hibernate学习笔记之demo

POJO对象：

public class Person {

public Integer id;

public String name;

public Date birthday;

public int password;

public Person(){}

public Person(String name, Date birthday, int password) {

super();

this.name = name;

this.birthday = birthday;

this.password = password;

}

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Date getBirthday() {

return birthday;

}

public void setBirthday(Date birthday) {

this.birthday = birthday;

}

public int getPassword() {

return password;

}

public void setPassword(int password) {

this.password = password;

}

@Override

public String toString() {

return "Person [id=" + id + ", name=" + name + ", birthday=" + birthday

+ ", password=" + password + "]";

}

}

对象与表映射文件

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping SYSTEM "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" >

<!-- 持久化映射 （将Java对象映射到数据库表-->

<hibernate-mapping>

<class name="helloworld.Person" table="t_person">

<id name="id">

<generator class="native"></generator>

</id>

<property name="name"></property>

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

<property name="birthday"></property>

</class>

</hibernate-mapping>

hibernate配置文件，放在根目录下：

<!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.url">jdbc:mysql:///hibernate_db</property>

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

<property name="hibernate.connection.password">199151</property>

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

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

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

<mapping resource="helloworld\Person.hbm.xml"/>

</session-factory>

</hibernate-configuration>

注意：此处没有配置dialect属性，根据MySQL的版本而定，我用的为最新版本的MySQL，如果配置了dialect属性，自动创建表失败，如果是老版本的额MySQL，则必须有dialect属性。

测试test类：

package hibernateTest;

import helloworld.Person;

import java.util.Date;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.cfg.Configuration;

public class HIbernateTest {

public static void main(String []args){

Configuration config = new Configuration().configure();

SessionFactory factory = config.buildSessionFactory();

Session session = factory.openSession();

Transaction tx = session.beginTransaction();

Person p = new Person("admin",new Date(),123456);

session.save(p);

tx.commit();

session.close();

factory.close();

}

}