Using open source project Hibernate Develop blog system

The project development tool uses the MYECLIPS3.6, first is establishes the project, the import struts+hibernate package, then configures the SRC and the directory hibernate.cfg.xml. I'm using the MySQL database , So the configuration is as follows:

 
   
   
 
   
     
    
    
        !--Properties--> 
    
         
    
     root< /property> 
     
         
     
      jdbc:mysql://localhost:3306/tonnyblog
       
      
         
      
       net. 
        SF . Hibernate.dialect.MySQLDialect 
       
      
         
       
       
      
         
      
       org.gjt.mm.mysql.driver
        
       
 
       
        !--mapping files--> 
       
         
        
       
    
        
       
    
        
       
 
       
     
      
     
    
    
   
 
   
 Hibernate-configuration> 
  
 

mapping is the corresponding mapping for JavaBean.





below we continue to hibernate the next step of the program to write

 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 February 6, 2004 


  */ 


 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 () {





     } 


} 

Create 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 (); 
     &NBSP 
 
      public void Destroy () {
          try{
 & nbsp            hibernateutil.closesession (); 
          } 
          catch (hibernateexception hex) {
              H Ex.printstacktrace (); 
          
 
      } 
 
} 
 

The above is the basic configuration of the Hibernate, use DAO mode to the database operation, add the following configuration:

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 Add Configuration

  
   processorclass= "Com.tonny.blog.struts.controller.IndexRequestProcessor"/>
   

   
   

   plug-in classname= "Com.tonny.blog.struts.plugin.HibernatePlugin"
   

   
    
    

    
     
      
      

      
     
    
   
  

below we define the service layer:

public class servicefactory{
     private static servicefactory Instance 
 
     public synchronized static Servicefactory getinstance () {
         if (instanc E = 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 to 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 (). Getreviewdao (); 


 Itemdao itemdao=daofactory.getinstance (). Getitemdao (); 


 Itemdao.removeitem (ID); 


 return reviewdao.removereviews (ID); 


     } 





 public boolean Addreview (Long topicid,reviewform reviewform) {


 Reviewdao reviewdao=daofactory.getinstance (). Getreviewdao (); 


 Review review=new Review (Reviewform.getname (), Reviewform.getcontent (), 


 topicid,new Date ()); 





Return Reviewdao.addreview (review); 


     } 


 public boolean updateblog (Long id,string content,string topic) {


 Itemdao itemdao=daofactory.getinstance (). Getitemdao (); 


 Item item=new item (); 


 Item.setid (ID); 


 item.setcontent (content); 


 item.settopic (topic); 


 return Itemdao.updatitem (item); 


     } 


 public boolean AddUser (UserForm UserForm) {


 Userdao userdao= (Userdao) daofactory.getinstance (). Getuserdao (); 


 User User=new User (Userform.getname (), Userform.getpassword ()); 





return Userdao.adduser (user); 


     } 


 public boolean removereview (Long ID) {


 Reviewdao reviewdao=daofactory.getinstance (). Getreviewdao (); 


 return Reviewdao.removereview (ID); 


     } 





 public List GetItems () {


 Itemdao itemdao=daofactory.getinstance (). Getitemdao (); 


 List Items=itemdao.loaditems (); 


 List itemviews=new ArrayList (); 


 for (iterator It=items.iterator (); It.hasnext ();) {


 Item item= (item) It.next (); 


 Itemview itemview=new Itemview (); 


Itemview.setcontent (Item.getcontent ()); 


 itemview.setdate (Item.getdate ()); 


 Itemview.setfile (Item.getfile ()); 


 Itemview.setid (Item.getid ()); 


 Itemview.settopic (Item.gettopic ()); 


 Itemviews.add (Itemview); 


         } 


 return itemviews; 


     } 


 


 public Itemview Getedititem (Long id) {


 Itemdao itemdao=daofactory.getinstance (). Getitemdao (); 


 Item Item=itemdao.loaditem (ID); 


 Itemview itemview=new Itemview (); 


Itemview.setcontent (Item.getcontent ()); 


 itemview.setdate (Item.getdate ()); 


 Itemview.setfile (Item.getfile ()); 


 Itemview.setid (Item.getid ()); 


 Itemview.settopic (Item.gettopic ()); 


 return itemview; 


     } 


 public List Search (Searchform searchform) {


 Itemdao itemdao=daofactory.getinstance (). Getitemdao (); 


 List Items=itemdao.loaditems (Searchform.getkeyword ()); 


 List itemviews=new ArrayList (); 


 for (iterator It=items.iterator (); It.hasnext ();) {


 Item item= (item) It.next (); 


Itemview itemview=new Itemview (); 


 itemview.setcontent (Item.getcontent ()); 


 itemview.setdate (Item.getdate ()); 


 Itemview.setfile (Item.getfile ()); 


 Itemview.setid (Item.getid ()); 


 Itemview.settopic (Item.gettopic ()); 


 Itemviews.add (Itemview); 


         } 


 return itemviews; 


     } 





} 

Below is how the action invokes the above services:

import java.io.*; 
 Import Javax.servlet.RequestDispatcher; 
 Import javax.servlet.ServletException; 
 Import javax.servlet.http.HttpServletRequest; 
 Import javax.servlet.http.HttpSession; 
 Import Javax.servlet.http.HttpServletResponse; 
 
 Import org.apache.struts.action.Action; 
 Import Org.apache.struts.action.ActionError; 
 Import org.apache.struts.action.ActionErrors; 
 Import Org.apache.struts.action.ActionForm; 
 Import Org.apache.struts.action.ActionForward; 
 Import org.apache.struts.action.ActionMapping; 
 Import Org.apache.struts.action.ActionServlet; 
 Import org.apache.struts.util.MessageResources; 
 
 Import com.tonny.blog.struts.form.*; 
 
 public class Addblog extends blogbaseaction{
 
 
  //---------------------------------------------- --------------local forwards 
   static final private String forward_success = "Success"; 
   Static final private String forward_failure = "Failure";
 
  //------------------------------------------------------------Action Methods 
 
   Public Actionforward Execute (actionmapping mapping, actionform form, 
       HttpServletRequest request,  HttpServletResponse response) 
       throws Exception {
       
       if (!islogin (Request)) return Mapping.findforward (forward_failure); 
       Service.addblog (blogform) Form, ((blogform) Form). GetFile (). GetFileName ()); 
       return Mapping.findforward (forward_success); 
  } 
 
} 

The next step is to manipulate the database for the DAO Layer:

Import com.tonny.blog.bean.*;

Import java.util.List;


Public interface Itemdao {

public boolean AddItem (item item);

public Boolean RemoveItem (Long ID);

Public List loaditems ();

Public List loaditems (String topic);

Public Item Loaditem (Long ID);

public boolean Updatitem (item item);


}

Daofactory Call the strength of the method:

 import com.tonny.blog.dao.*; 





 import net.sf.hibernate.cfg.Configuration; 


 import net.sf.hibernate.*; 


 import java.util.*; 


 import com.tonny.blog.bean.*; 








 public class Itemdaohibernate extends Daohibernate implements Itemdao {


 public itemdaohibernate () {


     } 





 public boolean AddItem (item item) {


try{


 BeginTransaction (); 


 Session.save (item); 


 commit (); 


 return true; 


        } 


 catch (Hibernateexception e) {


 rollback (); 


 return false; 


         } 








     } 


 public boolean Updatitem (item item) {


 try{


 BeginTransaction (); 


 Item It=item; 


 it= (Item) session.load (Item.class, (Item.getid ())); 


 


 It.settopic (Item.gettopic ()); 


 System.out.println ("Item.gettopic ()" +item.gettopic ()); 


 it.setcontent (Item.getcontent ()); 


 System.out.println ("Item.getcontent ()" +item.getcontent ()); 


 Session.flush (); 


 commit (); 


 return true; 


        } 


 catch (Hibernateexception e) {


 System.err.println ("========>hibernate exception" +e); 


 rollback (); 


 return false; 


         } 








     } 


 public boolean RemoveItem (Long ID) {


 try{


 BeginTransaction (); 


 session.delete ("from Com.tonny.blog.bean.Item as Item where item.id=" +id); 


 commit (); 


 return true; 





          } 


 catch (Hibernateexception e) {


 rollback (); 


 return false; 


         } 





      } 





 public List LoadItems () {





 List List=null; 


 try{


BeginTransaction (); 


 list=session.find ("from Com.tonny.blog.bean.Item as Item"); 


 commit (); 


          } 


 catch (Hibernateexception e) {


 System.out.println ("Load Blog failed"); 


 rollback (); 





          } 


 return list; 





     } 








 public List loaditems (String topic) {


 List List=null; 


 try{


 BeginTransaction (); 


Query query=session.createquery ("Com.tonny.blog.bean.Item as Item where item.topic like '%" +topic+ "%"); 


 list=query.list (); 


 commit (); 


 return list; 





          } 


 catch (Hibernateexception e) {


 System.out.println ("Load blog failed"); 


 rollback (); 


          } 


 return list; 





     } 





 public Item Loaditem (Long id) {


 Item Item=null; 


 try{


BeginTransaction (); 


 Query query=session.createquery ("from Com.tonny.blog.bean.Item as Item where Item.id=:id"); 


 Query.setlong ("id", Id.longvalue ()); 


 iterator it=query.iterate (); 


 if (It.hasnext ()) return item= (item) It.next (); 


 commit (); 


          } 


 catch (Hibernateexception e) {


 System.out.println ("Load blog failed"); 


 rollback (); 


          } 


 return item; 


     } 


} 

Here implementation of the database query, modify, delete operations, no many-to-many operation.