利用开源项目Hibernate开发Blog系统

　　开发工具采用MYECLIPS3.6,首先是建立项目，导入STRUTS HIBERNATE包，然后配置SRC跟目录下的hibernate.cfg.xml.我采用的是MYSQL数据库，所以配置如下：

＜hibernate-configuration＞

    ＜session-factory＞
        ＜!-- properties --＞
        ＜property name="connection.username"＞root＜/property＞
        ＜property name="connection.url"＞jdbc:mysql://localhost:3306/tonnyblog＜/property＞
        ＜property name="dialect"＞net.sf.hibernate.dialect.MySQLDialect＜/property＞
        ＜property name="connection.password"＞＜/property＞
        ＜property name="connection.driver_class"＞org.gjt.mm.mysql.Driver＜/property＞

        ＜!-- mapping files --＞
        ＜mapping resource="com/tonny/blog/bean/User.hbm.xml"/＞
   ＜mapping resource="com/tonny/blog/bean/Item.hbm.xml"/＞
   ＜mapping resource="com/tonny/blog/bean/Review.hbm.xml"/＞

    ＜/session-factory＞

＜/hibernate-configuration＞

　　mapping为JAVABEAN所对应的映射。

　　下面我们继续HIBERNATE程序的下步编写

import net.sf.hibernate.HibernateException;
import net.sf.hibernate.Session;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.cfg.Configuration;

/**
 *  Description of the Class
 *
 * @author    tonny
 * @created    2004年2月6日
 */
public class HibernateUtil {

    private final static SessionFactory sessionFactory;

    static {
        try {
            sessionFactory =
                    new Configuration().configure().buildSessionFactory();
        } catch (HibernateException ex) {
            throw new RuntimeException(
                    "Exception building SessionFactory: "   ex.getMessage(),ex);
        }
    }

    private HibernateUtil(){

    }

    /**
     *  Description of the Field
     */
    private final static ThreadLocal session = new ThreadLocal();


    /**
     *  Description of the Method
     *
     * @return                         Description of the Return Value
     * @exception  HibernateException  Description of the Exception
     */
    public static Session currentSession() throws HibernateException {
        Session s = (Session) session.get();
        if (s == null) {
            s = sessionFactory.openSession();
            session.set(s);
        }
        return s;
    }


    /**
     *  Description of the Method
     *
     * @exception  HibernateException  Description of the Exception
     */
    public static void closeSession() throws HibernateException {
        Session s = (Session) session.get();
        session.set(null);
        if (s != null) {
            s.close();
        }
    }

    public static void init(){

    }
}

　　创建sessionFactory

import net.sf.hibernate.HibernateException;
import net.sf.hibernate.SessionFactory;
import net.sf.hibernate.cfg.Configuration;

import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;

import com.tonny.blog.dao.hibernate.HibernateUtil;


public class HibernatePlugin implements org.apache.struts.action.PlugIn{
     public void init(ActionServlet servlet, ModuleConfig config){
       HibernateUtil.init();
     }

     public void destroy(){
         try{
             HibernateUtil.closeSession();
         }
         catch(HibernateException hex){
             hex.printStackTrace();
         }

     }

}

　　以上为HIBERNATE基本配置，对数据库操作采用DAO模式，增加配置如下：

import com.tonny.blog.dao.hibernate.*;

public class DAOFactory {
    private static DAOFactory instance;

    public synchronized static DAOFactory getInstance() {
        if (instance == null) {
            instance = new DAOFactory();
        }
        return instance;
    }
    private DAOFactory() {
    }

    public ItemDAO getItemDAO(){
        return new ItemDAOHibernate();
    }

    public ReviewDAO getReviewDAO(){
        return new ReviewDAOHibernate();
    }

    public UserDAO getUserDAO(){
     return new UserDAOHibernate();
    }

}

　　struts.xml增加配置

＜controller contentType="text/html" debug="3" locale="true" nocache="true"
              processorClass="com.tonny.blog.struts.controller.IndexRequestProcessor"/＞
  ＜message-resources parameter="com.tonny.resource"/＞
  ＜plug-in className="com.tonny.blog.struts.plugin.HibernatePlugin"/＞
  ＜plug-in className="org.apache.struts.tiles.TilesPlugin"＞
    ＜set-property property="moduleAware" value="true"/＞
    ＜set-property property="definitions-debug" value="0"/＞
    ＜set-property property="definitions-parser-details" value="0"/＞
			   
			   

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