hibernate session.get()方法（这里的session跟html根本不是一回事）

hibernate.cfg.xml

<!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="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql:///test</property>
<property name="connection.username">root</property>
<property name="connection.password"></property>
<property name="hbm2ddl.auto">update</property>
<mapping resource="cn/itcast/hibernate/domain/User.hbm.xml"/>

</session-factory>
</hibernate-configuration>

cn.itcast.hibernate.domain文件夹下有两个文件

User.java

package cn.itcast.hibernate.domain;

import java.util.Date;

public class User
{
private int id;
private String name;
private Date birthday;
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 Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}

}

User.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="cn.itcast.hibernate.domain">
<class name="User">
<id name="id">
<generator class="native"></generator>
</id>
<property name="name"></property>
<property name="birthday"></property>
</class>

</hibernate-mapping>

cn.itcast.hibernate 包下面有两个文件

Base.java

package cn.itcast.hibernate;

import java.util.Date;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

import cn.itcast.hibernate.domain.User;

public class Base {

public static void main(String[] args) {

User user=getUser(3);
System.out.println(user.getBirthday());
System.out.println("end");
}
static User getUser(int id)
{
Session s=null;
try {
s=HibernateUtil.getSession();
User user=(User)s.get(User.class, id);
return user;
}
finally
{
if(s!=null)
s.close();
}

}

}

HibernateUtil.java

package cn.itcast.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public final class HibernateUtil
{
private static SessionFactory sessionFactory;

public static SessionFactory getSessionFactory() {
return sessionFactory;
}

public static Session getSession() {
return sessionFactory.openSession();
}
private HibernateUtil()
{

}
static
{
Configuration cfg=new Configuration();
cfg.configure();//如果说名字不是叫做“hibernate.cfg.xml”,需要在参数当中申明
sessionFactory=cfg.buildSessionFactory();
}
}