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