struts和hibernate整合的一种方式（hibernate作为struts插件）

把hibernate用到的包全部放进web应用程序的lib里面，然后定义hibernate.cfg.xml,也就是插件的配置信息，如下

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

<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"

<hibernate-configuration>

<session-factory>

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

<property name="hibernate.dialect">net.sf.hibernate.dialect.MySQLDialect</property>

<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>

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

<property name="session_factory_name">hibernate/session_factory</property>

</session-factory>

</hibernate-configuration>

信息很清楚的，就是配置数据库等信息，我们利用jndi来查找SessionFactory,下面是插件程序，HibernatePlugIn.java

import org.apache.struts.action.PlugIn;

import org.apache.struts.action.ActionServlet;

import org.apache.struts.config.ModuleConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletContext;

import net.sf.hibernate.SessionFactory;

import net.sf.hibernate.cfg.Configuration;

public class HibernatePlugIn

implements PlugIn {

public void destroy() {

}

public void init(ActionServlet servlet, ModuleConfig config) throws

ServletException {

try {

ServletContext context = servlet.getServletContext();

SessionFactory sf = new Configuration().configure().buildSessionFactory();

context.setAttribute("net.sf.hibernate.SessionFactory",sf);

}

catch (Exception ex) {

ex.printStackTrace();

}

相应的，要在struts-config.xml配置插件信息，大概如下，注意路径

<plug-in className="homepage.HibernatePlugIn">

<set-property property="configFilePath" value="/WEB-INF/classes/hibernate.cfg.xml" />

<set-property property="storeInServletContext" value="true" />

</plug-in>

以后就可以利用java.naming.Context,java.naming.InitiaContext来查找

Context ct = new InitialContext();

sessions=(SessionFactory) ct.lookup("hibernate/session_factory");

session=sessions.openSession();

当然，还有另外两种整合方式，我认为这种方法更为灵活，也比较容易掌握