Hibernate integrate with Struts - select records from table

DataBase Design

Database Name: Hiber

Table Table: hiber

Step 1:

Create Database.

mysql > create database Hiber;

Step 2:

Create Table

Mysql > create table hiber(stuname varchar(40),stuno int,primary key(stuno));

I have inserted into two records into hiber table.

Step 1). How to create Project for Hibernate Struts integration.

1.1) Open netbean 6.9

1.2) Go to File – New Project(ctrl+shift+N).

New Project window will open.

Where we select

java web – under Categories

Web Application—under Projects

New web Application window will open.

Where we give Project name. I have given project name as HibernateStruts

Next

New window will open. Where we select server. I have select Apache Tomcat 6.0.26

New window will open

Where we select framework.

Here we select two frameworks. Because we integrate Hibernate with Struts.

Step 1:

Select Hibernate 3.2.5 in framework

Below Hibernate 3.2.5 Configuration

Select New Database Connection

After select New Database Connection

New Database Connection window will open.

Here we made some changes.

Driver Name: MySQL(Connector/J Driver)

Host : localhost

Database : hiber

User name : root

Password : sure

Display Name(Optional) : HiberDB

Select show JDBC URL

You can see.

Below Hibernate 3.2.5 Configuration

Database Connection: HiberDB

Step 2:

Select Struts 1.3.8 in framework

Below Struts 1.3.8 Configuration

Application Resource : Resources.ApplicationResource

Select Add Struts TLDs

Screen shot

Finish

Successfully Project Created.

Note:

We delete two jsp files such as index.jsp and welcomeStruts.jsp

************************************************************************

Step 2:

2.1). Folder Creation for storing jsp files.

Right click on web pages and Select New--Folder

New Folder window will open. Where we give Folder name as jsp.

Finish.

Folder named as jsp have been created successfully.

2.2). Folder Creation for Hibernate files named as Hiber

Folder name is Hiber.

Right Click on Source packages

New Folder window will open.

Finish

Hiber Folder for Hibernate successfully created.

2.3). Create Another Folder for ActionForm for Struts

named as ActionForms

Follow previous step to create Folder

2.4). Create another Folder for Action for struts

named as Actions

2.5). Create another Folder for Plugin for java class.

Named as Plugin

Step: 3

Creating ActionForms.

How to create ActionForm in Struts

Before creating ActionForms, we should analyze the property we need to create ActionForms.

I have used two property one is studentname and another one is studentno.

I have given actionform name as StudentForms

Insert the following coding into StudentForms

package ActionForms;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.ActionMessage;

public class StudentForms extends org.apache.struts.action.ActionForm

{

private String studentname;

private int studentno;

public String getStudentname()

{

return studentname;

}

public void setStudentname(String studentname)

{

this.studentname = studentname;

}

public int getStudentno()

{

return studentno;

}

public void setStudentno(int studentno)

{

this.studentno = studentno;

}

Step 4:

Create Plugin.

I have given name for Plugin java as HibernatePlugin.java

Include following coding into HibernatePlugin.java

package Plugin;

import java.net.URL;

import javax.servlet.ServletException;

import org.apache.struts.action.ActionServlet;

import org.apache.struts.action.PlugIn;

import org.apache.struts.config.ModuleConfig;

import org.hibernate.HibernateException;

import org.hibernate.MappingException;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

public class HibernatePlugin implements PlugIn

{

private Configuration config;

private SessionFactory factory;

private String path = "/hibernate.cfg.xml";

private static Class clazz = HibernatePlugin.class;

public static final String KEY_NAME = clazz.getName();

public void setPath(String path)

{

this.path = path;

}

public void init(ActionServlet servlet, ModuleConfig modConfig)

throws ServletException {

try {

//save the Hibernate session factory into serlvet context

URL url = HibernatePlugin.class.getResource(path);

config = new Configuration().configure(url);

factory = config.buildSessionFactory();

servlet.getServletContext().setAttribute(KEY_NAME, factory);

} catch (MappingException e) {

throw new ServletException();

} catch (HibernateException e) {

throw new ServletException();

}

public void destroy() {

try {

factory.close();

} catch (HibernateException e) {

e.printStackTrace();

}

Screen Shot

Step 5:

Add plugin into struts-config.xml

Step 6:

We have to create all files for Hibernate.

Such as Reverse Engineering and HibernateUtil and POJO class and Mapping files.

Step 6.1:

Create Hibernate Reverse Engineering wizard

Step 6.2:

Create HibernateUtil.java

Step 6.3:

Create POJO class and mapping files

How to create these files? Click

Step 7:

Creating Action

I have given name as StudentAction

Include following coding into StudentAction

package Actions;

import ActionForms.StudentForms;

import Plugin.HibernatePlugin;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.hibernate.SessionFactory;

import org.hibernate.*;

import org.hibernate.cfg.*;

import org.hibernate.Criteria.*;

import Hiber.Hiber;

import java.util.List;

public class StudentAction extends org.apache.struts.action.Action

{

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response)

throws Exception

{

StudentForms sform=(StudentForms)form;

SessionFactory sessionFactory = (SessionFactory) servlet.getServletContext().getAttribute(HibernatePlugin.KEY_NAME);

Session session=sessionFactory.openSession();

Criteria crit=session.createCriteria(Hiber.class);

List list=crit.list();

request.setAttribute("slist",list);

return mapping.findForward("success");

}

Step 8:

Creating jsp files.

Step 8.1).
Home.jsp

Include following coding into Home.jsp

< %@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" % >
< %@taglib uri="/WEB-INF/struts-html.tld" prefix="html" % >
< %@taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" % >
< html >
< head >
< title > JSP Page < /title >
< /head >
< body >
< html:form action="student" method="post" >

< html:submit value="OK"/ >

< /html:form >
< /body >
< /html >

Step 8.2).

To get records from Database

Create another jsp file named success.jsp

< %@page import="Hiber.Hiber"% >
< %@page import="ActionForms.StudentForms"% >
< %@page import="java.util.*"% >

< html >
< head >
< title > Hibernate with Struts Example < /title >
< /head >
< body >

< %
List list=(List)request.getAttribute("slist");
out.println(list.size());
Iterator it=list.iterator();
while(it.hasNext())
{
Hiber h=(Hiber)it.next();
out.println(h.getStuname());
out.println(h.getStuno());
}
% >
< /body >
< /html >

Step 9:

Made some changes in Struts-config.xml

- - - - -

< action-mappings >
< action
input="/"
name="StudentForms"
path="/student"
scope="session"
type="Actions.StudentAction" >
< forward name="success" path="/jsp/success.jsp"/ >
< /action >
< /action-mappings >

- - - - -

Step 10:

Run Home.jsp

Output

Click OK button

We have learned how to integrate Hibernate with Struts from this post.

Thank you .
By Yours
S.Sureshkumar, M.Sc, M.Phil,

Way To J2ee Developer

Monday, November 22, 2010