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Hibernate

  1. Advantage of Hibernate over JDBC

  2. Hibernate Setup with an web Application

  3. First Hibernate Application

  4. Hibernate mapping with Database TABLE

  5. Hibernate Data Type-Java Data Type - SQL Data Type mapping

  6. One to Many Relation in Hibernate

  7. One to Many Relation in Hibernate bi-directional

  8. Many to Many Relation in Hibernate

  9. HQL: The Hibernate Query Language

  10. Criteria Queries

  11. Criteria Queries : Equal (eq), Not Equal(ne), Less than (le), greater than (gt),greater than or equal(ge) and Ordering the results

  12. Criteria Queries: And OR conditions

  13. Hibernate generator to generate id (primary key)

  14. prevent concurrent update in Hibernate,slate object updatation in Hibernate,version checking in Hibernate

    Struts


  1. Model View Controller (MVC)

  2. Model View Controller (MVC)

  3. Struts Flow-How Struts Works?

  4. Struts Tutorial - Struts Setup- First Struts Action class setup

  5. Message Resources

  6. Validation Framework

  7. Validation Framework-client side

  8. ForwardAction

  9. IncludeAction

  10. DispatchAction

  11. LookupDispatchAction

  12. DynaActionForm

  13. DynaActionForm

  14. Struts Tutorial - Mutli-click prevention using struts tokens-Prevent Duplicate Submission

  15. Logic Iterate Map and List


JSP


  1. JSP Tutorial

  2. Introduction to JSP

  3. JSP Comments

  4. JSP Syntax

  5. JSP Scripting Elements :Scriptlet, expression, declaration

  6. JSP Directives

  7. implicit objects in JSP

  8. JSP Actions

  9. Introduction to JSP

  10. jsp:useBean

  11. The jsp:setProperty Action

  12. The jsp:getProperty Action

  13. Introduction to JSP



Spring



  1. Spring Tutorial

  2. Introduction to Spring

  3. Benefits of Using Spring Framework

  4. Inversion of Control in Spring

  5. Introduction to BeanFactory

  6. Dependency Injection in Spring

  7. Collections Setter Injection

  8. Bean Scopes in Spring

  9. Spring IOC Setup Step by Step

  10. Bean Lifecycle in Spring

  11. ApplicationContext

  12. MessageSources in Spring

  13. Web Spring MVC framework

  14. Developing Your First Spring Web Application

  15. Developing Your Second Spring Web Application with Spring Form

  16. Developing Your First Spring Web Application with Spring Validation Framework with Code Example

  17. Spring integration with Hibernate

Struts Tutorial -- Code Examples

DispatchAction

DispatchAction is another useful built-in Struts Action.Use DispatchAction when a set of actions is closely related and separating them into multiple Actions would result in duplication of code. For example : If there are three operation like delete, activate, deactivate employee. You can create three different Actions – ActivateEmpAction, DeleteEmpAction and DeActivateEmpAction. This is a valid approach, although not elegant since there might be duplication of code across the Actions since they are related. DispatchAction is the answer to this problem. With DispatchAction, you can combine all three Actions into one.

Follow the below five steps to setup DispatchAction.

Step 1. In the JSP page (empdetails.jsp)

<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html:form>
<html:form action="/saveEmp" method="post">
<html:link page="/emp/empaction.do?step=delete&emp_id=1" />
<html:link page="/emp/empaction.do?step=activate&emp_id=1" />
<html:link page="/emp/empaction.do?step=deactivate&emp_id=1" />
</html:form>

Step 2. Adding ActionForm Entry in struts-config.xml

Add the following entry in the struts-config.xml file.

<form-bean name="EmpForm"   
         type="com.techfaq.form.EmpForm">
        
</form-bean>

Step 3. Add action mapping in the struts-config.xml file:

Add the following action mapping in the struts-config.xml file:

<action path="/empaction" type="com.techfaq.action.EmpAction"
     name="EmpForm"
     scope="request"
     validate="true"
     parameter="step"
     input="/jsp/empform.jsp">

    <forward name="delete-success" path="/jsp/deletesuccess.jsp"/>
    <forward name="activate-success" path="/jsp/activatesuccess.jsp"/>
    <forward name="deactivate-success" path="/jsp/deactivatesuccess.jsp"/>
    </action>

Step 4. In the Action class.

public class EmpAction extends DispatchAction {
public ActionForward activate(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws Exception
{
//your logic
mapping.findForward("activate-success");
}
public ActionForward delete(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws Exception
{
//your logic
mapping.findForward("delete-success");
} public ActionForward deactivate(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws Exception
{ //your logic
mapping.findForward("deactivate-success");
}
}

Step 5. In the EmpForm

public class EmpForm extends ActionForm {
int empId;
String firstName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public int getEmpId() {
return empId;
}
public void setEmpId(int empId) {
this.empId = empId;
}
}

Now in the browser type http://localhost:8080/app/jsp/empdetails.jsp

In the above example DispatchAction was used handle hyperlinks. DispatchAction is a good choice when there are form submissions using the regular buttons . Just name all the buttons same. <html:submit property="step">Delete</html:submit> <html:submit property="step">Activate</html:submit> <html:submit property="step">Deactivate</html:submit>

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