*************************hibernate.cfg.xml

<?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory><!-- Database connection settings --> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property> <property name="connection.username">root</property> <property name="connection.password">123456</property><!-- SQL dialect --> <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property><!-- Echo all executed SQL to stdout --> <property name="show_sql">true</property><!-- Drop and re-create the database schema on startup --> <property name="hbm2ddl.auto">create</property><!-- Names the annotated entity class --> <mapping class="com.ij34.dao.Address"/> <mapping class="com.ij34.dao.People"/> </session-factory></hibernate-configuration>

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package com.ij34.dao;import java.util.HashSet; import java.util.Set;import javax.persistence.*;@Entity @Table(name="people_inf") public class People implements java.io.Serializable{ private static final long serialVersionUID = 1L; @Id private String first; @Id private String last; private int age; // 記錄該People實體關聯(lián)的所有Address實體 @OneToMany(targetEntity=Address.class,mappedBy="people",cascade=CascadeType.ALL) private Set<Address> address=new HashSet<>(); public String getFirst() { return first; } public void setFirst(String first) { this.first = first; } public String getLast() { return last; } public void setLast(String last) { this.last = last; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Set<Address> getAddress() { return address; } public void setAddress(Set<Address> address) { this.address = address; }}

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package com.ij34.dao;import javax.persistence.*;@Entity @Table(name="Address_inf") public class Address{ @Id @Column(name="address_id") @GeneratedValue(strategy=GenerationType.IDENTITY) private int addressId; private String message; @ManyToOne(targetEntity=People.class) // 使用復合主鍵 @JoinColumns({ @JoinColumn(name="people_first",referencedColumnName="first",nullable=false), @JoinColumn(name="people_last",referencedColumnName="last",nullable=false) }) private People people; public int getAddressId() { return addressId; } public void setAddressId(int addressId) { this.addressId = addressId; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public People getPeople() { return people; } public void setPeople(People people) { this.people = people; }}

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package com.ij34.web;import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.hibernate.cfg.Configuration; import org.hibernate.service.*;import com.ij34.dao.Address; import com.ij34.dao.People; public class test01 { public static void main(String[] args)throws Exception { //實例化Configuration Configuration conf=new Configuration().configure(); ServiceRegistry SR=new StandardServiceRegistryBuilder().applySettings(conf.getProperties()).build(); // 以Configuration實例創(chuàng)建SessionFactory實例 SessionFactory SF=conf.buildSessionFactory(SR); //create session Session session=SF.openSession(); //start 事務 Transaction tx=session.beginTransaction(); People person = new People(); person.setAge(29); // 為復合主鍵的兩個成員設置值 People people=new People(); people.setAge(22); people.setFirst("姓林"); people.setLast("名彪"); Address a1=new Address(); a1.setMessage("廣州"); a1.setPeople(people); Address a2=new Address(); a2.setMessage("茂名"); a2.setPeople(people); session.save(people); session.save(a1); session.save(a2); tx.commit(); session.close(); SF.close(); } }

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