Hibernate4入门学习过程记录一

使用IDEA，src下的资源文件无法自动编译输出到out目录下，网上给出4种解决方案，请参考http://blog.csdn.net/shifangwannian/article/details/48882201

本人采用建立resources文件夹并Mark Directory as --->Resources Root的方案，是实际项目中这种方法也是最常用的。

简单的过程不做记录，记下关键性配置文件，以及方法。

hibernate.cfg.xml文件

<?xml version='1.0' encoding='utf-8'?><!DOCTYPE hibernate-configuration PUBLIC    "-//Hibernate/Hibernate Configuration DTD//EN"    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration>  <session-factory>    <property name="connection.url">jdbc:mysql://localhost:3306/hibernatetest</property>    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>    <property name="connection.username">root</property>     <property name="connection.password">123456</property>         <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>    <property name="hibernate.show_sql">true</property>            <!-- DB schema will be updated if needed -->    <property name="hbm2ddl.auto">update</property>         <mapping resource="com/domain/User.hbm.xml"></mapping>  </session-factory></hibernate-configuration>

User.java

package com.domain;public class User {    private String id;    private String name;    private Integer age;    private String address;    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public boolean equals(Object o) {        if (this == o) return true;        if (o == null || getClass() != o.getClass()) return false;        User user = (User) o;        if (id != null ? !id.equals(user.id) : user.id != null) return false;        if (name != null ? !name.equals(user.name) : user.name != null) return false;        if (age != null ? !age.equals(user.age) : user.age != null) return false;        if (address != null ? !address.equals(user.address) : user.address != null) return false;        return true;    }    public int hashCode() {        int result = id != null ? id.hashCode() : 0;        result = 31 * result + (name != null ? name.hashCode() : 0);        result = 31 * result + (age != null ? age.hashCode() : 0);        result = 31 * result + (address != null ? address.hashCode() : 0);        return result;    }}

User.hbm.xml

<?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>    <class name="com.domain.User">        <id name="id">            <generator class="uuid"/>        </id>        <property name="name"/>        <property name="age"/>        <property name="address"/>    </class></hibernate-mapping>

test01.java

package com.test;import com.domain.User;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;import org.hibernate.service.ServiceRegistryBuilder;import org.hibernate.tool.hbm2ddl.SchemaExport;public class test01 {    /**     * 根据hibernate配置文件，生成数据库     */    public static void exportEntityToDatabase(){        Configuration configuration = new Configuration().configure();        SchemaExport schemaExport = new SchemaExport(configuration);        schemaExport.create(true, true);    }    /**     * hibernate4 保存对象     */    public static void saveUserTest(){        Configuration configuration = new Configuration().configure();                Session session = null;        ServiceRegistry serviceRegistry = new ServiceRegistryBuilder()                .applySettings(configuration.getProperties())                .buildServiceRegistry();        SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);                try {            session = sessionFactory.openSession();            session.beginTransaction();                        User user = new User();            user.setName("小新");            user.setAge(22);            user.setAddress("浙");            session.save(user);            session.getTransaction().commit();        }catch (Exception e){            e.printStackTrace();            session.getTransaction().rollback();        }finally {            if (session != null && session.isOpen()){                session.close();            }        }    }        public static void main(String[] args) {//        exportEntityToDatabase();        saveUserTest();    }}