首页 > 学院 > 编程设计 > 正文

实例讲解如何利用Hibernate开发Blog

2023-06-11 14:56:27
字体:
来源:转载
供稿:网友

首先我们需要建立项目(开发工具采用MYECLIPS3.6),导入STRUTS+HIBERNATE包,然后配置SRC跟目录下的Hibernate.cfg.xml。本文中的示例使用的是MySQL数据库,详细的配置如下: 

  <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"/>  <set-property property="definitions-parser-validate"  value="false"/>  <set-property property="definitions-config"  value="/WEB-INF/title-def.xml"/>  </plug-in>    下面我们定义服务层:    public class ServiceFactory  {  private static ServiceFactory instance;  public synchronized static ServiceFactory getInstance()  {  if (instance == null)  {  instance = new ServiceFactory();  }  return instance;  }  private ServiceFactory()  {  }  public  IService getService()  {  return new ServiceImp();  }  }    import com.tonny.blog.struts.form.*;  import com.tonny.blog.view.*;  import com.tonny.blog.bean.*;  import java.util.*;  import javax.servlet.http.*;  public interface IService  {  public UserContainer login(UserForm userForm);  public boolean logout(UserContainer userContainer);  public boolean addBlog(BlogForm blogForm,String filePath);  public boolean removeBlog(Long id);  public boolean addReview(Long topicId,ReviewForm reviewForm);  public boolean updateBlog(Long id,String conten,String topic);  public boolean removeReview(Long id);  public List getItems();  public ItemView getItem(Long id);  public ItemView getEditItem(Long id);  public List search(SearchForm searchForm);  /**   * @param id   * @param userForm   */  public boolean addUser(UserForm userForm);  }    import com.tonny.blog.struts.form.*;  import com.tonny.blog.view.*;  import com.tonny.blog.dao.*;  import com.tonny.blog.bean.*;  import java.util.*;import javax.servlet.http.*;  import com.tonny.blog.struts.util.FileUpload;  public class ServiceImp implements IService  {  public UserContainer login(UserForm userForm)  {  UserDAO userDAO=DAOFactory.getInstance().getUserDAO();  User user=userDAO.loadUser(userForm.getName());  if(user==null)return new UserContainer("",false);  if(!user.getPassword().equals(userForm.getPassword()))  return new UserContainer("",false);  return new UserContainer(userForm.getName(),true);  }  public boolean logout(UserContainer userContainer)  {  userContainer.setLogin(false);  userContainer.setName("");  return true;  }  public boolean addBlog(BlogForm blogForm,String path)  {  ItemDAO itemDAO=DAOFactory.getInstance().getItemDAO();  Item item=new Item(blogForm.getTopic(),  blogForm.getContent(),  FileUpload.upload(blogForm.getFile(),path),new Date());  itemDAO.addItem(item);  return true;  }  public boolean removeBlog(Long id)  {  ReviewDAO reviewDAO=DAOFactory.getInstance(
发表评论 共有条评论
用户名: 密码:
验证码: 匿名发表