在eclipse里面很简单,首先是有myEclipse,或者是有Hibernate的其它插件,然后对于这个项目add HibernateCapabilities就可以了。这个东东的核心是配置一个数据库和jdbc之间的连接代码如下
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">root</property>
<property name="connection.url">jdbc:mysql://10.66.12.222:3306/test</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="show_sql">true</property>
<mapping resource="cn/edu/cuc/main/User.hbm.xml" />
</session-factory>
</hibernate-configuration>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">root</property>
<property name="connection.url">jdbc:mysql://10.66.12.222:3306/test</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="show_sql">true</property>
<mapping resource="cn/edu/cuc/main/User.hbm.xml" />
</session-factory>
</hibernate-configuration>
实际上很简单,在最后一句是对于一个的表的配置,什么样子的的表呢?
上传表了之后按照如下的结构构建文件结构。
其中User.hbm.xml就是对于User表的映射文件,这个xml文件如下所示
<?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.edu.cuc.main">
<class name="User" table="test">
<id name="id" column="id" type="integer">
<generator class="native"/>
</id>
<property name="username" type="string" column="username"/>
<property name="password" column="pwd"/>
</class>
</hibernate-mapping>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping package="cn.edu.cuc.main">
<class name="User" table="test">
<id name="id" column="id" type="integer">
<generator class="native"/>
</id>
<property name="username" type="string" column="username"/>
<property name="password" column="pwd"/>
</class>
</hibernate-mapping>
Hibernate包加载之后会自动生成一个HibernateSessionFactory.java供我们调用。
package cn.edu.cuc.main;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/** *//**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory ...{
/** *//**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is
* in the default package. Use #setConfigFile() to update
* the location of the configuration file for the current session.
*/
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
private HibernateSessionFactory() ...{
}
/** *//**
* Returns the ThreadLocal Session instance. Lazy initialize
* the <code>SessionFactory</code> if needed.
*
* @return Session
* @throws HibernateException
*/
public static Session getSession() throws HibernateException ...{
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) ...{
if (sessionFactory == null) ...{
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
/** *//**
* Rebuild hibernate session factory
*
*/
public static void rebuildSessionFactory() ...{
try ...{
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) ...{
System.err
.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
/** *//**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException ...{
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) ...{
session.close();
}
}
/** *//**
* return session factory
*
*/
public static org.hibernate.SessionFactory getSessionFactory() ...{
return sessionFactory;
}
/** *//**
* return session factory
*
* session factory will be rebuilded in the next call
*/
public static void setConfigFile(String configFile) ...{
HibernateSessionFactory.configFile = configFile;
sessionFactory = null;
}
/** *//**
* return hibernate configuration
*
*/
public static Configuration getConfiguration() ...{
return configuration;
}
}
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/** *//**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory ...{
/** *//**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is
* in the default package. Use #setConfigFile() to update
* the location of the configuration file for the current session.
*/
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new Configuration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
private HibernateSessionFactory() ...{
}
/** *//**
* Returns the ThreadLocal Session instance. Lazy initialize
* the <code>SessionFactory</code> if needed.
*
* @return Session
* @throws HibernateException
*/
public static Session getSession() throws HibernateException ...{
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) ...{
if (sessionFactory == null) ...{
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession()
: null;
threadLocal.set(session);
}
return session;
}
/** *//**
* Rebuild hibernate session factory
*
*/
public static void rebuildSessionFactory() ...{
try ...{
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) ...{
System.err
.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
/** *//**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException ...{
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) ...{
session.close();
}
}
/** *//**
* return session factory
*
*/
public static org.hibernate.SessionFactory getSessionFactory() ...{
return sessionFactory;
}
/** *//**
* return session factory
*
* session factory will be rebuilded in the next call
*/
public static void setConfigFile(String configFile) ...{
HibernateSessionFactory.configFile = configFile;
sessionFactory = null;
}
/** *//**
* return hibernate configuration
*
*/
public static Configuration getConfiguration() ...{
return configuration;
}
}
此外,我还需要把Test封装成为一个类似于实体Bean的东西,代码如下,这些东西可以自动生成Seter和Getter方法。
package cn.edu.cuc.main;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/** *//**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory ...{
/** *//**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
/** *//**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory ...{
/** *//**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is