Hibernate之一对多（注解实现）

package com.oneToMany;

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.JoinTable;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.CascadeType;

@Entity
@Table(name="Student")
public class Student {

    private long id;
    private String studentName;
    private Set<Phone> studentPhoneNumbers=new HashSet<Phone>(0);
    public Student(){
        //Hibernate调用
    }
    public Student(String studentName, Set<Phone> studentPhoneNumbers){
        this.studentName=studentName;
        this.studentPhoneNumbers=studentPhoneNumbers;
    }
    public void setId(long id) {
        this.id = id;
    }
    @Id//主键
    @GeneratedValue
    @Column(name="Student_id")
    public long getId() {
        return id;
    }
    public void setStudentName(String studentName) {
        this.studentName = studentName;
    }
    /**
     * @Column列字段名
     */
    @Column(name="Student_name",length=100,nullable=false)
    public String getStudentName() {
        return studentName;
    }
    public void setStudentPhoneNumbers(Set<Phone> studentPhoneNumbers) {
        this.studentPhoneNumbers = studentPhoneNumbers;
    }
    @OneToMany//在Student实体类和Phone实体类之间创建一对多的关系(一个学生有多个号码)
    @Cascade({CascadeType.ALL})
    /**
     * @JoinTable 创建关联的表Student_phone
     * @JoinColumn 创建在关联的表中关联的字段（列）
     * joinColumns “一端”和“多端”关联的字段
     * inverseJoinColumns “多端”和“一端”关联的字段
     */
    @JoinTable(name="Student_phone",joinColumns={@JoinColumn(name="Student_id")},
    inverseJoinColumns={@JoinColumn(name="Phone_id")})
    public Set<Phone> getStudentPhoneNumbers() {
        return studentPhoneNumbers;
    }
}

package com.oneToMany;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="Phone")
public class Phone {

    private long phoneId;
    private String phoneNumber;
    private String phoneType;
    public  Phone() {
        //Hibernate调用
    }
    public  Phone(String phoneNumber,String phoneType) {
        this.phoneNumber=phoneNumber;
        this.phoneType=phoneType;
    }
    public void setPhoneId(long phoneId) {
        this.phoneId = phoneId;
    }
    @Id
    @GeneratedValue
    @Column(name="Phone_id")
    public long getPhoneId() {
        return phoneId;
    }
    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }
    @Column(name="number",nullable=false,length=15)
    public String getPhoneNumber() {
        return phoneNumber;
    }
    public void setPhoneType(String phoneType) {
        this.phoneType = phoneType;
    }
    @Column(name="type",nullable=false,length=10)
    public String getPhoneType() {
        return phoneType;
    }
}

package com.oneToMany;

import java.util.HashSet;
import java.util.Set;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

public class TestDemo {

    public static void main(String[] args) {

        StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
                .configure("hibernate.cfg.xml").build();
        SessionFactory factory = new MetadataSources(registry).buildMetadata()
                .buildSessionFactory();
        // 获取Session
        Session session = factory.openSession();
        Transaction transaction = session.beginTransaction();
        try {
            Set<Phone> phoneNumbers = new HashSet<Phone>();
            phoneNumbers.add(new Phone("123345","house"));
            phoneNumbers.add(new Phone("456722454","mobile"));
            Student student = new Student("Jeff", phoneNumbers);
            session.save(student);
            transaction.commit();
        } catch (Exception e) {
            transaction.rollback();// 回滚事务
            e.printStackTrace();
        } finally {
            if (session != null){
                session.close();
            }
        }
    }

}

效果图