<!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><property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">123456</property><property name="hibernate.connection.url">jdbc:mysql://localhost:3306/webproject</property><!--反正下面这段话我直接跑去hibernate.dialect包下复制文件路径的时候gg了要指定特定的方言--><property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property><property name="hibernate.show_sql">true</property><!--如果不存在就自动创建一个，如果存在就修改--><property name="hibernate.hbm2ddl.auto">update</property><!--如果不加下面这句话，引入你自己写的配置文件，你将会很绝望--><mapping resource="com/shaoxin/cn/User.hbm.xml"/></session-factory>
</hibernate-configuration>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping package="com.shaoxin.cn"><class name="User"  table="user"><!--复合主键--><composite-id name="compositionUser" ><key-property name="username" column="username"></key-property><key-property name="address" column="address"></key-property></composite-id><!--下面的分别是实体类中的属性对应数据库中的字段--><property name="age" column="age"></property></class>
</hibernate-mapping>

package com.shaoxin.cn;public class User {private CompositionUser compositionUser;private int age;public CompositionUser getCompositionUser() {return compositionUser;}public void setCompositionUser(CompositionUser compositionUser) {this.compositionUser = compositionUser;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}

package com.shaoxin.cn;import java.io.Serializable;public class CompositionUser implements Serializable {private String username;private String address;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}}

package com.shaoxin.cn;import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.Test;public class UserTest {@Testpublic void testUser() throws Exception {Session session = new Configuration().configure().buildSessionFactory().openSession();Transaction tx = session.beginTransaction();CompositionUser compositionUser = new CompositionUser();compositionUser.setAddress("江西南昌");compositionUser.setUsername("邵欣");User user = new User();user.setCompositionUser(compositionUser);user.setAge(23);session.save(user);tx.commit();session.close();}
}