<?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>

        <!-- DataSource配置 -->

        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>

        <property name="connection.url">jdbc:mysql://localhost:3306/test</property>

        <property name="connection.username">root</property>

        <property name="connection.password"></property>

        <!-- 指定连接数据库所使用的SQL方言-->

        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!-- 控制台是否输出SQL语句 -->

        <property name="show_sql">true</property>

        <!-- 式化Hibernate的SQL输出语句 -->

        <property name="hibernate.format_sql">true</property>

        <!-- 指定程序是否在数据库自动创建表 -->

        <property name="hbm2ddl.auto">update</property>

        <!-- 指定映射文件的路径 -->

        <mapping resource="zr/com/pojo/Company.hbm.xml"/>

        <mapping resource="zr/com/pojo/Employee.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC

        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

    <!-- 映射关系 -->

    <class name="zr.com.pojo.Company" table="company">

        <!-- 主键生成策略 -->

        <id name="companyId" column="company_id">

            <generator class="native"/>

        </id>

        <property name="name" column="company_name"/>

        <!-- 一对一 -->

        <one-to-one name="employee" class="zr.com.pojo.Employee" property-ref="company" cascade="all" constrained="true"></one-to-one>

    </class>

</hibernate-mapping>

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC

        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

    <!-- 映射关系 -->

    <class name="zr.com.pojo.Employee" table="employee">

        <!-- 主键生成策略 -->

        <id name="id" column="employee_id">

            <generator class="native"/>

        </id>

        <property name="name" column="employee_name"/>

        <!-- 一对一 -->

        <many-to-one name="company" class="zr.com.pojo.Company" column="company_id" cascade="all" unique="true">

        </many-to-one>

    </class>

</hibernate-mapping>

package zr.com.pojo;

public class Company {

    private int companyId;

    private String name;

    private Employee employee;

    public Employee getEmployee() {

        return employee;

    }

    public void setEmployee(Employee employee) {

        this.employee = employee;

    }

    public int getCompanyId() {

        return companyId;

    }

    public void setCompanyId(int companyId) {

        this.companyId = companyId;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Company() {

        super();

    }

    public Company(int companyId, String name) {

        super();

        this.companyId = companyId;

        this.name = name;

    }

    @Override

    public String toString() {

        return "Company [companyId=" + companyId + ", name=" + name + "]";

    }

}

package zr.com.pojo;

public class Employee {

    private int id;

    private String name;

    private Company company;

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Company getCompany() {

        return company;

    }

    public void setCompany(Company company) {

        this.company = company;

    }

    public Employee() {

        super();

    }

    public Employee(int id, String name, Company company) {

        super();

        this.id = id;

        this.name = name;

        this.company = company;

    }

    @Override

    public String toString() {

        return "Employee [id=" + id + ", name=" + name + ", company=" + company

                + "]";

    }

}

package zr.com.test;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.hibernate.service.ServiceRegistryBuilder;

import zr.com.pojo.Company;

import zr.com.pojo.Employee;

public class TestClass {

    public static void main(String[] args) {

        // 创建Configuration 对象

        Configuration configuration = new Configuration().configure("hibernate.cfg.xml");

        // 创建ServiceRegistry 对象

        ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();

        // 创建SessionFactory 对象

        SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);

        // 创建Session 对象

        Session session = sessionFactory.openSession();

        // 开启事务

        session.beginTransaction();

        // 创建实体类

        Company company = new Company();

        company.setName("baidu");

        Employee employee = new Employee();

        employee.setName("lf");

        // 关联

        company.setEmployee(employee);

        employee.setCompany(company);

        // 插入数据

        session.save(employee);

        // 提交事务

        session.getTransaction().commit();

    }

}