我们今天要讨论struts Hibernate ,下面通一实例,我们能更深刻的了解struts Hibernate的整合问题。希望本文能对大家了解有所帮助。
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"?>
- "http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">
- <hibernate-configuration>
- <session-factory>
- <property name="show_sql">false< SPAN>property>
- <property name="use_outer_join">true< SPAN>property>
- <property name="hibernate.dialect">net.sf.hibernate.dialect.MySQLDialect< SPAN>property>
- <property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver< SPAN>property>
- <property name="hibernate.connection.url">jdbc:mysql:///test< SPAN>property>
- <property name="hibernate.connection.username">root< SPAN>property>
- <property name="hibernate.connection.password">< SPAN>property>
- <property name="hibernate.connection.pool.size">20< SPAN>property>
- <property name="session_factory_name">hibernate/session_factory< SPAN>property>
- <mapping resource="/homepage/Artical.hbm.xml"/>
- < SPAN>session-factory>
- < SPAN>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" />
- < SPAN>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。以上介绍struts Hibernate。
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