知识大全 Struts中用PlugIn扩展Hibernate的例子
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Struts中用PlugIn扩展Hibernate的例子 以下文字资料是由(全榜网网www.cha138.com)小编为大家搜集整理后发布的内容,让我们赶快一起来看一下吧!
使用Struts的PlugIn技术把HibernateSessionFactory 过程如下 ( ) 创建HibernateSessionFactory java 代码如下 package zy pro td util; import net sf hibernate HibernateException; import net sf hibernate Session; import net sf 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 */ public class HibernateSessionFactory /** * Location of hibernate cfg xml file * NOTICE: Location should be on the classpath as Hibernate uses * #resourceAsStream style lookup for its configuration file That * is place the config file in a Java package the default location * is the default Java package <br><br> * Examples: <br> * <code>CONFIG_FILE_LOCATION = /nf xml * CONFIG_FILE_LOCATION = //foo/bar/nf xml </code> */ private static String CONFIG_FILE_LOCATION = /hibernate cfg xml ; /** Holds a single instance of Session */ private final ThreadLocal threadLocal = new ThreadLocal(); /** The single instance of hibernate configuration */ private final Configuration cfg = new Configuration(); /** The single instance of hibernate SessionFactory */ private net sf hibernate SessionFactory sessionFactory; /** * Returns the ThreadLocal Session instance Lazy initialize * the <code>SessionFactory</code> if needed * * @return Session * @throws HibernateException */ public Session currentSession() throws HibernateException Session session = (Session) threadLocal get(); if (session == null) if (sessionFactory == null) try nfigure(CONFIG_FILE_LOCATION); sessionFactory = cfg buildSessionFactory(); catch (Exception e) System err println( %%%% Error Creating SessionFactory %%%% ); e printStackTrace(); session = sessionFactory openSession(); threadLocal set(session); return session; /** * Close the single hibernate session instance * * @throws HibernateException */ public void closeSession() throws HibernateException Session session = (Session) threadLocal get(); threadLocal set(null); if (session != null) session close(); /** * Default constructor */ public HibernateSessionFactory() ( ) 创建HibernatePlugIn java 代码如下 package zy pro td plugin; /* * Created on Oct * * To change the template for this generated file go to * Window>Preferences>Java>Code Generation>Code and Comments */ import javax servlet ServletException; import apache struts action ActionServlet; import apache struts action PlugIn; import onfig ModuleConfig; import javax naming Context; import javax naming InitialContext; import zy pro td util HibernateSessionFactory; /** * @author sunil * * This class will initialize hibernate and bind SessionFactory in JNDI at the * time of application and startup and unbind it from JNDI at the time of application * shutdown */ public class HibernatePlugin implements PlugIn private static final String jndi_hibernate = jndi_hibernate_factory ; private HibernateSessionFactory hsf; private String name; public HibernatePlugin() hsf=new HibernateSessionFactory(); // This method will be called at the time of application shutdown public void destroy() System out println( Entering HibernatePlugIn destroy() ); //Put hibernate cleanup code here System out println( Exiting HibernatePlugIn destroy() ); //This method will be called at the time of application startup public void init(ActionServlet actionServlet ModuleConfig config) throws ServletException System out println( Entering HibernatePlugIn init() ); System out println( Value of init parameter + getName()); //Unment next o lines if you want to throw UnavailableException from your servlet // if(true) // throw new ServletException( Error configuring HibernatePlugIn ); System out println( Exiting HibernatePlugIn init() ); bindFactoryToJNDI(); private void bindFactoryToJNDI() try Context ctx = new InitialContext(); ctx bind(this jndi_hibernate hsf); System out println( bindind the hibernate factory to JNDI successfully ); catch (Exception e) e printStackTrace(); public String getName() return name; public void setName(String string) name = string; ( ) 配置Struts config xml 如下 <?xml version= encoding= UTF ?> <!DOCTYPE struts config PUBLIC //Apache Sofare Foundation//DTD Struts Configuration //EN config_ _ dtd > <struts config> <form beans> <form bean name= userActionForm type= ntroller UserActionForm /> </form beans> <action mappings> <action name= userActionForm path= /act/log/login scope= request type= ntroller LoginAction /> </action mappings> <plug in className= apache struts tiles TilesPlugin > <set property property= definitions config value= /WEB INF/tiles defs xml /> </plug in> <plug in className= apache struts validator ValidatorPlugIn > <set property property= pathnames value= /WEB INF/validator rules xml /WEB INF/validation xml /> </plug in> <plug in className= zy pro td plugin HibernatePlugin /> <plug in className= zy pro td plugin HibernateSessionFactoryPlugIn /> </struts config> 这一部分就是你的嵌入代码 ( )创建ActionForm 代码如下 package ntroller; import apache struts action *; import javax servlet *; public class UserActionForm extends ActionForm private String password; private String username; public String getPassword() return password; public void setPassword(String password) this password = password; public String getUsername() return username; public void setUsername(String username) this username = username; public ActionErrors validate(ActionMapping actionMapping HttpServletRequest ServletRequest) /**@todo: finish this method this is just the skeleton */ return null; public void reset(ActionMapping actionMapping HttpServletRequest ServletRequest) ( )创建Action package ntroller; import apache struts action *; import javax servlet *; import javax naming Context; import javax naming InitialContext; import net sf hibernate SessionFactory; import net sf hibernate cha138/Article/program/Java/ky/201311/28279相关参考
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