
Person p1=new Person();
p1.setName("Dynamo");
Company c=new Company();
c.setC_name("Protechgenie");
p.setCompany(c);
p1.setCompany(c);
c.getPerson().add(p);
c.getPerson().add(p1);
lp.add(p);
lp.add(p1);
p.setP_detail(pd);
session.save(c);
session.save(p);
session.save(p1);
session.getTransaction().commit();
Company com=(Company)session.get(Company.class, 1);
Person per=(Person) session.get(Person.class, 1);
System.out.println(com);
}
}
@Entity
public class Company {
private int c_id;
private String C_name;
public List<Person2> person = new ArrayList<Person2>();
@Id
@GeneratedValue
@Column(name="c_id")
public int getC_id() {
return c_id;
}
public void setC_id(int c_id) {
this.c_id = c_id;
}
@Column(name="name")
public String getC_name() {
return C_name;
}
public void setC_name(String c_name) {
C_name = c_name;
}
@Override
public String toString() {
return "Company [c_id=" + c_id + ", C_name=" + C_name + ", person=" + person + "]";
}
@OneToMany(mappedBy="company", fetch=FetchType.EAGER)
public List<Person2> getPerson() {
return person;
}
public void setPerson(List<Person2> person) {
this.person = person;
}
}
@Entity
public class Person2 {
private int Pid;
private String name;
public Company company;
@Id
@GeneratedValue
@Column(name="Pid_pk")
public int getPid() {
return Pid;
}
public void setPid(int pid) {
Pid = pid;
}
@Column(name="name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@ManyToOne(fetch=FetchType.EAGER)
@JoinColumn(name="c_id")
public Company getCompany() {
return company;
}
public void setCompany(Company company) {
this.company = company;
}
@Override
public String toString() {
return "Person [Pid=" + Pid + ", name=" + name + ", company=" + company + "]";
}