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[转载]怎样利用Hibernate开发Blog实例分析

原创 Linux操作系统 作者:dinner1007 时间:2019-04-07 10:39:05 0 删除 编辑
怎样利用Hibernate开发Blog实例分析
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:
  
  
  
  <!-- properties -->
  
  root
  

  
  jdbc:mysql://localhost:3306/tonnyblog
  

  
  net.sf.hibernate.dialect.MySQLDialect
  

  
  
  org.gjt.mm.mysql.Driver
  

  <!-- mapping files -->
  
  
  
  

  
  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:
  
    debug="3" locale="true"
  nocache="true"
  processorClass=
  "com.tonny.blog.struts.controller.IndexRequestProcessor"/>
  
    "com.tonny.blog.struts.plugin.HibernatePlugin"/>
  
  
  
    value="0"/>
    value="false"/>
    value="/WEB-INF/title-def.xml"/>
  

  
  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(

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